release: prepare v0.1.6

.clang-format

@@ -0,0 +1,19 @@
+---
+BasedOnStyle: LLVM
+Language: Cpp
+Standard: c++17
+ColumnLimit: 100
+IndentWidth: 4
+InsertBraces: true
+ContinuationIndentWidth: 4
+UseTab: Never
+BreakBeforeBraces: Attach
+AllowShortBlocksOnASingleLine: Never
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortEnumsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: Never
+AllowShortLoopsOnASingleLine: false
+BinPackArguments: false
+BinPackParameters: false
+SortIncludes: Never

.gitignore

@@ -3,6 +3,9 @@ build/
 builddir/
 meson-logs/
 meson-private/
+/web/node_modules/
+/web/dist/
+/web/coverage/
 
 # Android / Gradle
 .gradle/

AGENTS.md

@@ -6,15 +6,21 @@ Trainlog consists of:
 
 - a native Android application for fast workout and body-data capture;
 - a Unix/Linux C17 terminal TUI for durable history, correction, analysis,
-  visualization, and manual synchronization. The current authorized
-  `TUI_NOTCURSES_V1` infrastructure tranche migrates the active rendering/input
-  backend from legacy ncursesw to Notcurses without changing product semantics;
+  visualization, and manual synchronization, using Notcurses as its completed
+  active rendering/input backend;
+- a loopback-only local Web adapter whose Dashboard is implemented on the
+  0.1.2 development branch; its Analyse, Programmes, Sessions, and Exercises
+  routes remain placeholders pending separate contracts;
 - a small user-session PC agent, `trainlog-syncd`, for Android-triggered
   synchronization;
 - versioned JSON synchronization artifacts exchanged over direct MTP.
 
 The desktop SQLite database is the canonical long-term history.
 
+The full-generation orchestrator and Web sync surface are implemented behind a
+trusted local opt-in. Default deployed automatic exchange remains V3 until the
+separate controlled-rollout decision.
+
 Android has an independent local SQLite store for offline capture. SQLite
 database files are never synchronized directly.
 
@@ -164,7 +170,7 @@ It is not the canonical analytics store.
 The Android UI is driven by exercise metadata, never by exercise-name
 heuristics.
 
-Android local SQLite schema v17 retains the exactly-one durable active-session
+Android local SQLite schema v24 retains the exactly-one durable active-session
 draft introduced in v4.
 Every meaningful draft/form mutation is persisted by the repository. Back,
 backgrounding and process death never delete the draft. Home offers explicit
@@ -178,7 +184,7 @@ from actual occurrence data after the additive v10 -> v11 migration. Existing
 rows retain `load_mode=none`, zero rest and NULL targets. Android v12 adds the
 durable flattened exercise-alias mapping used to resolve retired creator IDs.
 Desktop schema v12 owns the same alias compatibility boundary. Later additive
-desktop migrations reach v18 and Android migrations reach v17 without changing
+desktop migrations reach v26 and Android migrations reach v24 without changing
 that identity contract. The active
 completed-session exchange is the separate strict
 `trainlog-mobile-export` V3; V1/V2 remain readable and `TRAINLOG_FORMAT_V1`
@@ -215,9 +221,12 @@ trainlog-sync-receipt-v1.json
 Android -> PC data uses:
 
 ```text
-trainlog-mobile-export-v1.json
+trainlog-mobile-export-v3.json
 ```
 
+V3 is the active completed-session snapshot. V1/V2 remain readable legacy
+inputs and `TRAINLOG_FORMAT_V1` remains a separate frozen contract.
+
 PC -> Android catalog data uses:
 
 ```text
@@ -232,11 +241,14 @@ Desktop SQLite schema is versioned with:
 PRAGMA user_version;
 ```
 
-The current desktop schema is v18. Schema v9 added an occurrence-owned explicit
+The current desktop schema is v26. Schema v9 added an occurrence-owned explicit
 maximum result; v10/v11 added body-zone and planning metadata; v12 added durable
 flattened exercise aliases; v13-v18 add machine metadata, feedback and
 revisions, occurrence tracking snapshots, causal profile state, and AI proposal
-storage/publication state. None changes `TRAINLOG_FORMAT_V1`.
+storage/publication state; v19-v21 add lifecycle, causal deletion, and staged
+generation/ACK ledgers; v22-v24 add generation archival, manual preparations,
+and durable preparation withdrawal; v25 adds Programs; and v26 additively adds
+logical Program deletion. None changes `TRAINLOG_FORMAT_V1`.
 
 Every incompatible schema evolution requires an explicit migration and
 regression coverage.
@@ -264,6 +276,30 @@ User-facing code must not intentionally return placeholders such as
 
 ## 10. Documentation
 
+Repository documentation and publication language is:
+
+```text
+README and canonical documentation: English
+CHANGELOG and release notes: English
+New or modified source comments: English
+User interface: preserve its actual localization
+```
+
+Exact UI strings, user data, identifiers, commands, paths, protocol fields,
+version/status markers, citations, and historical evidence are not translated
+merely to satisfy the prose-language rule.
+
+Production code, tests, fixtures expressed as source, and repository tooling
+must remain readable by a human reviewer. Do not compress functions, control
+flow, declarations, assertions, or cleanup onto one line to reduce line or
+token count. Grouped missions may and should use small comprehensible commits.
+Perform an explicit readability review before the final commit.
+
+Readable source is a blocking acceptance criterion. Every new or modified C/H
+file must pass the changed-file `clang-format` check; tests and fixtures follow
+the same rule. Run `tools/check_changed_c_format.sh <base-revision>` without
+formatting unrelated historical files.
+
 Canonical documents:
 
 - `README.md`;
@@ -289,6 +325,14 @@ Checkpoint history belongs in Git history and `docs/reviews`; canonical
 documents describe the current state rather than accumulating obsolete
 `NEXT` sections.
 
+Every functional change identifies the affected documentation. When relevant,
+reconcile `docs/current_state.md`, `docs/roadmap.md`, and `CHANGELOG.md`; the
+completion report lists updated documents or explains why none were affected.
+Release publication verifies both GitHub and Forgejo notes, their English
+language, and their correspondence with the exact tag independently of later
+development. A requested status in prose is never sufficient evidence for a
+`PASS` or `FROZEN` marker.
+
 ## 11. Validation
 
 Before every meaningful push:

CHANGELOG.md

@@ -1,5 +1,763 @@
 # Changelog
 
+## 0.1.6 — 2026-09-25
+
+- Corrected delayed session finalization so a heart-rate capture cannot extend
+  beyond the explicit factual session end. Android now transactionally removes
+  strict post-end BPM/RR tails while retaining an exact-cutoff sample. For an
+  already acknowledged capture, the separately versioned
+  `trainlog-heart-rate-corrections` V1 companion carries an immutable
+  `capture_id|cutoff` correction through the existing causal ledger without
+  widening frozen causal-deletions V1. Old Heart Rate V1 generation replay
+  applies that cutoff before identity comparison and cannot resurrect removed
+  measurements. A guarded dry-run recovery tool reports before/after counts and
+  statistics without rewriting published manifests or ACKs.
+- Completed the paired-device recovery for session
+  `se_fa845379-794d-4bb6-8cd3-48187ebbd134`: Android and desktop now retain
+  3,429 BPM samples and 3,429 RR values through the inclusive 11:16 cutoff,
+  and two successive full MTP generation exchanges completed with durable
+  consumed ACKs. Replaying the original 4,919-sample artifact cannot restore
+  the removed tail. Generation parent selection now excludes archived or
+  legacy acknowledgement rows lacking durable ACK evidence, while consumers
+  accept the producer's declared parent when it is one of multiple retained
+  current tips. Android Sleep V2 persistence also names medication-intake
+  columns explicitly, preserving `quantity`, note, and creation time across
+  the additive v33 layout.
+
+- Recovered a real divergent Sleep revision identity without choosing an
+  arbitrary winner. The unpublished desktop branch was re-identified with its
+  exact content, the immutable Android revision retained its published ID and
+  parent, and a fresh successor preserved the non-conflicting qualities,
+  events and medication occurrences. The original immutable generation now
+  has a `consumed` / `sqlite-commit-full` ACK and the repaired 24 September
+  session is available through Desktop and Web with its timeline, feedback,
+  cardio and Program provenance.
+- Added Desktop schema v36 and Android schema v33 append-only guards for Sleep
+  revision payloads. Both importers now reject a known historical revision ID
+  whose parent or canonical content differs, even when that revision is below
+  the current tip. A dedicated transactional recovery utility and regressions
+  cover exact replay, parent/content collisions, medication quantities,
+  rollback, immutable generation retry, and long UUID/parent chains.
+
+- Fixed Android finalization of Program-derived sessions containing a completed
+  target-only continuous occurrence. The repository now materializes the
+  performed duration from the persisted exercise timeline, including preserved
+  drafts closed by an older build, while keeping planned set counts independent
+  from valid actual sets, repetitions and loads. A strictly identity-bound
+  private recovery build may supply the factual session end; strict late
+  heart-rate BPM/RR tails are now removed transactionally at that boundary.
+- Hardened desktop Sleep generation consumption when an identical durable
+  revision has no local publication row. Content comparison now reads the
+  durable revision directly, acknowledges an exact match, and reports a real
+  revision-identity conflict instead of an empty rejection diagnostic when the
+  same ID carries different content.
+
+Development opened after the stable v0.1.5 release. The Web refinement tranche
+adds persistent French/English settings, denser shared surfaces, ISO-week
+Dashboard activity, factual exercise-count overview charts, measured-timeline
+muscle-group drill-down, normalized measurement summaries, one shared refined
+BODY ZONES silhouette, and a compact Program header. A new Equipment workspace
+lists factual references and transactionally absorbs a custom duplicate into a
+canonical identity while retaining history/MAX context and recording a causal
+deletion marker; immutable embedded drafts cause an explicit conflict.
+The post-review correction keeps acknowledged-generation capacity recoverable
+for legacy Android rows without ACK-ledger evidence, proves two successive
+Sleep-only generation/ACK exchanges, and never evicts an unacknowledged
+generation. Web can now causally remove only an orphaned zero-occurrence active
+draft while retaining protection for real active drafts. Mutation UUIDs use
+`crypto.getRandomValues()` on loopback HTTP origins. Sleep timeline geometry,
+Dashboard sizing, Program progress contrast, chart proportions, duration
+coverage messaging, and the right-aligned Settings/Sync action cluster are
+also refined.
+
+- Restored automatic Sleep-only Bluetooth synchronization after a real-night
+  trace exposed several restart and first-import gaps. The user-service
+  installer now removes only its obsolete `syncd` ExecStart override and
+  installs the RFCOMM agent;
+  Android resumes the same unsuperseded immutable generation across a new
+  conversation run and accepts its exact generation/digest ACK even though
+  the immutable ACK retains the original run identity. Ledger-proven
+  superseded branches remain retained without exhausting admission. Desktop
+  progress validation accepts the existing ACK-recovery phase, and a fresh
+  desktop can seed a non-root Sleep V2 current snapshot when its validated
+  ancestry is present. Regression
+  coverage carries medication quantity, Couché/Réveil/Levé and Sleep BPM/RR
+  through import, ACK, replay and a second Sleep-only generation with no
+  Android workout session.
+- Enriched the selected Sleep night's heart-rate chart with declared sleep
+  ranges, explicit awakening ranges and point events, medication markers that
+  preserve unit dose and quantity, exact start/end bounds, and every
+  intervening hourly tick. When no declared sleep interval exists, the Web
+  presentation alone shows the conservative bedtime +45 minutes to final
+  get-up -10 minutes estimate, labels it as estimated/non-medical, and never
+  writes it to Sleep data. Nights without synchronized HR retain these factual
+  and estimated timeline overlays without inventing BPM samples. The private
+  `trainlog.perf` deployment and read-only Firefox smoke validate the latest
+  real HR night and the latest real night containing medications from code
+  commit `2ce458d`.
+- Reused that same read-only fallback projection in the multi-night Sleep
+  agenda, with a visibly estimated hatched interval and no Sleep write. The
+  agenda now derives an exact 18:00-to-18:00 hourly grid, presents at least
+  two-hour labels on ordinary desktop widths, expands to every hour when wide,
+  and reduces to six-hour anchors on narrow screens. A read-only real-device
+  investigation of the 2026-09-23 night found no medication intake in any
+  retained local revision and established that later synchronization only
+  published the already-empty current revision. Android regression coverage
+  now proves two pre-bed intakes, including quantity two, through repeated
+  repository reopen, bedtime, wake, final get-up, generation, desktop ACK,
+  replay, stale-ancestor input and a subsequent revision. The private service
+  serves Web code commit `a60e1aa`; a non-mutating Firefox smoke on the real
+  night confirms the identical 22:50–04:04 agenda/detail projection and the
+  responsive 13/25/5-label axis densities.
+- Unified the Web Sleep agenda, selected-night HR detail, and vector PDF on one
+  temporal projection. Every structured long-awake interval remains a distinct
+  band, row selection updates the detail dates and content without persistence,
+  and preview/download export exactly the active night with observations
+  recomputed for that subset. Sleep duration now consistently sums factual
+  sleep intervals or, only when none exist, uses the displayed Couché +45 min
+  to Levé -10 min estimate minus structured awakenings; the estimate is never
+  written to SQLite.
+- Changed future Android one-tap Réveil capture from punctual `night_get_up`
+  facts to structured `long_awake` windows under the user-approved 30-minute
+  default. A repeated tap inside the window extends its end to 30 minutes after
+  the latest tap, while Levé clamps it to the factual final-get-up timestamp.
+  The policy is revisioned, undoable, and independent of BPM/RR inference.
+- Centered the Sleep agenda's hour labels inside a shared 24-column visual grid
+  and added an inclusive night-start date range for PDF preview and export.
+  The duplicate terminal `18` is removed; detail/HR night selection remains
+  independent from the report range, whose date fields now use a grouped
+  Trainlog form treatment.
+- Fixed a real Sleep agenda offset bug when revision metadata used UTC `Z` but
+  factual events used the user's local offset: the row now anchors its complete
+  18:00 axis to one factual night offset. Agenda night headings use French
+  `DD/MM/YYYY` rather than persistence-oriented ISO dates in the French UI.
+
+## 0.1.5 — 2026-09-23
+
+- Completed the Sleep Tonight readiness delta and its non-destructive private
+  vc47 rollout. Pre-bed medication now creates or
+  reuses one durable pending 18:00-to-18:00 Sleep entry; Couché appends bedtime
+  to that same stable identity, while Réveil/Levé remain unavailable before
+  bedtime. Pending quick facts are publishable through a distinct marker and
+  are not day validation.
+- Added structured per-intake medication quantity (`1..99`) in Android schema
+  v32 and desktop schema v35. The active `trainlog-sleep-diary` V2 companion
+  (`sleep-diary-v2.json`) carries quantity; frozen V1 remains readable and
+  interprets missing quantity as one. Per-unit dose/unit remain separate from
+  quantity, which is rendered in Android, Web and PDF as appropriate (for
+  example `75 mg ×2`).
+- Kept sleep HR capture factual and sample-driven: pre-bed medication alone
+  creates no capture; the first real post-Couché sample opens/reuses the
+  entry-owned capture at bedtime; Réveil does not split it; and Levé closes it
+  exactly at final get-up. A no-sensor night fabricates neither capture nor
+  sample.
+- Updated the Web Sleep agenda to render every returned night in the selected
+  period on one shared 18:00-to-18:00 axis. Row selection is navigation only
+  and shows the selected entry’s full-width HR detail. Relative measured HR
+  rises/falls use a trailing five-minute reference excluding the current
+  60-second window, thresholds of `max(10 BPM, 15%)`, and ignore gaps over
+  three seconds; labels remain descriptive and make no sleep-stage, medical,
+  or causal inference.
+
+- Added the Cardio V1 persistence/synchronization foundation. Android schema
+  v27 owns durable timestamped heart-rate captures, samples and raw RR values;
+  desktop schema v30 imports the optional `trainlog-heart-rate` V1 companion
+  transactionally. Exact generation membership is retained until a correlated
+  consumed ACK, after which those stopped captures remain local history but are
+  excluded from ordinary re-publication. Desktop/Web remain sensor consumers
+  only; Bluetooth Classic Trainlog synchronization is unchanged.
+- Added the Android Heart Rate Service diagnostic foundation. The independent
+  `0x2A37` parser covers 8/16-bit BPM, contact, energy and raw RR flags with
+  strict malformed-payload rejection. A settings diagnostic provides bounded
+  HRS-filtered and expanded BLE scans, GATT service discovery and notification
+  subscription without turning desktop/Web into sensor clients. Android 12+
+  scan/connect permissions and the Android 11-and-older scan-location boundary
+  are explicit. Real CYCPLUS H2 characterization then confirmed the standard
+  service/measurement path, Battery Service, ~1 Hz notifications and raw RR.
+- Added persistent Android heart-rate acquisition and the global `♥ BPM`
+  indicator. A validated sensor is remembered, a dedicated connected-device
+  foreground service reconnects across app restarts and Bluetooth loss, stale
+  measurements are cleared instead of displayed indefinitely, and the heart
+  uses grey/orange/green for disconnected/reconnecting/fresh states. The real
+  CYCPLUS H2 was validated through force-stop/restart and Bluetooth off/on
+  recovery on the private 0.1.5 versionCode 40 installation.
+- Added the training execution timeline used for cardio correlation. Android
+  schema v28 records explicit start/end actions for stable exercise occurrences
+  while preserving the session lifecycle `started_at`/`ended_at` as canonical
+  bounds. Only one exercise can be active; session finalization refuses an
+  unclosed occurrence. Live heart-rate samples snapshot the active `entry_id`,
+  rest intervals remain unowned, and the optional `trainlog-session-timeline`
+  V1 companion imports idempotently into desktop schema v31.
+- Added Android one-tap Sleep capture on top of the existing Sleep Diary V1:
+  Couché, active medication buttons, point Réveil events and Levé each record
+  the current timestamp in one action. A guarded short-lived Annuler creates a
+  causal compensating revision, while Corriger la nuit retains the complete
+  editor. Heart-rate acquisition links directly to the stable sleep `entry_id`
+  and closes at Levé; no return-to-sleep or sleep-stage inference is added.
+- Added the true `cardio` session type without widening frozen session
+  codecs. Android schema v29 and desktop schema v32 introduce canonical
+  `session_kind=training|max_test|cardio` while the historical
+  `session_type` compatibility column remains `training|max_test`.
+  Completed cardio sessions are excluded from `history-v4` and move through
+  the separate optional `trainlog-cardio-sessions` V1 generation companion;
+  exact replay is idempotent and identity collision with non-cardio history is
+  rejected.
+
+- Added the first versioned Cardio calibration workflow. Android schema v30 creates one reserved system exercise outside the normal exercise catalogue, starts a real cardio session and HR capture, records only measured observed peak BPM, and requires at least three minutes of recovery. +1/+2/+3 minute recovery facts accept only real samples within a bounded ten-second window; missing signal therefore remains missing instead of being backfilled from a later reconnect. Completed immutable profiles synchronize Android→desktop through `trainlog-cardio-calibrations` V1 into desktop schema v33, where the importer proves peak and recovery points against the synchronized raw HR capture before accepting them.
+
+
+- Added fresh-signal BPM-guided cardio phases. Android schema v31 stores
+  ordered phase runs against the active cardio occurrence, immutable resolved
+  BPM targets, optional exact calibration provenance, exit conditions and
+  instruction changes. The engine uses a 2 BPM hysteresis band and a 3-second
+  confirmation interval to avoid boundary oscillation; stale signal suspends
+  guidance immediately and never reuses an old BPM. Android exposes live
+  Accélère / Maintiens / Ralentis guidance during the active cardio exercise.
+  Completed runs synchronize once through `trainlog-cardio-guidance` V1 into
+  desktop schema v34. Desktop verifies cardio-session ownership, exercise
+  timeline, calibration provenance and exact raw HR evidence for instruction
+  events carrying BPM before accepting them.
+
+- Fixed live Cardio guidance after changing an already-started manual draft
+  from Training to Cardio. Draft persistence now atomically reconciles the
+  same active heart-rate capture from `session` to `cardio` without replacing
+  its identity or losing existing BPM/RR samples and sequence. A transition
+  away from Cardio remains possible before Cardio-only facts exist, but is
+  rejected once durable guidance or calibration facts would make it
+  ambiguous. Repository coverage reproduces the real ordering through an
+  active exercise and guidance event. The private vc46 re-smoke retained the
+  original capture and more than 31 existing samples across the transition,
+  then displayed a measured 92 BPM and `ACCÉLÈRE`; the Sommeil and Calibration
+  cardio screens also rendered without creating persistent data.
+
+- Added one end-to-end tomorrow-session readiness regression. A synchronized
+  Program session retains its stable session and Program identities through
+  edits, two ordered Program-derived occurrence intervals,
+  pre-exercise/inter-exercise/active heart-rate ownership, finalization,
+  full-generation publication, desktop import, replay and correlated ACK. Raw
+  observation timestamps, BPM, RR, nullable stable exercise ownership and
+  capture/session bounds are compared on both platforms without inferring
+  ownership from time overlap.
+
+- Added factual synchronized heart-rate timelines to the local Web. One bounded C17 read model and loopback GET endpoint now project raw BPM/RR measurements with canonical workout exercise intervals or Sleep Diary/medication markers. Cardio history additionally presents resolved phase targets, instruction changes and calibration peak/recovery facts. History and Sleep reuse one responsive SVG component; full-sample min/max/mean statistics remain exact while only very large chart projections retain bounded bucket extrema. No sleep stage, HRV, readiness or medical inference is added.
+
+Development opened after stable v0.1.4 release.
+
+## 0.1.4 — 2026-09-22
+
+- Added the frozen Bluetooth Classic RFCOMM synchronization transport without
+  changing full-generation business semantics. The paired deployment selects
+  Bluetooth before MTP, authenticates the configured bonded Android peer with
+  the persisted Trainlog peer identity, rate-limits reconnect noise, and keeps
+  MTP as the wired recovery transport. This transport is for Trainlog data
+  synchronization only; heart-rate sensor ingestion remains future 0.1.5 work.
+- Refreshed the Web next-session projection after synchronization and added
+  factual body-measurement trend charts through the existing bounded analysis
+  read model without introducing health interpretation or estimated metrics.
+- Fixed Program progress for sessions started from a delivered manual
+  preparation. The preparation companion now carries its stable Program and
+  Program-session provenance through Android start, finalization, restart and
+  the existing execution companion; legacy stored deliveries are safely
+  enriched only when every pre-existing field and execution identity matches.
+  Android and Web consequently present the completed session and progress from
+  the same persisted identity without fabricating history.
+  Historical acknowledged deliveries now complete that recovery on the
+  original session even when the preparation contained planned continuous
+  activities, and current sleep snapshots can initialize a fresh peer from a
+  non-root revision without discarding causal identity.
+- Aligned the Sleep Diary Agenda ticks, interval bands and point markers on one
+  exact 18:00-to-18:00 timestamp projection. Selecting another night now clears
+  the previous entry immediately, adopts only an exact-date result and rejects
+  stale out-of-order reads; an absent night remains unpersisted and empty until
+  the first real edit. The editor presents local completion as Draft,
+  Day validated or Modified without exposing synchronization transport state.
+- Fully localized the French Sleep Diary PDF without changing its canonical
+  data source or event semantics. Column headings, timeline labels, legend,
+  factual summary, draft warning, dates and plurals are now French, accented
+  text uses the PDF WinAnsi encoding, and durations use human-readable units.
+  Long awakenings remain proportional intervals between independent sleep
+  ranges, while medication intake snapshots retain localized dose and unit.
+  The English report keeps an independent English vocabulary.
+- Made the Sleep Diary Agenda a live projection of the latest locally
+  persisted entry revision. Event and intake mutations now re-read and adopt
+  the canonical Core snapshot, serialized autosaves carry the returned
+  revision forward, and stale asynchronous reads cannot regress the visible
+  state. The Agenda shows factual bedtime, final get-up, declared-sleep and
+  time-in-bed durations, long awakenings, naps, sleepiness and grouped
+  medication markers without requiring reload or publication. Medication
+  catalog entries and selectors now include their usual localized dose and
+  unit, keep same-name/different-dose records distinct, and prefill editable
+  intake doses. Schemas, domain semantics, synchronization and PDF generation
+  are unchanged.
+- Fixed the Sleep Diary Web workspace becoming entirely blank after adding an
+  event or medication intake on the loopback-routed HTTP origin. Sleep event
+  and intake UUIDv4 identities now use secure random bytes without depending
+  on the secure-context-only `crypto.randomUUID()` API, and a section-local
+  error boundary preserves the Trainlog shell if an unrelated render failure
+  occurs. The capture workspace now reuses Trainlog cards, controls, status,
+  primary/secondary/danger actions and responsive spacing for a structured
+  night header, appreciations, event timeline, medication catalog and intake
+  editor. Domain data, schemas, revisions, synchronization and PDF semantics
+  are unchanged.
+- Fixed equipment creation from the Android active-session exercise editor.
+  The selector now exposes the complete catalogue in a bounded scrollable
+  list, reuses the catalogue creation route, returns to the same stable
+  occurrence with all draft fields intact, and selects the explicitly created
+  equipment. Target-only prepared occurrences can save that equipment in
+  place without fabricating performed sets or appending a duplicate occurrence.
+- Fixed the Android active-session exercise editor for target-only continuous
+  preparation entries. Opening an occurrence now renders its prefilled form,
+  preserves its independent plan while editing performed values, updates only
+  the selected stable occurrence, and reports persistence failures instead of
+  displaying a false editor-opened confirmation.
+- Fixed Android activation of mixed session preparations containing continuous
+  duration targets and set-based exercises. Continuous target metadata now
+  remains planning-only, SQL `NULL` set counts round-trip correctly, and no
+  performed continuous activity or set is created before user capture.
+- Added Sleep Diary V1 across desktop schema v29, Android schema v26, Analyse,
+  full-generation synchronization and a deterministic local vector PDF agenda.
+  Entries retain causal revisions, absolute timestamped events, the five-value
+  appreciation scale and user-authored notes; no medical interpretation or
+  heart-rate data is introduced. Sleep Diary also includes a revisioned local
+  medication catalog and timestamped intake snapshots with optional positive
+  dose/unit, synchronized and rendered factually in the agenda and PDF without
+  efficacy, interaction, causality, dosage, or clinical advice.
+  Progressive daily capture now persists every edit locally while keeping
+  draft, ready, synchronized, and post-sync modified states distinct. Explicit
+  validation publishes only the guarded current revision through the existing
+  full-generation/ACK path; validation never makes a day immutable.
+
+Development opened after stable v0.1.3 release.
+
+- Implemented the loopback-only Web Analyse V1 workspace and shared bounded
+  Core read model. The 7/30/90-day and all-history filters, factual activity,
+  active-Program progress, compatible exercise metrics, explicit persisted
+  MAX results, primary BODY ZONE exposures, and fourteen body measurements are
+  calculated by the C17 backend. Dashboard summaries consume the same model
+  while preserving all existing tile identities and layout behavior. Deep
+  links, safe query fallbacks, null/empty states, French/English presentation,
+  keyboard focus, and responsive charts are covered without estimating 1RM,
+  readiness, fatigue, recovery, body fat, or performance.
+- Refined the Analyse V1 and Dashboard presentation without changing their
+  read models or API contracts. Period controls now share the section toolbar;
+  durations use the shared human-readable formatter; incompatible exercise
+  metrics remain hidden; activity, exercise, and measurement charts expose
+  chronological dates, units, and factual tooltips; BODY ZONE silhouettes and
+  exposure comparisons are more legible; and active-Program summaries use a
+  compact structured progression layout. Persisted Dashboard tile identities
+  and layout behavior remain unchanged.
+
+## 0.1.3 — 2026-09-20
+
+- Decoupled the Android full-generation request from the strict legacy V3
+  compatibility signal. One explicit intent now publishes the dedicated
+  `trainlog-sync-full-generation-request-v1.json` channel first; the legacy
+  request is published with the same identity only after a fresh V3 snapshot
+  succeeds. The desktop daemon prioritizes this channel and durably
+  deduplicates a bounded set of request identities across both channels.
+
+Development opened after the stable v0.1.2 release.
+
+- Made explicit Android synchronization intent authoritative over automatic
+  background resumption. A process-wide conversation arbiter now yields an
+  older background wait before the foreground publishes its fresh request
+  UUID, and `NEW_EXPLICIT` ignores the request/run that existed before the
+  click. Background USB and Drive workers classify new requests, new
+  correlated remote evidence, legitimate handoff, and stale resumable state;
+  terminal runs are no longer retried every five seconds without new proof.
+  Durable generations are retained across yield and handoff, and desktop
+  request-ID deduplication remains strict. No schema, protocol, causal rule or
+  exchange format changed.
+
+- Hardened direct-MTP full-generation conversations after a private Android
+  run was frozen before generation capture. Android now emits bounded
+  run/phase metadata, refreshes the user-enabled background listener before a
+  foreground request, and confirms MediaProvider/MTP visibility for immutable
+  generation objects before publishing their reference. Desktop MTP pulls are
+  throttled to one complete refresh every three seconds, keep a separate
+  30-second operation budget, and report expiration of the conversation as a
+  correlated protocol timeout instead of a misleading final one-second
+  transport timeout. Explicit requests continue to receive fresh UUIDs.
+  Mensurations now retains two compact columns at the deployed phone's 312 dp
+  content width, with a narrow/large-font fallback. Schemas, causal semantics,
+  generation formats, ACK formats and standalone V3 strictness are unchanged.
+
+- Routed Android foreground and daemon-triggered daily synchronization through
+  the existing full-generation orchestrator whenever its trusted local
+  configuration is present. The standalone mobile V3 importer remains strict
+  and still rejects causally protected live replay; complete generations apply
+  tombstones before filtering dominated snapshot facts. No schema, exchange
+  format, causal rule, or synchronization protocol changed. Android backup
+  manifests now obtain `product_version` from installed package metadata
+  instead of retaining the historical `0.1.2` literal.
+
+- Unified the Android capture interface around compact dark cards, action
+  tiles, restrained-radius button variants, wrapping selection grids, and
+  two-column performed-set entry. Home now focuses on session capture, recent
+  BODY ZONES exposure, synchronization, and measurements; mobile Statistics
+  navigation was removed without changing stored data or exchange contracts.
+  Programs now show compact session metadata, completed progress, and explicit
+  start/resume/completed states using the existing schema-v25 durable Program
+  execution provenance. Web Program administration gained adaptive cards, a
+  visible progress bar, and green completed-session treatment while retaining
+  its revision-guarded trash confirmation and causal deletion behavior.
+  Android full lint remains at the exact ten-error `main` baseline (one
+  `NewApi`, one `LocalContextConfigurationRead`, and eight bilingual
+  `StringFormatMatches` diagnostics); this lot adds no lint error and disables
+  no rule. Private daily candidates retain development `versionName=0.1.3` and
+  may override only an increasing `versionCode` at build time.
+
+- Added the loopback-only `/exercices` desktop catalogue administration
+  surface with bounded search/profile/BODY ZONES filtering, detail and
+  read-only equipment presentation, Core-owned creation and editing, complete
+  optimistic concurrency, and protected causal retirement. Profile changes
+  preserve stable exercise IDs and all historical occurrence snapshots.
+  Mutations remain desktop-local until the existing USB-priority, Drive
+  mirror/fallback synchronization publishes the existing catalogue companions;
+  no Android code, schema, exchange format, or automatic synchronization was
+  added.
+
+## 0.1.2 — 2026-09-20
+
+- Added USB-priority full-generation synchronization with a separately
+  configured private Drive mirror/fallback transport, verified manifest-last
+  publication, shared multi-transport identities/ACKs, and explicit per-
+  transport Web status without ever transporting SQLite.
+- Added an Android user-enabled foreground USB listener, private Drive folder
+  connection with bounded WorkManager checks, and one shared concurrency-
+  guarded generation coordinator for UI and background triggers.
+- Added an accessible preparation-list send action with separate editing and
+  delivery states, durable retry behavior, duplicate-delivery prevention and
+  stable execution-identity transition from Preparation to History/Program
+  completion.
+
+- Implemented `TRAINLOG_PROGRAM_CALENDAR_V1` as the operational top-level
+  `/programmes` daily active-Program calendar. It consumes typed Core reads and
+  preparation creation, derives Monday–Sunday weeks from Program bounds and
+  real planned dates without inventing rest days, keeps undated sessions
+  separate, and rereads Core state after Prepare. Sessions → Programmes remains
+  the administration/import/list/detail/archive/delete surface; this adds no
+  Core, API, schema, format, synchronization, or Android changes.
+
+- Fixed Program-to-preparation creation for Program V1 target weights written
+  as integer JSON numbers. Imports now preserve both integer and real number
+  spellings instead of persisting integer weights as zero. Existing affected
+  Programs remain unchanged; when deriving an editable draft, an impossible
+  legacy zero weight is represented as an unspecified target rather than
+  blocking the entire preparation. Mixed continuous-duration, unloaded-reps,
+  and externally loaded reps coverage verifies order, targets, provenance,
+  zero delivery/execution side effects, readable detail, and request replay.
+
+- Fixed the Web history deletion failure for Program-origin completed
+  sessions. The history detail query now reads explicit MAX results from
+  `max_results`; mobile history import seeds a deterministic causal live
+  revision when one is missing; and desktop schema v28 gives durable Program
+  execution provenance an explicit terminal `deleted` state. Deletion remains
+  revision-guarded, atomic and replay-safe. Retained Program-execution
+  generations cannot resurrect a causally deleted session, and Web errors now
+  distinguish stale, absent, invalid and internal failures without exposing
+  database details. The private rollout additionally fixed complete-generation
+  dominance for occurrence equipment companions and made bounded ACK recovery
+  prioritize recent terminal evidence. Two correlated direct-MTP exchanges,
+  component restart and exact replay of a retained pre-deletion generation
+  preserved the single tombstone without duplication or resurrection.
+
+- Added the Program execution flow. Android schema v25 can start or resume one
+  Program session through the existing durable singleton, preserves stable
+  Program provenance on completion, and presents explicit `À faire`, `En cours`
+  and `Effectuée` states. Desktop schema v27 stores the corresponding unique
+  execution link. The optional `trainlog-program-executions` V1 full-generation
+  companion advances Web Program sessions from persisted facts without changing
+  mobile export V3, `programs-v1`, or `TRAINLOG_FORMAT_V1`. Web also exposes
+  `À faire`, `Préparée`, `En cours`, and `Effectuée` session states, while the
+  existing logical Program deletion and confirmation semantics remain intact.
+  The coordinated private deployment advanced the daily Android installation
+  from versionCode 16/schema v24 to versionCode 17/schema v25 and desktop from
+  schema v26 to v27 without uninstalling, clearing, or losing user data. A
+  disposable Program session was started, resumed, completed, synchronized and
+  displayed as completed on Android and Web. Correlated ACKs, a second
+  idempotence exchange, store/component restart, exact old-generation replay,
+  causal Program deletion, tombstone acknowledgement and non-resurrection all
+  passed while the real 24-session/164-entry Program remained unchanged.
+
+- Completed the private coordinated deployment of
+  `TRAINLOG_PROGRAMS_PRESENTATION_ANDROID_DELETE_V1`. Desktop schema v26 adds
+  terminal logical Program deletion with
+  request/deleted revisions, durable response replay, generation linkage and
+  acknowledgment state; source definitions and derived preparations remain,
+  while deleted Programs cannot resurrect or prepare. The responsive Sessions
+  Programs cards/timeline now use imported/session/usage/provenance data and
+  protect a discrete accessible trash confirmation with focus restoration and
+  Escape/Cancel no-op behavior. Android schema v24 adds the read-only synced
+  Programs list/detail projection. The optional staged controlled-generation
+  `trainlog-programs` V1 (`programs-v1.json`) publishes nondeleted Programs and
+  unacknowledged tombstones under capability `programs-v1`; it changes neither
+  `TRAINLOG_FORMAT_V1`, mobile V3, catalog exchange, nor preparations. Real
+  Firefox Programs screenshots and real rollout evidence are recorded in
+  `docs/reviews/programs_presentation_android_delete_v1_evidence.md`. The
+  signed private Android update advanced versionCode 15 to 16 without
+  uninstall or data clearing. A real disposable Program tombstone was consumed
+  and acknowledged, and a final correlated exchange after component restart
+  proved persistence, idempotence, and non-resurrection.
+
+- Completed the private grouped rollout of Web Sessions deletion and Program
+  V1 from desktop source `a0fc48f082b76dba2ae3a56fceb492169de89f89`.
+  Desktop migrated from schema v24 to v25 after backup, restoration, and
+  copy-migration verification. Android was updated in place to private
+  versionCode 15 with no uninstall or data clearing; the installed APK is
+  non-debuggable and retains the daily-installation certificate. Exact
+  pre/post-update logical comparison preserved all 46 Android tables and 1,023
+  rows. A preparation created explicitly as disposable was withdrawn through
+  the real 390×844 confirmation UI. Two full-generation exchanges around a
+  Trainlog-only restart retained exactly one Android withdrawal result, no
+  matching delivery or performed session, and no resurrection or duplication.
+
+- Completed Web Sessions deletion and Program V1 on desktop schema v25. Separate
+  revision-guarded Core commands now withdraw manual preparations and AI
+  proposals or causally delete inactive execution drafts and selected completed
+  sessions. The accessible trash confirmation preserves derived preparations,
+  active/concurrent drafts and unrelated performed history; proposal withdrawals
+  use the bounded `trainlog-ai-session-drafts` V2 tombstone extension to prevent
+  legacy replay resurrection on Android.
+
+- Added Programs as the fourth Sessions subtab with complete paged listing,
+  search/state filtering, stable detail links, archival, strict bounded
+  `trainlog-program` V1 import preview and transactional commit. An explicit
+  program-session action creates a distinct provenance-bearing manual
+  preparation without automatic Android delivery or performed data.
+
+- Completed the controlled Web Sessions presentation/withdrawal rollout on the
+  paired private installation. Desktop migrated from schema v23 to v24 and
+  Android from v22 to v23 without clearing application data. The requested
+  validation preparation was withdrawn once; Android reported
+  `execution_preserved` because its delivery had already started. Two
+  post-withdrawal direct-MTP generations around component restart proved no
+  resurrection or duplication while preserving the source proposal and all
+  actual workout data.
+
+- Fixed a rollout-discovered stale peer-advertisement failure in the
+  full-generation MTP worker. Each MTP run now requires one successful pull
+  from the expected phone before validating peer identity and capabilities, so
+  a retained pre-upgrade advertisement cannot reject a compatible upgraded
+  Android peer.
+
+- Corrected Web Sessions presentation with one descending cross-type order,
+  strict civil-date and zoned-timestamp formatting, contextual French states,
+  readable persisted proposal provenance, and an installation-local versioned
+  French/ISO date preference. The Dashboard prepared-item list, Footer, charts
+  and synchronization timestamps use the same presentation helpers without
+  changing machine values.
+
+- Added revision-guarded, idempotent **Delete preparation** through the Core
+  service and protected loopback API. Desktop schema v24 retains an immutable
+  withdrawal ledger and all preparation/delivery evidence. The separate
+  `trainlog-session-preparations` V2 generation participant propagates exact
+  withdrawals; Android schema v23 cancels only pending deliveries, preserves
+  started executions and permanently prevents older delivery replay from
+  resurrecting a withdrawn preparation. V1 remains readable and
+  `TRAINLOG_FORMAT_V1` is unchanged.
+
+- Implemented `TRAINLOG_WEB_SESSIONS_V1` with paged preparation, resume and
+  history views, stable details, optimistic/idempotent manual preparation,
+  explicit proposal derivation, desktop schema v23, Android schema v22 and the
+  separate `trainlog-session-preparations` V1 generation participant.
+
+- Completed the controlled Sessions V1 deployment and delivered a six-entry
+  validation preparation to Android without starting it or replacing an active
+  draft. Foreground generation retries now emit a fresh daemon request and
+  resume the exact interrupted generation until both peer halves are durable,
+  preventing false transport timeouts and duplicate recapture.
+
+- Added compatible non-destructive generation archival on desktop schema v22
+  and Android schema v21. Only exactly acknowledged generations older than the
+  two active recovery tips leave admission after a verified durable payload
+  copy and audit record; all identities, manifests, ACKs, lineage and causal
+  evidence remain stored. Older Android stores can recover exact missing
+  producer-side ACK rows from the desktop consumer's durable ledger, with
+  strict run, peer, generation and manifest revalidation. A correlated Android
+  capacity error now reaches the Web without waiting for a transport timeout,
+  and the prepared-items tile can inspect every proposal rather than only its
+  first compact summary.
+
+- Completed the controlled schema-v22/schema-v21 rollout without uninstalling
+  or clearing Android data. The production Android archive uses a supported
+  post-rename file durability barrier on emulated external storage, and the
+  desktop publishes each complete MTP generation before its correlated
+  reference. Two real post-migration bidirectional exchanges, separated by a
+  Trainlog-service restart, completed with durable ACKs and no session
+  duplication. The expected AI proposal retained its identity, six entries,
+  and `pending` state on Android and remained independently visible in Web.
+
+- Fixed a production full-generation timeout caused by recursively uploading
+  retained staging and unrelated transport history on every MTP push. Each
+  phase now publishes a private bounded outbox containing only its request,
+  ACK, and current referenced generation, while preserving every retained
+  generation, tombstone, and causal proof. Transport expiry has a stable
+  browser-facing code and action instead of a truncated traceback.
+  The reciprocal pull now reads only current coordination objects and the
+  exactly referenced Android generation instead of recursively mirroring
+  retained Android and desktop history.
+
+- Replaced the Web Next Session placeholder with a separate read-only Core
+  projection that distinguishes AI proposals from active/pending execution
+  drafts without redefining the frozen Dashboard field or counting targets as
+  performed work. The browser preserves the last successful durable view
+  across refresh failures and uses one abortable, per-run ordered sync poller.
+
+- Completed the authorized private full-generation rollout over production
+  direct MTP: verified Android and desktop backups, signing-preserving Android
+  updates, schema migrations, persistent peer pairing, bidirectional durable
+  ACKs, restart and idempotent replay. This did not publish a release or modify
+  v0.1.1.
+
+- Fixed rollout-discovered feedback idempotence across SQLite row modes,
+  packaged the complete generation exporter closure, ignored stale Android
+  coordination objects until their run/generation correlation matches, and
+  made the Android screen report completed generation conversations instead of
+  waiting for a legacy receipt.
+
+- Packaged `trainlog-sync-once` and `trainlog-syncd` with the relocatable sync
+  candidate so user services cannot mix a versioned install with live-checkout
+  helpers during rollout.
+
+- Added a bounded Android package-version override and made the schema-v17
+  backup bridge produce a signed release APK, allowing a strictly increasing
+  private update chain without changing Trainlog schemas or protocols.
+
+- Generalized bridge restore/migration validation to preserve every historical
+  SQLite value whether a real backup contains an active draft or legitimately
+  contains none.
+
+- Made relocatable launchers resolve stable user-bin symlinks to their physical
+  versioned bundle before loading matching binaries and helpers.
+
+- Made the Web sync button generate cryptographic UUIDv4 request IDs on the
+  loopback HTTP hostname where `crypto.randomUUID()` is unavailable.
+
+- Included the exercise-name and training-knowledge modules required by the
+  packaged generation worker, with an isolated runtime-import regression.
+
+- Closed the native candidate warning gate with checked path and HTTP response
+  bounds, strict GCC and Clang builds, full Clang ASan/UBSan validation, and a
+  stable concurrent object-I/O MTP double. Rebuilt the desktop, current Android
+  and non-installed schema-v17 bridge candidates with recorded digests; no
+  service, device, user database, signing secret or deployment was touched.
+
+- Normalized the recent synchronization, generation-MTP, Android backup,
+  Web Dashboard serialization, tests, I/O doubles and packaging code for human
+  readability. Added scoped C formatting rules and review guidance without
+  changing synchronization protocols, assertions, deployment state or runtime
+  behavior.
+
+- Added the production libudev/libmtp generation adapter with bounded peer
+  selection, object transfer and manifest-last publication; wired the trusted
+  orchestrator mode and proved the full Firefox/Android/desktop conversation
+  with an I/O-boundary object double. Added complete versioned Android
+  backup/verify/restore and a reproducible, non-installed schema-v17 bridge
+  candidate with v17 round-trip and v17-to-v20 migration tests. Physical MTP,
+  signing, device installation, user-data operations and rollout remain
+  pending.
+
+- Added opt-in foreground generation coordination, peer-evidenced capabilities,
+  truthful bounded Web progress, descendant cleanup, an integrated Android ↔
+  desktop Firefox proof, and synthetic candidate/SQLite recovery tooling on the
+  development branch. Physical MTP and deployment remain pending.
+
+- Completed the grouped `TRAINLOG_SYNC_WEB_END_TO_END_V1` mission: the opt-in
+  full-generation orchestrator, protected asynchronous Web API, global sync
+  control, durable reconnect reporting, Dashboard refresh and read-only draft
+  summary pass isolated C, Python, Android, frontend and Firefox validation.
+  Default V3, physical MTP, Drive and deployment remain unchanged.
+
+- Completed `TRAINLOG_SYNC_GENERATION_ACK_V1` with desktop schema v21 and
+  Android schema v20. Added coherent per-platform capture, strict bounded
+  manifest V1, immutable manifest-last publication, whole-generation SQLite
+  consumption, pair-scoped lineage, durable consumed/rejected ACK V1 replay,
+  and a separate causal-operation publication ledger. Real isolated Android →
+  desktop and desktop → Android chains use production entry points and retain
+  operation identity across generations. Automatic V3/MTP selection and all
+  operational services remain unchanged.
+
+- Completed the residual causal-deletion evidence with real Android and
+  desktop producers for exercise, body-observation, custom-equipment, feedback
+  and BODY ZONE relation targets, including production replica exchange,
+  retained-history/current-reader checks, reopen/replay and stale-companion
+  refusal.
+
+- Closed the causal-deletion correctness review: deletion predecessors now
+  cover affected session children, measurements, links, notes and immutable
+  feedback revisions; supported corrections preserve an intervening mutation
+  marker even after a content revert. Imported operations share built-in
+  authorization with local deletion, execution drafts use their stable
+  cross-platform revision identity, protected legacy companions refuse unsafe
+  replay, and causal artifact reads/exports enforce count and byte bounds
+  before destructive effects.
+
+- Completed `TRAINLOG_SYNC_CAUSAL_DELETE_V1` with desktop schema v20 and
+  Android schema v19. Added a strict bounded staged causal-deletion artifact,
+  durable operation/state records, domain-specific deletion effects, causal
+  conflict and replay handling, and legacy snapshot non-resurrection gates.
+  Android and desktop both produce and consume the artifact in isolated tests;
+  automatic transport, generation acknowledgement and deployment remain
+  inactive.
+
+- Completed `TRAINLOG_SYNC_DATA_LIFECYCLE_V1` with desktop schema v19 and
+  Android schema v18. Added explicit staged V4 enriched-history codecs,
+  causal notes, body-observation session links, stable execution-draft
+  identities, bounded pending drafts, explicit activation and atomic,
+  idempotent finalization with stale-replay protection. Active synchronization
+  remains V3; no service, user database, phone, tag or release artifact was
+  changed or deployed.
+
+- Closed the lifecycle validation evidence with real Android/desktop V4
+  history and execution-draft round trips in both producer directions. Fixed
+  Android V4 import so validated target, load, and rest fields are persisted,
+  reconciled the 73/75 native count to the two `web=auto` frontend tests, and
+  documented identical pre-existing GCC 16 `-Wmisleading-indentation`
+  failures on baseline and branch while retaining Clang 22 strict green
+  builds. V4 remains staged and inactive.
+
+- Completed `TRAINLOG_SYNC_CHARACTERIZATION_V1` without changing production
+  synchronization, schemas, or formats. Added a real Android V3 exporter →
+  desktop importer/exporter → fresh Android importer round trip, and completed
+  current-behavior evidence for stable identities, occurrence/set ordering,
+  exact replay versus correction, local-only field handling, inter-artifact and
+  delete-before-send partial failure, request/receipt replay and marking, and
+  contention on the real private-XDG synchronization lock. V4, draft transport,
+  general tombstones, coherent generations, causal merge, and durable peer
+  consumption acknowledgement remain future work.
+
+- Reconciled canonical documentation with the implemented 0.1.2 development
+  state, kept v0.1.1 and future synchronization scope explicit, established
+  English as the repository documentation/release-note language, and added a
+  reusable tag-scoped English source for the v0.1.1 public notes. No production
+  behavior, schema, format, service, tag, or release asset changed.
+
+- Completed `TRAINLOG_SYNC_TEST_ENV_V1` without changing production behavior,
+  schemas or formats. `tools/validate_sync_isolated.py` now validates JDK 17 and
+  the effective Gradle JVMs, creates unique private HOME/XDG/native/JVM tmp,
+  exchange, database and report paths, runs bounded preflight/smoke/full suites,
+  counts Android XML results, propagates failures and interruptions, and cleans
+  only its owned successful run. Unit and Robolectric coverage proves bounded
+  cleanup, distinct runs, process termination, no default real transport and
+  effective `java.io.tmpdir` propagation.
+
+- Froze `TRAINLOG_SYNC_GAP_CONTRACT_V1` without changing production sync,
+  schemas or published formats. The contract distinguishes current evidence
+  from future behavior and defines domain ownership, active-draft lifecycle,
+  lost fields, causal deletion, conflicts, coherent generations, verified
+  consumption/acknowledgement, compatibility, reporting, a future Web service
+  boundary and dependency-ordered implementation lots. Added isolated
+  production-path characterization of V3 field loss, snapshot resurrection and
+  per-artifact rollback; existing Android coverage remains the proof of draft
+  exclusion followed by finalized-session export.
+
+- Development opened after the stable `v0.1.1` release. The complete Web
+  Dashboard is now `WEB_DASHBOARD_V1=PASS/FROZEN`; Analyse, Programmes,
+  Sessions, and Exercises remain placeholders. The current operational cursor
+  is `TRAINLOG_SYNC_CHARACTERIZATION_V1`; its future protocol work has not
+  started.
+
 ## 0.1.1 — 2026-09-16
 
 - Completed `TRAINLOG_ANDROID_FIELD_INPUT_REFINEMENT_V1`: active and completed

README.md

@@ -1,243 +1,124 @@
-# Trainlog
+<p align="center">
+  <img src="docs/assets/trainlog-banner.svg" alt="Trainlog — local-first training data system" width="100%">
+</p>
 
-Trainlog is a local-first workout and body-data system. Trainlog Core owns
-business truth and canonical desktop persistence. Its native Android app is the
-field companion, its C17/Notcurses desktop TUI is the administration and
-technical surface, and its documented future local Web sibling is the analysis,
-visualization, and program/session-preparation surface.
+<p align="center">
+  <img src="docs/assets/trainlog-badges.svg" alt="Trainlog badges: local-first, C17, Android, local Web, GPLv3" width="720">
+</p>
 
-Android and desktop each own a local SQLite database. The desktop database is
-the canonical long-term history. Trainlog synchronizes versioned JSON artifacts
-over direct MTP; it never copies SQLite database files between devices.
+Trainlog is a **local-first system for recording, synchronizing, and examining
+training and body data**. Its Android companion handles capture in the field;
+the C17 desktop core keeps the canonical long-term history; a keyboard-first
+Notcurses TUI and a loopback-only Web application provide complementary ways
+to inspect and manage it.
 
-## Product split
+The system is built around explicit facts, stable identities, versioned JSON
+exchanges, and user-controlled storage. Plans never become performed work until
+they are actually recorded, continuous activities are not disguised as sets,
+and estimates are kept distinct from measurements.
 
-| Surface | Primary responsibility |
-|---|---|
-| Android | Capture and quickly correct sets, repetitions, loads, durations, and continuous activities; reorder active and completed-session occurrences; capture feedback, J+1 follow-ups, body measurements, and AI proposals; trigger sync; show quick summaries. |
-| Desktop TUI | Administer, inspect, maintain, import/export, correct canonical history, and provide technical tools. |
-| Local Web (planned) | Analyze and visualize canonical data; prepare programs and sessions through typed Trainlog Core services. |
+> **Release line:** The latest stable release is
+> [`v0.1.6`](https://github.com/labfytools/trainlog/releases/tag/v0.1.6).
 
-No interface reconstructs business truth from SQLite tables. The local Web is
-a sibling adapter, not an extension of the TUI; `TRAINLOG_WEB_V1` is currently
-contract-only and has no implementation.
+## ✦ Showcase
 
-## Releases
+<p align="center">
+  <img src="docs/reviews/evidence/sleep-diary-alignment-firefox.png" alt="Trainlog Web Analyse workspace showing the Sleep Diary agenda and factual heart-rate timeline" width="100%">
+</p>
 
-When a Trainlog release is published, its prebuilt assets are available from
-both official mirrors:
+<p align="center"><sub>Web Analyse in Trainlog 0.1.6 — synchronized Sleep facts and measured heart-rate data on one timeline.</sub></p>
 
-- [GitHub Releases](https://github.com/labfytools/trainlog/releases)
-- [Forgejo Releases](https://git.labfytools.com/fy59/trainlog/releases)
+The repository currently tracks real-browser evidence for the Web interface.
+Its Android overview asset is a clearly labelled static design study with
+fictional data, not a runtime screenshot; no current TUI screenshot is tracked.
+Those assets are therefore not presented here as product captures.
 
-Each published stable release provides:
+## ✦ Features
 
-- a signed Android APK;
-- a Linux x86-64 TUI executable;
-- SHA-256 checksums.
+| Area                 | Available in the current development tree                                                                                                                                                     |
+| -------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| **Training capture** | Metadata-driven sets, repetitions, durations and continuous activities; heterogeneous actual sets; durable active draft; exercise timelines; explicit measured MAX results.                   |
+| **Planning**         | Manual preparations, imported Programs, Android delivery, execution provenance and strict separation between targets and facts.                                                               |
+| **Context**          | Exercise and equipment catalogues, BODY ZONES, body measurements, immediate feedback, wording revisions and J+1 follow-ups.                                                                   |
+| **Cardio**           | Android BLE heart-rate acquisition, factual BPM/RR history, cardio sessions, measured calibration and fresh-signal phase guidance.                                                            |
+| **Sleep**            | One-tap Android capture, causal Sleep Diary revisions, medication occurrences, synchronized factual timelines and local vector PDF export.                                                    |
+| **Desktop**          | C17 Core, canonical SQLite history, keyboard-first Notcurses administration, correction, statistics, graphs and synchronization diagnostics.                                                  |
+| **Local Web**        | Loopback-only Dashboard, Analyse, Programmes, Sessions, Exercises, Equipment, Settings and synchronization surfaces backed by typed Core services.                                            |
+| **Synchronization**  | One generation/ACK business engine over authenticated Bluetooth Classic RFCOMM, direct USB/MTP recovery and a separately configured private Drive workflow; SQLite files are never exchanged. |
 
-Both mirrors publish the same Trainlog product version and release assets. The
-implemented product version is **0.1.1** on Android and desktop; this is one
-shared Trainlog version, not separate interface versions. Version 0.1.1 is the
-current stable release.
+### Boundaries and work in progress
 
-Version 0.1.1 presents Trainlog in French by default, with English selectable
-from **Settings → Language** on Android and the desktop TUI. The selection is
-local to that installation and updates the visible interface immediately; it
-does not translate user exercise/catalogue names or change training data,
-stable IDs, databases, schemas, exchange artifacts, synchronization protocols,
-AI, MAX, or feedback. Synchronization status is rendered locally from typed
-status and counters; raw protocol and operational summaries are not translated
-or injected into the other surface.
+- `TRAINLOG_FORMAT_V1` remains frozen. The active mobile snapshot is V3; V1
+  and V2 remain readable, while V4 codecs are staged but not selected by the
+  active transport.
+- Full-generation synchronization is deployed only behind a trusted local
+  opt-in; the default automatic exchange remains V3.
+- AI history export is active. AI session proposals still have a pending real
+  Drive plus Android-triggered bidirectional smoke test.
+- Session Generator V1 is implemented but hidden while the V2 planning model
+  is developed.
+- Web Analyse is implemented; its recorded visual-review gate remains open.
 
-See the [documentation](docs/README.md) and [changelog](CHANGELOG.md) for more
-details.
+The canonical status and limitations live in
+[`docs/current_state.md`](docs/current_state.md); future work belongs in the
+[`roadmap`](docs/roadmap.md).
 
-## Installation
-
-### Download a prebuilt release
-
-For a published release, download Trainlog from either official mirror:
-
-- [GitHub](https://github.com/labfytools/trainlog/releases)
-- [Forgejo](https://git.labfytools.com/fy59/trainlog/releases)
-
-Both mirrors contain the same Android APK, Linux x86-64 TUI binary, and SHA-256
-checksums for each stable Trainlog release. Verify the downloaded binaries
-against `SHA256SUMS` before installing them.
-
-The Linux TUI artifact is architecture-specific and dynamically linked. It is
-not a universally portable Linux binary: the host must provide compatible
-runtime libraries listed under [Dependencies](#dependencies).
-
-```bash
-chmod +x trainlog-tui-linux-x86_64-v<version>
-./trainlog-tui-linux-x86_64-v<version>
-```
-
-The executable can remain in the download directory. Moving it into a directory
-on `PATH`, such as a user-managed `~/.local/bin`, is optional.
-
-For Android, download the release APK, allow installation from the browser or
-file manager when Android requests it, and install the package. Android 8.0
-(API 26) or later is required. Grant Trainlog all-files access only when direct
-`Documents/Trainlog` synchronization is needed. Desktop synchronization also
-requires the Linux side and its MTP dependencies to be installed and configured.
-
-Android and the TUI in each stable release share the same Trainlog product
-version on both mirrors. Database schemas and JSON protocol versions are
-independent.
-
-### Build from source
-
-Desktop:
-
-```bash
-meson setup build
-meson compile -C build
-meson test -C build --print-errorlogs
-```
-
-Android:
-
-```bash
-cd android
-JAVA_HOME=/usr/lib/jvm/java-17-openjdk ./gradlew test
-JAVA_HOME=/usr/lib/jvm/java-17-openjdk ./gradlew assembleRelease
-```
-
-`assembleRelease` produces a distributable stable APK only when release signing
-is configured by the release operator. The repository does not contain signing
-credentials and does not silently generate them.
-
-Release hosts provide `TRAINLOG_RELEASE_STORE_FILE`,
-`TRAINLOG_RELEASE_STORE_PASSWORD`, `TRAINLOG_RELEASE_KEY_ALIAS`, and
-`TRAINLOG_RELEASE_KEY_PASSWORD`, or a private
-`~/.config/trainlog/release-signing.properties` file containing the equivalent
-`storeFile`, `storePassword`, `keyAlias`, and `keyPassword` keys. Environment
-variables take precedence. Keystores and local credential files are ignored by
-Git; neither belongs in source control, build logs, or release notes.
-
-The Android release key is the permanent update identity for the application.
-The release operator must preserve an encrypted external backup of both the
-keystore and its credentials. Losing either prevents future compatible Android
-updates; generating a replacement key is not a normal release procedure.
-
-## Dependencies
-
-### Linux runtime dependencies
-
-The published x86-64 TUI is dynamically linked. The current build directly
-requires compatible versions of:
-
-- glibc and the GCC support runtime;
-- SQLite 3;
-- libuuid;
-- utf8proc;
-- libudev;
-- libmtp;
-- Notcurses Core;
-- the standard math library.
-
-Distribution packages may pull additional transitive libraries, including
-libusb, ncursesw, unistring, gpm, libgcrypt, libgpg-error, and libdeflate.
-Package names and ABI versions vary by distribution; inspect the release's
-`ldd` evidence and install packages from the target distribution rather than
-assuming one universal package command.
-
-### Optional runtime and integration dependencies
-
-- Android is optional when using the desktop TUI alone. USB/MTP synchronization
-  requires the Android companion, libudev, libmtp, and an unlocked connected
-  device.
-- `trainlog-syncd` installation expects a systemd user session. Manual TUI
-  synchronization does not require the user service.
-- `rclone` is required only for automatic AI history upload and Drive
-  inbox/archive workflows. Core capture, local history, analytics, and direct
-  MTP synchronization work without `rclone`.
-
-### Build dependencies
-
-Desktop builds require:
-
-- Meson and Ninja;
-- a C17 compiler toolchain;
-- `pkg-config`;
-- Notcurses Core development headers;
-- SQLite, libuuid, utf8proc, libudev, and libmtp development headers;
-- Python 3 for generated sources, validators, import/export helpers, and tests.
-
-Android builds require JDK 17, an Android SDK supporting the configured API
-levels, and the Gradle wrapper committed in this repository. People installing
-the APK do not need Java, Gradle, or the Android SDK.
-
-## Documentation
-
-| Topic | Document | Purpose |
-|---|---|---|
-| Documentation map | [docs/README.md](docs/README.md) | Canonical index and ownership map. |
-| Current state | [docs/current_state.md](docs/current_state.md) | Current implemented schemas, capabilities, validation, and limitations. |
-| Architecture | [docs/architecture.md](docs/architecture.md) | Component, storage, process, and ownership boundaries. |
-| Android | [docs/android.md](docs/android.md) | Field-companion behavior and local persistence. |
-| Desktop TUI | [docs/tui.md](docs/tui.md) | Notcurses workflows, correction, and analytics. |
-| Database | [docs/database.md](docs/database.md) | Desktop persistence schema and migration contracts. |
-| Exercise model | [docs/exercise_data_model.md](docs/exercise_data_model.md) | Exercise, occurrence, load, and MAX semantics. |
-| Synchronization | [docs/sync_exchange.md](docs/sync_exchange.md) | Active MTP flow and companion artifacts. |
-| Exchange formats | [docs/exchange_format.md](docs/exchange_format.md) | Frozen and separately versioned JSON contracts. |
-| Training feedback | [docs/training_feedback.md](docs/training_feedback.md) | Immediate feedback, revisions, and J+1 follow-ups. |
-| Tests | [docs/tests.md](docs/tests.md) | Durable validation commands and coverage strategy. |
-| Roadmap | [docs/roadmap.md](docs/roadmap.md) | Current cursor and future work only. |
-| Development contract | [AGENTS.md](AGENTS.md) | Repository invariants and contribution rules. |
-| Change history | [CHANGELOG.md](CHANGELOG.md) | Chronological implementation history. |
-
-## Architecture overview
+## ✦ Architecture
 
 ```text
-Android local SQLite
-        |
-        | versioned JSON snapshots and requests
-        v
-Documents/Trainlog on Android storage
-        |
-        | direct MTP / libmtp
-        v
-trainlog_sync_run() <---- trainlog-syncd or desktop TUI
-        |
-        +---- import Android snapshot into desktop SQLite
-        +---- publish desktop catalog companions to Android
-        +---- write a synchronization receipt
-
-desktop SQLite = canonical long-term history
+┌──────────────────────────────┐
+│ Android field companion      │
+│ private SQLite capture store │
+└──────────────┬───────────────┘
+               │ versioned JSON generations + acknowledgements
+               │ Bluetooth RFCOMM primary · direct USB/MTP recovery
+               ▼
+┌──────────────────────────────┐       optional, separately configured
+│ Synchronization orchestration│◄───── private Drive workflow
+└──────────────┬───────────────┘
+               │ typed imports, commands and read models
+               ▼
+┌──────────────────────────────┐
+│ Trainlog Core · C17          │
+│ desktop SQLite = canonical   │
+│ long-term history            │
+└──────────────┬───────────────┘
+               │
+        ┌──────┴──────────┐
+        ▼                 ▼
+┌──────────────┐   ┌──────────────────────┐
+│ Notcurses TUI│   │ 127.0.0.1 Web adapter│──► browser
+└──────────────┘   └──────────────────────┘
 ```
 
-The optional desktop AI flow exports read-only history and exchanges session
-proposals through Google Drive via the external `rclone` process. Android does
-not contain cloud credentials and does not run `rclone`.
+The TUI, Web application, and Android client are sibling adapters with
+different responsibilities. Business rules, calculations, persistence, and
+typed read models belong to Core; presentation code does not reconstruct them
+from raw database tables. See the full
+[`architecture contract`](docs/architecture.md).
 
-## Current status
+## ✦ Your data, your system
 
-As of 2026-09-15:
+- Trainlog runs on the user's own Android and Linux systems; no hosted Trainlog
+  account or proprietary cloud service is required for core capture, history,
+  analytics, or direct synchronization.
+- Android and desktop each keep a local SQLite database; the desktop database
+  is the canonical long-term history.
+- Devices exchange bounded, versioned JSON artifacts—not database files.
+- The local Web server binds to `127.0.0.1` by default and never silently falls
+  back to a LAN address or another port.
+- Direct Android storage uses `Documents/Trainlog`; desktop USB access uses
+  `libudev` and `libmtp` without requiring a GVFS/FUSE mount.
+- The optional Drive path is operator-configured through external `rclone`.
+  Android holds no cloud credentials.
 
-- `TRAINLOG_FORMAT_V1=PASS/FROZEN`;
-- desktop SQLite schema v18 and Android SQLite schema v17;
-- Notcurses is the only active desktop terminal backend;
-- direct storage is `/storage/emulated/0/Documents/Trainlog` under Android's
-  all-files access setting;
-- mobile export V3 is active; V1/V2 remain readable legacy inputs;
-- `STATS_V1=IMPLEMENTED`, `TRAINING_KNOWLEDGE_V1=PASS`, and
-  `SESSION_GENERATOR_V1=PASS` (the generator is hidden pending V2);
-- `APP_SHELL_V1=IMPLEMENTED_AWAITING_VISUAL_REVIEW_2`;
-- `TRAINLOG_AI_SESSION_DRAFT_V1=VALIDATION_PENDING` pending a real Drive plus
-  Android-triggered bidirectional smoke test.
-- `TRAINLOG_WEB_V1=CONTRACT_FROZEN / IMPLEMENTATION_NOT_STARTED`.
+## ✦ Build and run
 
-The latest executable result belongs in
-[current state](docs/current_state.md), not in multiple README narratives.
+### Desktop and TUI
 
-## Desktop development quick start
-
-Requirements include Meson, Ninja, SQLite3, utf8proc, libuuid, libudev,
-libmtp, and Notcurses.
+The desktop build requires Meson, Ninja, a C17 toolchain, `pkg-config`, Python
+3, and development files for SQLite, libuuid, utf8proc, libudev, libmtp,
+Notcurses Core, GNU libmicrohttpd, and yyjson.
 
 ```bash
 meson setup build
@@ -246,13 +127,36 @@ meson test -C build --print-errorlogs
 ./build/tui/trainlog
 ```
 
-The database path is `$XDG_DATA_HOME/trainlog/trainlog.db`, or
+The desktop database is stored at
+`$XDG_DATA_HOME/trainlog/trainlog.db`, or
 `~/.local/share/trainlog/trainlog.db` when `XDG_DATA_HOME` is unset.
 
-## Android development quick start
+### Embedded local Web application
 
-Use Java 17 and provide the Android SDK through `ANDROID_HOME` or the untracked
-`android/local.properties` file.
+Node and npm are build-time dependencies only. Meson does not download npm
+packages.
+
+```bash
+cd web
+npm ci
+npm run typecheck
+npm test
+cd ..
+
+meson setup build-web -Dweb=enabled
+meson compile -C build-web
+./build-web/tui/trainlog --web
+```
+
+The Web application listens on `127.0.0.1:8080` by default. Use
+`--port <port>` for an explicit alternative. For an existing build directory,
+use `meson configure build -Dweb=enabled` instead of running `meson setup`
+again.
+
+### Android
+
+Android builds use the committed Gradle wrapper, JDK 17, and an Android SDK for
+the configured API levels (`minSdk 26`, `targetSdk 36`, `compileSdk 37`).
 
 ```bash
 cd android
@@ -260,38 +164,81 @@ JAVA_HOME=/usr/lib/jvm/java-17-openjdk ./gradlew test
 JAVA_HOME=/usr/lib/jvm/java-17-openjdk ./gradlew assembleDebug
 ```
 
-Instrumented tests belong on an emulator. Do not run
-`connectedDebugAndroidTest` on the primary personal phone.
+Instrumented tests belong on an emulator; the primary personal phone is
+reserved for manual, non-destructive installation and synchronization checks.
+Release APK signing is intentionally operator-local and is not configured with
+credentials from this repository.
 
-## Synchronization quick start
+<details>
+<summary>Optional user-session services</summary>
+
+After a desktop build, the repository provides an installer for the private
+automatic synchronization services:
 
 ```bash
-meson compile -C build
 bash tools/install_syncd_user.sh
 systemctl --user is-active trainlog-syncd.service
 ```
 
-On Android, grant all-files access for the fixed `Documents/Trainlog`
-directory, then use **Synchronisation → Synchroniser maintenant**. Hardware MTP
-validation requires an unlocked connected device and remains an explicit manual
-check.
+This modifies the current user's `~/.local/bin` and systemd user configuration.
+Bluetooth generation transport starts only when its separate Trainlog
+configuration explicitly enables it. The loopback Web development unit in
+`systemd/trainlog-web.service` is another optional integration; neither service
+is required for manual TUI use.
 
-## Development principles
+</details>
 
-- Preserve frozen, versioned compatibility boundaries.
-- Use stable IDs; display names are not identities.
-- Keep performed work separate from plans and continuous activity separate
-  from fake sets.
-- Keep Android capture, desktop analytics, persistence, transport, and
-  rendering responsibilities distinct.
-- Prefer explicit failure to silent data loss or corruption.
-- Treat migrations, idempotence, tests, and documentation as part of feature
-  completion.
-- Keep scientific catalogs separate from runtime user data and preserve stated
-  uncertainty.
+Prebuilt stable APKs and Linux x86-64 runtime bundles are published on both
+official mirrors: [Forgejo Releases](https://git.labfytools.com/fy59/trainlog/releases)
+and [GitHub Releases](https://github.com/labfytools/trainlog/releases). Verify
+downloaded artifacts against the accompanying `SHA256SUMS`.
 
-## License and project notes
+## ✦ Repository layout
 
-See [LICENSE](LICENSE). Forgejo is the primary repository; GitHub is a mirror.
-Repository layout, detailed contracts, and historical review records are linked
-from [docs/README.md](docs/README.md).
+```text
+trainlog/
+├── android/          Kotlin + Jetpack Compose field companion
+├── tui/              C17 Core, Notcurses TUI, Web adapter and native tests
+├── web/              React + TypeScript + Vite frontend
+├── catalog/          versioned scientific and product knowledge
+├── format/           JSON schemas and frozen format material
+├── contracts/        machine-readable presentation contracts
+├── tools/            validators, import/export and sync utilities
+├── tests/            cross-surface and protocol regression tests
+├── systemd/          optional user-session integration
+└── docs/             canonical documentation and review evidence
+```
+
+## ✦ Documentation
+
+| Start here                                                   | Scope                                                                           |
+| ------------------------------------------------------------ | ------------------------------------------------------------------------------- |
+| [`docs/current_state.md`](docs/current_state.md)             | Implemented capabilities, versions, validation evidence and active limitations. |
+| [`docs/architecture.md`](docs/architecture.md)               | Component, storage, process, transport and ownership boundaries.                |
+| [`docs/roadmap.md`](docs/roadmap.md)                         | Current cursor and future work.                                                 |
+| [`docs/android.md`](docs/android.md)                         | Android capture, persistence and synchronization behavior.                      |
+| [`docs/tui.md`](docs/tui.md)                                 | Notcurses workflows, correction, analytics and technical tools.                 |
+| [`docs/sync_exchange.md`](docs/sync_exchange.md)             | Active synchronization flow, replay and acknowledgement semantics.              |
+| [`docs/exchange_format.md`](docs/exchange_format.md)         | Frozen and separately versioned JSON contracts.                                 |
+| [`docs/exercise_data_model.md`](docs/exercise_data_model.md) | Exercise, occurrence, planning, load and MAX semantics.                         |
+| [`docs/database.md`](docs/database.md)                       | Desktop SQLite schema and migration contracts.                                  |
+| [`docs/tests.md`](docs/tests.md)                             | Canonical validation commands and coverage strategy.                            |
+
+The complete ownership map is in [`docs/README.md`](docs/README.md), with
+chronological detail in the [`CHANGELOG`](CHANGELOG.md).
+
+## ✦ Project status
+
+| Boundary            | Current state                                                                                             |
+| ------------------- | --------------------------------------------------------------------------------------------------------- |
+| Product             | `0.1.6` stable                                                                                            |
+| Desktop persistence | SQLite schema v36                                                                                         |
+| Android persistence | SQLite schema v33                                                                                         |
+| Mobile exchange     | V3 active; V1/V2 readable; V4 staged only                                                                 |
+| Desktop terminal    | C17 + Notcurses, active backend                                                                           |
+| Local Web           | Dashboard and operational Analyse, Programmes, Sessions, Exercises, Equipment, Settings and sync surfaces |
+| Interface language  | French by default; English selectable on Android and desktop                                              |
+| Compatibility       | `TRAINLOG_FORMAT_V1=PASS/FROZEN`                                                                          |
+
+Forgejo is the primary repository; GitHub is its release mirror. Trainlog is
+licensed under the [GNU General Public License v3](LICENSE).

android/README.md

@@ -14,7 +14,7 @@ ANDROID_BODY_SHELL=IMPLEMENTED
 LOCAL_PERSISTENCE=IMPLEMENTED
 DIRECT_STORAGE=IMPLEMENTED
 MTP_SYNC=IMPLEMENTED
-ANDROID_SCHEMA=17
+ANDROID_SCHEMA=33
 ```
 
 ## Visual contract

android/app/build.gradle.kts

@@ -1,3 +1,4 @@
+import java.time.OffsetDateTime
 import java.util.Properties
 
 plugins {
@@ -35,6 +36,47 @@ val releaseSigningComplete = listOf(
     releaseKeyPassword,
 ).all { !it.isNullOrBlank() }
 
+/* CONTRACT: a private rollout may need an update-only version code above the
+ * repository default while preserving versionName, schemas and protocols.
+ * INVARIANT: the override remains a positive Android package version code and
+ * never changes the source default used by ordinary builds. */
+val trainlogVersionCode =
+    providers.environmentVariable("TRAINLOG_ANDROID_VERSION_CODE").orNull?.let { raw ->
+        raw.toIntOrNull()?.takeIf { it in 1..Int.MAX_VALUE }
+            ?: throw GradleException("TRAINLOG_ANDROID_VERSION_CODE must be a positive integer")
+    } ?: 7
+
+/*
+ * WHY: a user may need to finish one preserved draft after a completion bug
+ * has been repaired, while its factual end time predates the repair build.
+ * CONTRACT: both values are private-build inputs, must be supplied together,
+ * and are embedded only after strict identity/timestamp validation.
+ * INVARIANT: ordinary builds use empty values and every non-matching future
+ * session continues to finalize at the live clock time.
+ */
+val recoverySessionId =
+    providers.environmentVariable("TRAINLOG_ANDROID_RECOVERY_SESSION_ID").orNull.orEmpty()
+val recoveryEndedAt =
+    providers.environmentVariable("TRAINLOG_ANDROID_RECOVERY_ENDED_AT").orNull.orEmpty()
+if (recoverySessionId.isEmpty() != recoveryEndedAt.isEmpty()) {
+    throw GradleException(
+        "TRAINLOG_ANDROID_RECOVERY_SESSION_ID and " +
+            "TRAINLOG_ANDROID_RECOVERY_ENDED_AT must be supplied together",
+    )
+}
+if (recoverySessionId.isNotEmpty()) {
+    val sessionPattern =
+        Regex("^se_[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$")
+    if (!sessionPattern.matches(recoverySessionId)) {
+        throw GradleException("TRAINLOG_ANDROID_RECOVERY_SESSION_ID is invalid")
+    }
+    try {
+        OffsetDateTime.parse(recoveryEndedAt)
+    } catch (_: Exception) {
+        throw GradleException("TRAINLOG_ANDROID_RECOVERY_ENDED_AT is invalid")
+    }
+}
+
 android {
     namespace = "com.labfytools.trainlog"
     compileSdk = 37
@@ -44,8 +86,10 @@ android {
         minSdk = 26
         targetSdk = 36
 
-        versionCode = 2
-        versionName = "0.1.1"
+        versionCode = trainlogVersionCode
+        versionName = "0.1.6"
+        buildConfigField("String", "ACTIVE_SESSION_RECOVERY_ID", "\"$recoverySessionId\"")
+        buildConfigField("String", "ACTIVE_SESSION_RECOVERY_ENDED_AT", "\"$recoveryEndedAt\"")
         testInstrumentationRunner =
             "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -76,6 +120,7 @@ android {
 
     buildFeatures {
         compose = true
+        buildConfig = true
     }
 
     sourceSets {
@@ -136,6 +181,9 @@ dependencies {
     implementation(
         "androidx.activity:activity-compose:1.13.0"
     )
+    implementation("androidx.core:core-ktx:1.17.0")
+    implementation("androidx.documentfile:documentfile:1.1.0")
+    implementation("androidx.work:work-runtime-ktx:2.10.5")
 
     implementation(
         "androidx.compose.foundation:foundation"

android/app/src/debug/java/com/labfytools/trainlog/ui/DraftUiTestActivity.kt

@@ -60,6 +60,7 @@ class DraftUiTestActivity : ComponentActivity() {
                             sessionVisible = false
                         },
                         onCreateExercise = {},
+                        onCreateEquipment = { _ -> },
                         /* CONTRACT: this host never writes shared export data. */
                         onSessionSaved = {},
                     )
@@ -82,8 +83,6 @@ class DraftUiTestActivity : ComponentActivity() {
                                 ?: (loaded as?
                                     ActiveDraftLoadResult.Loaded)
                                     ?.warning,
-                        latestSession = null,
-                        latestMaximum = null,
                         bodyZoneOverview = repository.getBodyZoneHomeOverview(),
                         onSession = {
                             when (
@@ -102,9 +101,7 @@ class DraftUiTestActivity : ComponentActivity() {
                             }
                         },
                         onOpenExercises = {},
-                        onOpenStatistics = {},
                         onBody = {},
-                        onOpenLatestSession = {},
                         onSync = {},
                     )
                 }

android/app/src/main/AndroidManifest.xml

@@ -5,6 +5,25 @@
     <!-- Personal sideloaded app: permanent bidirectional MTP exchange uses one
          user-visible directory, Documents/Trainlog, without a SAF provider. -->
     <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission
+        android:name="android.permission.BLUETOOTH"
+        android:maxSdkVersion="30" />
+    <uses-permission
+        android:name="android.permission.BLUETOOTH_ADMIN"
+        android:maxSdkVersion="30" />
+    <!-- BLE cardio discovery does not derive physical location. Android 11 and
+         lower still require fine location for direct BLE scans. -->
+    <uses-permission
+        android:name="android.permission.ACCESS_FINE_LOCATION"
+        android:maxSdkVersion="30" />
+    <uses-permission
+        android:name="android.permission.BLUETOOTH_SCAN"
+        android:usesPermissionFlags="neverForLocation" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE" />
 
     <application
         android:allowBackup="false"
@@ -26,5 +45,14 @@
                     android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <service
+            android:name=".data.SyncBackgroundService"
+            android:exported="false"
+            android:foregroundServiceType="connectedDevice|dataSync" />
+        <service
+            android:name=".data.HeartRateSensorService"
+            android:exported="false"
+            android:foregroundServiceType="connectedDevice" />
     </application>
 </manifest>

android/app/src/main/java/com/labfytools/trainlog/MainActivity.kt

@@ -14,6 +14,12 @@ import com.labfytools.trainlog.data.TrainlogRepository
 import com.labfytools.trainlog.data.SyncExporter
 import com.labfytools.trainlog.data.SyncCatalogInbox
 import com.labfytools.trainlog.data.SyncRequestOutbox
+import com.labfytools.trainlog.data.BackgroundSyncSettings
+import com.labfytools.trainlog.data.SyncBackgroundService
+import com.labfytools.trainlog.data.HeartRateSensorPreferences
+import com.labfytools.trainlog.data.HeartRateSensorService
+import com.labfytools.trainlog.data.hasBluetoothConnectPermission
+import com.labfytools.trainlog.data.hasHeartRateBleRuntimePermissions
 import com.labfytools.trainlog.ui.TrainlogApp
 import com.labfytools.trainlog.ui.TrainlogAppState
 import com.labfytools.trainlog.ui.LanguagePresentation
@@ -30,6 +36,19 @@ class MainActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
         languageSettings = LanguageSettingsOwner(applicationContext)
 
+        if (
+            BackgroundSyncSettings(applicationContext).enabled &&
+            hasBluetoothConnectPermission(applicationContext)
+        ) {
+            SyncBackgroundService.start(applicationContext)
+        }
+        if (
+            HeartRateSensorPreferences(applicationContext).selected() != null &&
+            hasHeartRateBleRuntimePermissions(applicationContext)
+        ) {
+            HeartRateSensorService.start(applicationContext)
+        }
+
         val repository =
             TrainlogRepository(
                 applicationContext

android/app/src/main/java/com/labfytools/trainlog/data/AiExportDrivePublisher.kt

@@ -0,0 +1,235 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import androidx.documentfile.provider.DocumentFile
+import androidx.work.Constraints
+import androidx.work.CoroutineWorker
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.ExistingWorkPolicy
+import androidx.work.NetworkType
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.PeriodicWorkRequestBuilder
+import androidx.work.WorkManager
+import androidx.work.WorkerParameters
+import java.io.File
+import java.io.FileOutputStream
+import java.security.MessageDigest
+import java.util.concurrent.TimeUnit
+import org.json.JSONObject
+
+internal const val AI_EXPORT_FILENAME = "trainlog_ai_export_v1.json"
+
+internal sealed interface AiExportDriveResult {
+    data object NotConfigured : AiExportDriveResult
+    data object Missing : AiExportDriveResult
+    data object Unchanged : AiExportDriveResult
+    data class Published(val sha256: String) : AiExportDriveResult
+    data class Error(val message: String) : AiExportDriveResult
+}
+
+internal class AiExportDriveSettings(private val context: Context) {
+    private val preferences =
+        context.applicationContext.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
+
+    val treeUri: Uri?
+        get() = preferences.getString(TREE, null)?.let(Uri::parse)
+
+    val connected: Boolean
+        get() = treeUri != null
+
+    fun connect(uri: Uri) {
+        context.contentResolver.takePersistableUriPermission(
+            uri,
+            Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION,
+        )
+        preferences.edit().putString(TREE, uri.toString()).apply()
+        schedule(context)
+    }
+
+    fun disconnect() {
+        treeUri?.let { uri ->
+            runCatching {
+                context.contentResolver.releasePersistableUriPermission(
+                    uri,
+                    Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION,
+                )
+            }
+        }
+        preferences.edit()
+            .remove(TREE)
+            .remove(LAST_SHA256)
+            .remove(LAST_SIZE)
+            .remove(LAST_MODIFIED)
+            .apply()
+        WorkManager.getInstance(context).cancelUniqueWork(PERIODIC_WORK)
+        WorkManager.getInstance(context).cancelUniqueWork(IMMEDIATE_WORK)
+    }
+
+    fun alreadyPublished(source: File, sha256: String): Boolean =
+        preferences.getString(LAST_SHA256, null) == sha256 &&
+            preferences.getLong(LAST_SIZE, -1L) == source.length() &&
+            preferences.getLong(LAST_MODIFIED, -1L) == source.lastModified()
+
+    fun needsPublication(source: File): Boolean =
+        connected &&
+            source.isFile &&
+            (
+                preferences.getString(LAST_SHA256, null) == null ||
+                    preferences.getLong(LAST_SIZE, -1L) != source.length() ||
+                    preferences.getLong(LAST_MODIFIED, -1L) != source.lastModified()
+            )
+
+    fun recordPublished(source: File, sha256: String) {
+        preferences.edit()
+            .putString(LAST_SHA256, sha256)
+            .putLong(LAST_SIZE, source.length())
+            .putLong(LAST_MODIFIED, source.lastModified())
+            .apply()
+    }
+
+    companion object {
+        private const val PREFERENCES = "trainlog-ai-export-drive"
+        private const val TREE = "tree_uri"
+        private const val LAST_SHA256 = "last_sha256"
+        private const val LAST_SIZE = "last_size"
+        private const val LAST_MODIFIED = "last_modified"
+        private const val PERIODIC_WORK = "trainlog-ai-export-drive-periodic-v1"
+        private const val IMMEDIATE_WORK = "trainlog-ai-export-drive-now-v1"
+
+        fun sourceFile(): File = File(canonicalExchangeDirectory(), AI_EXPORT_FILENAME)
+
+        fun schedule(context: Context) {
+            val constraints =
+                Constraints.Builder()
+                    .setRequiredNetworkType(NetworkType.CONNECTED)
+                    .build()
+            val periodic =
+                PeriodicWorkRequestBuilder<AiExportDriveWorker>(15, TimeUnit.MINUTES)
+                    .setConstraints(constraints)
+                    .build()
+            WorkManager.getInstance(context).enqueueUniquePeriodicWork(
+                PERIODIC_WORK,
+                ExistingPeriodicWorkPolicy.UPDATE,
+                periodic,
+            )
+            enqueueImmediate(context)
+        }
+
+        fun enqueueImmediate(context: Context) {
+            val settings = AiExportDriveSettings(context)
+            val source = sourceFile()
+            if (!settings.needsPublication(source)) return
+            val request =
+                OneTimeWorkRequestBuilder<AiExportDriveWorker>()
+                    .setConstraints(
+                        Constraints.Builder()
+                            .setRequiredNetworkType(NetworkType.CONNECTED)
+                            .build()
+                    )
+                    .build()
+            WorkManager.getInstance(context).enqueueUniqueWork(
+                IMMEDIATE_WORK,
+                ExistingWorkPolicy.KEEP,
+                request,
+            )
+        }
+    }
+}
+
+internal class AiExportDrivePublisher(private val context: Context) {
+    private val settings = AiExportDriveSettings(context)
+
+    private fun sha256(file: File): String {
+        val digest = MessageDigest.getInstance("SHA-256")
+        file.inputStream().use { input ->
+            val buffer = ByteArray(64 * 1024)
+            while (true) {
+                val count = input.read(buffer)
+                if (count < 0) break
+                digest.update(buffer, 0, count)
+            }
+        }
+        return digest.digest().joinToString("") { "%02x".format(it) }
+    }
+
+    private fun validateSource(source: File) {
+        require(source.isFile && !java.nio.file.Files.isSymbolicLink(source.toPath())) {
+            "Export IA local indisponible."
+        }
+        require(source.length() in 1..64L * 1024L * 1024L) {
+            "Export IA local invalide."
+        }
+        val root =
+            source.inputStream().bufferedReader(Charsets.UTF_8).use { reader ->
+                JSONObject(reader.readText())
+            }
+        require(
+            root.optString("format") == "TRAINLOG_AI_EXPORT" &&
+                root.optInt("version", -1) == 1
+        ) { "Format d’export IA invalide." }
+    }
+
+    fun publishPending(): AiExportDriveResult {
+        val uri = settings.treeUri ?: return AiExportDriveResult.NotConfigured
+        val source = AiExportDriveSettings.sourceFile()
+        if (!source.isFile) return AiExportDriveResult.Missing
+        return try {
+            validateSource(source)
+            val sourceSha = sha256(source)
+            if (settings.alreadyPublished(source, sourceSha)) {
+                return AiExportDriveResult.Unchanged
+            }
+            val root =
+                DocumentFile.fromTreeUri(context, uri)
+                    ?: return AiExportDriveResult.Error("Dossier Drive IA indisponible.")
+            require(root.isDirectory) { "Dossier Drive IA invalide." }
+            val destination =
+                root.findFile(AI_EXPORT_FILENAME)
+                    ?: root.createFile("application/json", AI_EXPORT_FILENAME)
+                    ?: throw IllegalStateException("Impossible de créer l’export IA sur Drive.")
+            require(destination.isFile) { "Destination Drive IA invalide." }
+
+            context.contentResolver.openOutputStream(destination.uri, "wt")?.use { output ->
+                source.inputStream().use { input -> input.copyTo(output, 64 * 1024) }
+                output.flush()
+            } ?: throw IllegalStateException("Impossible d’écrire l’export IA sur Drive.")
+
+            val verification =
+                File.createTempFile("trainlog-ai-drive-verify-", ".json", context.cacheDir)
+            try {
+                context.contentResolver.openInputStream(destination.uri)?.use { input ->
+                    FileOutputStream(verification).use { output ->
+                        input.copyTo(output, 64 * 1024)
+                        output.fd.sync()
+                    }
+                } ?: throw IllegalStateException("Impossible de relire l’export IA Drive.")
+                require(
+                    verification.length() == source.length() &&
+                        sha256(verification) == sourceSha
+                ) { "Vérification de l’export IA Drive échouée." }
+            } finally {
+                verification.delete()
+            }
+            settings.recordPublished(source, sourceSha)
+            AiExportDriveResult.Published(sourceSha)
+        } catch (error: Exception) {
+            AiExportDriveResult.Error(error.message ?: error.javaClass.simpleName)
+        }
+    }
+}
+
+class AiExportDriveWorker(
+    context: Context,
+    parameters: WorkerParameters,
+) : CoroutineWorker(context, parameters) {
+    override suspend fun doWork(): Result =
+        when (AiExportDrivePublisher(applicationContext).publishPending()) {
+            AiExportDriveResult.NotConfigured,
+            AiExportDriveResult.Missing,
+            AiExportDriveResult.Unchanged,
+            is AiExportDriveResult.Published -> Result.success()
+            is AiExportDriveResult.Error -> Result.retry()
+        }
+}

android/app/src/main/java/com/labfytools/trainlog/data/AndroidBackupService.kt

@@ -0,0 +1,351 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import java.io.File
+import java.io.InputStream
+import java.io.OutputStream
+import java.security.MessageDigest
+import java.time.OffsetDateTime
+import java.util.zip.ZipEntry
+import java.util.zip.ZipInputStream
+import java.util.zip.ZipOutputStream
+import org.json.JSONArray
+import org.json.JSONObject
+
+internal sealed interface AndroidBackupResult {
+    data class Success(val bytes: Long) : AndroidBackupResult
+
+    data class Error(val message: String) : AndroidBackupResult
+}
+
+internal data class VerifiedAndroidBackup(
+    val directory: File,
+    val database: File,
+    val preferences: File,
+)
+
+/** Complete same-installation backup container; plaintext is explicit by design. */
+internal class AndroidBackupService(
+    private val context: Context,
+    private val productVersion: String =
+        checkNotNull(
+            context.packageManager.getPackageInfo(context.packageName, 0).versionName,
+        ),
+) {
+    companion object {
+        const val FORMAT = "trainlog-android-backup"
+        const val VERSION = 1
+        const val MAX_ENTRY_BYTES = 768L * 1024L * 1024L
+        const val MAX_TOTAL_BYTES = 1024L * 1024L * 1024L
+        private val PREFERENCES = listOf("trainlog-sync", "trainlog_presentation_settings")
+    }
+
+    private fun digest(file: File): String {
+        val value = MessageDigest.getInstance("SHA-256")
+        file.inputStream().use { input ->
+            val buffer = ByteArray(64 * 1024)
+            while (true) {
+                val count = input.read(buffer)
+                if (count < 0) break
+                value.update(buffer, 0, count)
+            }
+        }
+        return value.digest().joinToString("") { "%02x".format(it) }
+    }
+
+    private fun preferencesJson(): String =
+        JSONObject()
+            .apply {
+                put("format", "trainlog-android-preferences")
+                put("version", 1)
+                put(
+                    "stores",
+                    JSONObject().also { stores ->
+                        PREFERENCES.forEach { name ->
+                            stores.put(
+                                name,
+                                JSONObject().also { values ->
+                                    context
+                                        .getSharedPreferences(name, Context.MODE_PRIVATE)
+                                        .all
+                                        .toSortedMap()
+                                        .forEach { (key, value) ->
+                                            when (value) {
+                                                null -> values.put(key, JSONObject.NULL)
+                                                is String,
+                                                is Boolean,
+                                                is Int,
+                                                is Long,
+                                                is Float -> values.put(key, value)
+                                                is Set<*> ->
+                                                    values.put(
+                                                        key,
+                                                        JSONArray(
+                                                            value
+                                                                .filterIsInstance<String>()
+                                                                .sorted()
+                                                        ),
+                                                    )
+                                                else -> error("Unsupported preference type")
+                                            }
+                                        }
+                                },
+                            )
+                        }
+                    },
+                )
+            }
+            .toString()
+
+    fun createPrivate(repository: TrainlogRepository): Result<File> = runCatching {
+        val directory = File(context.filesDir, "backups").apply { mkdirs() }
+        val archive = File(directory, "trainlog-backup-${java.util.UUID.randomUUID()}.tlbackup")
+        archive.outputStream().use { destination ->
+            val result = writeArchive(repository, destination)
+            if (result is AndroidBackupResult.Error) error(result.message)
+        }
+        archive
+    }
+
+    fun create(repository: TrainlogRepository, destination: OutputStream): AndroidBackupResult {
+        val archive =
+            createPrivate(repository).getOrElse {
+                return AndroidBackupResult.Error(it.message ?: "Backup failed.")
+            }
+        return try {
+            archive.inputStream().use { it.copyTo(destination) }
+            destination.flush()
+            val bytes = archive.length()
+            archive.delete()
+            AndroidBackupResult.Success(bytes)
+        } catch (error: Exception) {
+            AndroidBackupResult.Error(
+                "Export failed; private backup retained at ${archive.name}: ${error.message}"
+            )
+        }
+    }
+
+    private fun writeArchive(
+        repository: TrainlogRepository,
+        destination: OutputStream,
+    ): AndroidBackupResult {
+        val stage = File(context.cacheDir, "backup-${java.util.UUID.randomUUID()}")
+        if (!stage.mkdir())
+            return AndroidBackupResult.Error("Cannot create private backup staging.")
+        val database = File(stage, "database.sqlite")
+        val preferences = File(stage, "preferences.json")
+        return try {
+            repository.backupDatabaseTo(database)
+            preferences.writeText(preferencesJson())
+            val schema = validateDatabase(database)
+            val files = listOf("database.sqlite" to database, "preferences.json" to preferences)
+            val manifest =
+                JSONObject()
+                    .put("format", FORMAT)
+                    .put("version", VERSION)
+                    .put("package", context.packageName)
+                    .put("schema", schema)
+                    .put("product_version", productVersion)
+                    .put("plaintext", true)
+                    .put("created_at", OffsetDateTime.now().toString())
+                    .put(
+                        "entries",
+                        JSONArray(
+                            files.map { (name, file) ->
+                                JSONObject()
+                                    .put("path", name)
+                                    .put("size", file.length())
+                                    .put("sha256", digest(file))
+                            }
+                        ),
+                    )
+            var written = 0L
+            ZipOutputStream(destination).use { zip ->
+                files.forEach { (name, file) ->
+                    zip.putNextEntry(ZipEntry(name))
+                    file.inputStream().use { input -> written += input.copyTo(zip) }
+                    zip.closeEntry()
+                }
+                zip.putNextEntry(ZipEntry("manifest.json"))
+                val raw = manifest.toString().toByteArray()
+                zip.write(raw)
+                written += raw.size
+                zip.closeEntry()
+            }
+            AndroidBackupResult.Success(written)
+        } catch (error: Exception) {
+            AndroidBackupResult.Error(error.message ?: "Backup failed.")
+        } finally {
+            stage.deleteRecursively()
+        }
+    }
+
+    fun verify(input: InputStream): Result<VerifiedAndroidBackup> {
+        val stage = File(context.cacheDir, "restore-${java.util.UUID.randomUUID()}")
+        if (!stage.mkdir())
+            return Result.failure(IllegalStateException("Cannot create restore staging."))
+        return runCatching {
+                var total = 0L
+                val names = mutableSetOf<String>()
+                ZipInputStream(input).use { zip ->
+                    while (true) {
+                        val entry = zip.nextEntry ?: break
+                        require(
+                            !entry.isDirectory &&
+                                entry.name in
+                                    setOf("database.sqlite", "preferences.json", "manifest.json") &&
+                                names.add(entry.name)
+                        ) {
+                            "Invalid backup entry."
+                        }
+                        val target = File(stage, entry.name)
+                        target.outputStream().use { output ->
+                            val buffer = ByteArray(64 * 1024)
+                            var entryBytes = 0L
+                            while (true) {
+                                val count = zip.read(buffer)
+                                if (count < 0) break
+                                entryBytes += count
+                                total += count
+                                require(entryBytes <= MAX_ENTRY_BYTES && total <= MAX_TOTAL_BYTES) {
+                                    "Backup exceeds bounds."
+                                }
+                                output.write(buffer, 0, count)
+                            }
+                        }
+                    }
+                }
+                require(names == setOf("database.sqlite", "preferences.json", "manifest.json")) {
+                    "Backup entries are incomplete."
+                }
+                val manifest = JSONObject(File(stage, "manifest.json").readText())
+                require(
+                    manifest.getString("format") == FORMAT &&
+                        manifest.getInt("version") == VERSION &&
+                        manifest.getString("package") == context.packageName &&
+                        manifest.getBoolean("plaintext") &&
+                        manifest.getInt("schema") in 17..33
+                ) {
+                    "Unsupported backup."
+                }
+                val expected = manifest.getJSONArray("entries")
+                require(expected.length() == 2)
+                val manifestPaths = mutableSetOf<String>()
+                for (index in 0 until expected.length()) {
+                    val item = expected.getJSONObject(index)
+                    val path = item.getString("path")
+                    require(
+                        path in setOf("database.sqlite", "preferences.json") &&
+                            manifestPaths.add(path)
+                    ) {
+                        "Invalid manifest entry."
+                    }
+                    val file = File(stage, path)
+                    require(
+                        file.canonicalFile.parentFile == stage.canonicalFile &&
+                            file.length() == item.getLong("size") &&
+                            digest(file) == item.getString("sha256")
+                    ) {
+                        "Backup digest mismatch."
+                    }
+                }
+                require(manifestPaths == setOf("database.sqlite", "preferences.json")) {
+                    "Backup manifest is incomplete."
+                }
+                require(
+                    validateDatabase(File(stage, "database.sqlite")) == manifest.getInt("schema")
+                )
+                val preferences = JSONObject(File(stage, "preferences.json").readText())
+                require(
+                    preferences.getString("format") == "trainlog-android-preferences" &&
+                        preferences.getInt("version") == 1
+                )
+                VerifiedAndroidBackup(
+                    stage,
+                    File(stage, "database.sqlite"),
+                    File(stage, "preferences.json"),
+                )
+            }
+            .onFailure { stage.deleteRecursively() }
+    }
+
+    fun restore(
+        repository: TrainlogRepository,
+        verified: VerifiedAndroidBackup,
+        databaseName: String = "trainlog-android.db",
+    ): AndroidBackupResult {
+        val destination = context.getDatabasePath(databaseName)
+        val previous =
+            File(
+                destination.parentFile,
+                "${destination.name}.pre-restore-${java.util.UUID.randomUUID()}",
+            )
+        val previousPreferences =
+            File(context.cacheDir, "preferences-pre-restore-${java.util.UUID.randomUUID()}.json")
+        var moved = false
+        return try {
+            previousPreferences.writeText(preferencesJson())
+            repository.close()
+            destination.parentFile?.mkdirs()
+            if (destination.exists()) {
+                check(destination.renameTo(previous))
+                moved = true
+            }
+            File("${destination.path}-wal").delete()
+            File("${destination.path}-shm").delete()
+            verified.database.copyTo(destination, overwrite = false)
+            validateDatabase(destination)
+            restorePreferences(verified.preferences)
+            previous.delete()
+            previousPreferences.delete()
+            verified.directory.deleteRecursively()
+            AndroidBackupResult.Success(destination.length())
+        } catch (error: Exception) {
+            destination.delete()
+            if (moved) previous.renameTo(destination)
+            if (previousPreferences.isFile) runCatching { restorePreferences(previousPreferences) }
+            previousPreferences.delete()
+            AndroidBackupResult.Error(error.message ?: "Restore failed.")
+        }
+    }
+
+    private fun validateDatabase(file: File): Int {
+        val db = SQLiteDatabase.openDatabase(file.path, null, SQLiteDatabase.OPEN_READONLY)
+        try {
+            require(
+                db.rawQuery("PRAGMA integrity_check", null).use {
+                    it.moveToFirst() && it.getString(0) == "ok"
+                }
+            )
+            require(db.rawQuery("PRAGMA foreign_key_check", null).use { !it.moveToFirst() })
+            require(db.version in 17..33) { "Unsupported Android schema ${db.version}." }
+            return db.version
+        } finally {
+            db.close()
+        }
+    }
+
+    private fun restorePreferences(file: File) {
+        val stores = JSONObject(file.readText()).getJSONObject("stores")
+        PREFERENCES.forEach { name ->
+            val editor = context.getSharedPreferences(name, Context.MODE_PRIVATE).edit().clear()
+            val values = stores.getJSONObject(name)
+            values.keys().forEach { key ->
+                when (val value = values.get(key)) {
+                    is String -> editor.putString(key, value)
+                    is Boolean -> editor.putBoolean(key, value)
+                    is Int -> editor.putInt(key, value)
+                    is Long -> editor.putLong(key, value)
+                    is Double -> editor.putFloat(key, value.toFloat())
+                    is JSONArray ->
+                        editor.putStringSet(
+                            key,
+                            (0 until value.length()).map { value.getString(it) }.toSet(),
+                        )
+                }
+            }
+            check(editor.commit())
+        }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/BluetoothSyncTransport.kt

@@ -0,0 +1,562 @@
+package com.labfytools.trainlog.data
+
+import android.Manifest
+import android.annotation.SuppressLint
+import android.bluetooth.BluetoothClass
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothSocket
+import android.content.Context
+import android.content.pm.PackageManager
+import android.os.Build
+import android.util.Log
+import androidx.core.content.ContextCompat
+import java.io.BufferedInputStream
+import java.io.BufferedOutputStream
+import java.io.DataInputStream
+import java.io.DataOutputStream
+import java.io.File
+import java.io.FileInputStream
+import java.io.FileOutputStream
+import java.nio.file.AtomicMoveNotSupportedException
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
+import java.security.MessageDigest
+import java.time.Duration
+import java.util.UUID
+import java.util.concurrent.atomic.AtomicBoolean
+import java.util.zip.ZipEntry
+import java.util.zip.ZipFile
+import java.util.zip.ZipOutputStream
+import org.json.JSONObject
+
+internal const val TRAINLOG_BLUETOOTH_SERVICE_UUID =
+    "f0d1c0de-7a11-4f62-9b7c-545241494e4c"
+internal const val TRAINLOG_BLUETOOTH_FILE_PROTOCOL = "trainlog-bt-files-v1"
+private const val BLUETOOTH_FRAME_FORMAT = "trainlog-bt-frame"
+private const val BLUETOOTH_FRAME_VERSION = 1
+private const val MAX_BT_HEADER_BYTES = 64 * 1024
+private const val MAX_BT_PAYLOAD_BYTES = 256L * 1024L * 1024L
+private const val MAX_BT_FILE_BYTES = 64L * 1024L * 1024L
+private const val MAX_BT_FILES = 128
+private const val AUTO_REQUEST_COOLDOWN_MS = 5L * 60L * 1000L
+
+internal val BLUETOOTH_ANDROID_PULL_COORDINATION =
+    listOf(
+        "android-peer-v1.json",
+        FULL_GENERATION_REQUEST_NAME,
+        LEGACY_SYNC_REQUEST_NAME,
+        "android-generation-v1.json",
+        "android-consumption-ack-v1.json",
+        "android-archive-acknowledgements-v1.json",
+        "android-generation-error-v1.json",
+    )
+
+internal data class BondedBluetoothDesktop(
+    val name: String,
+    val address: String,
+)
+
+internal class BluetoothSyncSettings(context: Context) {
+    private val preferences =
+        context.applicationContext.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
+
+    val desktopAddress: String?
+        get() = preferences.getString(DESKTOP_ADDRESS, null)
+
+    val configured: Boolean
+        get() = desktopAddress != null
+
+    fun selectDesktop(address: String) {
+        require(BLUETOOTH_ADDRESS.matches(address.uppercase())) {
+            "Adresse Bluetooth invalide."
+        }
+        preferences.edit().putString(DESKTOP_ADDRESS, address.uppercase()).apply()
+    }
+
+    fun disconnect() {
+        preferences.edit().remove(DESKTOP_ADDRESS).apply()
+    }
+
+    fun shouldPublishAutomaticRequest(nowMillis: Long): Boolean {
+        val previous = preferences.getLong(LAST_AUTO_REQUEST, 0L)
+        return previous <= 0L || nowMillis - previous >= AUTO_REQUEST_COOLDOWN_MS
+    }
+
+    fun recordAutomaticRequest(nowMillis: Long) {
+        preferences.edit().putLong(LAST_AUTO_REQUEST, nowMillis).apply()
+    }
+
+    companion object {
+        private const val PREFERENCES = "trainlog-bluetooth-sync"
+        private const val DESKTOP_ADDRESS = "desktop_address"
+        private const val LAST_AUTO_REQUEST = "last_auto_request_ms"
+        private val BLUETOOTH_ADDRESS =
+            Regex("^[0-9A-F]{2}(:[0-9A-F]{2}){5}$")
+    }
+}
+
+internal fun hasBluetoothConnectPermission(context: Context): Boolean =
+    Build.VERSION.SDK_INT < Build.VERSION_CODES.S ||
+        ContextCompat.checkSelfPermission(context, Manifest.permission.BLUETOOTH_CONNECT) ==
+        PackageManager.PERMISSION_GRANTED
+
+/**
+ * Decide whether a newly connected RFCOMM peer may publish an automatic request.
+ *
+ * WHY: Sleep-only changes have no workout event to wake the desktop path, so
+ * Bluetooth arrival itself must remain the trigger. CONTRACT: user opt-in and
+ * the existing cooldown are both mandatory. INVARIANT: reconnection never
+ * bypasses the bounded request cadence or requires an explicit UI action.
+ */
+internal fun shouldPublishBluetoothArrivalRequest(
+    autoSyncEnabled: Boolean,
+    cooldownReady: Boolean,
+): Boolean = autoSyncEnabled && cooldownReady
+
+@SuppressLint("MissingPermission")
+internal fun bondedBluetoothDesktops(context: Context): List<BondedBluetoothDesktop> {
+    if (!hasBluetoothConnectPermission(context)) return emptyList()
+    val adapter =
+        context.getSystemService(BluetoothManager::class.java)?.adapter
+            ?: return emptyList()
+    return adapter.bondedDevices
+        .asSequence()
+        .filter { device ->
+            device.bluetoothClass?.majorDeviceClass == BluetoothClass.Device.Major.COMPUTER
+        }
+        .map { device ->
+            BondedBluetoothDesktop(
+                name = device.name?.takeIf(String::isNotBlank) ?: device.address,
+                address = device.address.uppercase(),
+            )
+        }
+        .sortedWith(compareBy<BondedBluetoothDesktop> { it.name }.thenBy { it.address })
+        .toList()
+}
+
+private fun sha256(file: File): String {
+    val digest = MessageDigest.getInstance("SHA-256")
+    FileInputStream(file).use { input ->
+        val buffer = ByteArray(64 * 1024)
+        while (true) {
+            val count = input.read(buffer)
+            if (count < 0) break
+            digest.update(buffer, 0, count)
+        }
+    }
+    return digest.digest().joinToString("") { "%02x".format(it) }
+}
+
+private data class BluetoothFrame(
+    val header: JSONObject,
+    val payload: File?,
+) : AutoCloseable {
+    override fun close() {
+        payload?.delete()
+    }
+}
+
+private class BluetoothFrameCodec(private val cacheDirectory: File) {
+    fun read(input: DataInputStream): BluetoothFrame {
+        val headerSize = input.readInt()
+        if (headerSize !in 1..MAX_BT_HEADER_BYTES)
+            throw IllegalStateException("En-tête Bluetooth invalide.")
+        val rawHeader = ByteArray(headerSize)
+        input.readFully(rawHeader)
+        val header = JSONObject(rawHeader.toString(Charsets.UTF_8))
+        require(
+            header.optString("format") == BLUETOOTH_FRAME_FORMAT &&
+                header.optInt("version", -1) == BLUETOOTH_FRAME_VERSION
+        ) { "Trame Bluetooth non supportée." }
+        val payloadSize =
+            if (header.has("payload_size")) header.getLong("payload_size") else 0L
+        require(payloadSize in 0..MAX_BT_PAYLOAD_BYTES) {
+            "Charge utile Bluetooth invalide."
+        }
+        if (payloadSize == 0L) {
+            require(!header.has("payload_sha256") || header.optString("payload_sha256").isEmpty())
+            return BluetoothFrame(header, null)
+        }
+        val expected = header.getString("payload_sha256")
+        require(expected.matches(Regex("^[0-9a-f]{64}$"))) {
+            "Empreinte Bluetooth invalide."
+        }
+        val temporary =
+            File.createTempFile("trainlog-bt-frame-", ".bin", cacheDirectory)
+        try {
+            val digest = MessageDigest.getInstance("SHA-256")
+            FileOutputStream(temporary).use { output ->
+                var remaining = payloadSize
+                val buffer = ByteArray(64 * 1024)
+                while (remaining > 0L) {
+                    val wanted = minOf(buffer.size.toLong(), remaining).toInt()
+                    val count = input.read(buffer, 0, wanted)
+                    if (count < 0) throw IllegalStateException("Connexion Bluetooth interrompue.")
+                    output.write(buffer, 0, count)
+                    digest.update(buffer, 0, count)
+                    remaining -= count.toLong()
+                }
+                output.fd.sync()
+            }
+            val actual = digest.digest().joinToString("") { "%02x".format(it) }
+            require(actual == expected) { "Empreinte Bluetooth incorrecte." }
+            return BluetoothFrame(header, temporary)
+        } catch (error: Exception) {
+            temporary.delete()
+            throw error
+        }
+    }
+
+    fun write(output: DataOutputStream, header: JSONObject, payload: File? = null) {
+        val payloadSize = payload?.length() ?: 0L
+        require(payloadSize in 0..MAX_BT_PAYLOAD_BYTES)
+        val value =
+            JSONObject(header.toString())
+                .put("format", BLUETOOTH_FRAME_FORMAT)
+                .put("version", BLUETOOTH_FRAME_VERSION)
+                .put("payload_size", payloadSize)
+        if (payload != null) {
+            require(payload.isFile)
+            value.put("payload_sha256", sha256(payload))
+        }
+        val raw = value.toString().toByteArray(Charsets.UTF_8)
+        require(raw.size in 1..MAX_BT_HEADER_BYTES)
+        output.writeInt(raw.size)
+        output.write(raw)
+        if (payload != null) {
+            FileInputStream(payload).use { input -> input.copyTo(output, 64 * 1024) }
+        }
+        output.flush()
+    }
+}
+
+private class BluetoothExchangeArchive(
+    private val context: Context,
+) {
+    private val exchangeDirectory = canonicalExchangeDirectory()
+
+    private fun safeRelative(relative: String): List<String> {
+        require(relative.isNotBlank() && '\\' !in relative)
+        val parts = relative.split('/')
+        require(parts.size in 1..6 && parts.all { it.isNotBlank() && it != "." && it != ".." })
+        return parts
+    }
+
+    private fun addFile(
+        archive: ZipOutputStream,
+        file: File,
+        relative: String,
+        seen: MutableSet<String>,
+        totals: LongArray,
+    ) {
+        if (!file.isFile || Files.isSymbolicLink(file.toPath())) return
+        safeRelative(relative)
+        require(seen.add(relative)) { "Chemin Bluetooth dupliqué." }
+        val size = file.length()
+        require(size in 0..MAX_BT_FILE_BYTES) { "Fichier Bluetooth trop volumineux." }
+        totals[0] += 1
+        totals[1] = Math.addExact(totals[1], size)
+        require(totals[0] <= MAX_BT_FILES && totals[1] <= MAX_BT_PAYLOAD_BYTES) {
+            "Archive Bluetooth trop volumineuse."
+        }
+        archive.putNextEntry(ZipEntry(relative).also { it.size = size })
+        FileInputStream(file).use { input -> input.copyTo(archive, 64 * 1024) }
+        archive.closeEntry()
+    }
+
+    fun buildAndroidPullArchive(): File {
+        require(exchangeDirectory.isDirectory) { "Dossier d'échange Trainlog indisponible." }
+        val output = File.createTempFile("trainlog-bt-pull-", ".zip", context.cacheDir)
+        val seen = linkedSetOf<String>()
+        val totals = longArrayOf(0L, 0L)
+        try {
+            ZipOutputStream(BufferedOutputStream(FileOutputStream(output))).use { zip ->
+                BLUETOOTH_ANDROID_PULL_COORDINATION.forEach { name ->
+                    addFile(zip, File(exchangeDirectory, name), name, seen, totals)
+                }
+                val reference = File(exchangeDirectory, "android-generation-v1.json")
+                if (reference.isFile && reference.length() <= MAX_BT_HEADER_BYTES) {
+                    val value = JSONObject(reference.readText())
+                    val relative = value.optString("relative_path")
+                    val generationId = value.optString("generation_id")
+                    val expected = "android-objects/generations/$generationId"
+                    require(relative == expected) { "Référence de génération Android invalide." }
+                    val directory = File(exchangeDirectory, relative)
+                    require(directory.isDirectory && !Files.isSymbolicLink(directory.toPath()))
+                    directory.listFiles().orEmpty().sortedBy(File::getName).forEach { file ->
+                        addFile(zip, file, "$relative/${file.name}", seen, totals)
+                    }
+                }
+            }
+            require(output.length() <= MAX_BT_PAYLOAD_BYTES)
+            return output
+        } catch (error: Exception) {
+            output.delete()
+            throw error
+        }
+    }
+
+    fun applyDesktopPushArchive(archiveFile: File) {
+        require(archiveFile.isFile && archiveFile.length() in 1..MAX_BT_PAYLOAD_BYTES)
+        if (!exchangeDirectory.exists()) require(exchangeDirectory.mkdirs())
+        require(exchangeDirectory.isDirectory)
+        val root = exchangeDirectory.canonicalFile
+        val seen = linkedSetOf<String>()
+        val published = mutableListOf<File>()
+        var count = 0L
+        var total = 0L
+        ZipFile(archiveFile).use { archive ->
+            val entries = archive.entries()
+            while (entries.hasMoreElements()) {
+                val entry = entries.nextElement()
+                if (entry.isDirectory) continue
+                val parts = safeRelative(entry.name)
+                require(seen.add(entry.name)) { "Chemin Bluetooth dupliqué." }
+                require(entry.size in 0..MAX_BT_FILE_BYTES) { "Fichier Bluetooth trop volumineux." }
+                count += 1
+                total = Math.addExact(total, entry.size)
+                require(count <= MAX_BT_FILES && total <= MAX_BT_PAYLOAD_BYTES)
+                val destination =
+                    parts.fold(root) { parent, name -> File(parent, name) }
+                val parent = requireNotNull(destination.parentFile)
+                require(parent.mkdirs() || parent.isDirectory)
+                require(parent.canonicalFile.toPath().startsWith(root.toPath())) {
+                    "Chemin Bluetooth hors du dossier Trainlog."
+                }
+                val temporary =
+                    File(parent, ".${destination.name}.bt-${UUID.randomUUID()}.tmp")
+                try {
+                    archive.getInputStream(entry).use { input ->
+                        FileOutputStream(temporary).use { output ->
+                            var copied = 0L
+                            val buffer = ByteArray(64 * 1024)
+                            while (true) {
+                                val read = input.read(buffer)
+                                if (read < 0) break
+                                copied += read.toLong()
+                                require(copied <= entry.size)
+                                output.write(buffer, 0, read)
+                            }
+                            require(copied == entry.size)
+                            output.fd.sync()
+                        }
+                    }
+                    try {
+                        Files.move(
+                            temporary.toPath(),
+                            destination.toPath(),
+                            StandardCopyOption.ATOMIC_MOVE,
+                            StandardCopyOption.REPLACE_EXISTING,
+                        )
+                    } catch (_: AtomicMoveNotSupportedException) {
+                        Files.move(
+                            temporary.toPath(),
+                            destination.toPath(),
+                            StandardCopyOption.REPLACE_EXISTING,
+                        )
+                    }
+                    published += destination
+                } catch (error: Exception) {
+                    temporary.delete()
+                    throw error
+                }
+            }
+        }
+        AndroidMtpPublicationVisibility(context).confirm(published)
+        if (AI_EXPORT_FILENAME in seen) {
+            AiExportDriveSettings.enqueueImmediate(context)
+        }
+    }
+}
+
+internal class BluetoothSyncClient(
+    private val context: Context,
+    private val repository: TrainlogRepository,
+) {
+    companion object {
+        private const val TAG = "TrainlogBluetoothSync"
+    }
+    @Volatile private var activeSocket: BluetoothSocket? = null
+    private val settings = BluetoothSyncSettings(context)
+    private val codec = BluetoothFrameCodec(context.cacheDir)
+    private val archive = BluetoothExchangeArchive(context)
+
+    @SuppressLint("MissingPermission")
+    fun run(stopped: AtomicBoolean) {
+        while (!stopped.get()) {
+            if (!settings.configured || !hasBluetoothConnectPermission(context)) {
+                sleep(stopped, Duration.ofSeconds(10))
+                continue
+            }
+            val adapter =
+                context.getSystemService(BluetoothManager::class.java)?.adapter
+            if (adapter == null || !adapter.isEnabled) {
+                sleep(stopped, Duration.ofSeconds(10))
+                continue
+            }
+            val address = settings.desktopAddress ?: continue
+            val device =
+                runCatching { adapter.getRemoteDevice(address) }
+                    .onFailure { Log.w(TAG, "Configured Bluetooth desktop is invalid", it) }
+                    .getOrNull()
+            if (device == null || !ensureBond(device, stopped)) {
+                sleep(stopped, Duration.ofSeconds(5))
+                continue
+            }
+            val socket =
+                runCatching {
+                    device.createRfcommSocketToServiceRecord(
+                        UUID.fromString(TRAINLOG_BLUETOOTH_SERVICE_UUID)
+                    )
+                }
+                    .onFailure { Log.w(TAG, "Unable to create RFCOMM socket", it) }
+                    .getOrNull()
+            if (socket == null) {
+                sleep(stopped, Duration.ofSeconds(10))
+                continue
+            }
+            activeSocket = socket
+            try {
+                socket.connect()
+                Log.i(TAG, "RFCOMM connected to selected Trainlog desktop")
+                serve(socket, stopped)
+            } catch (error: Exception) {
+                Log.w(TAG, "RFCOMM connection ended: ${error.message}", error)
+            } finally {
+                activeSocket = null
+                runCatching { socket.close() }
+            }
+            if (!stopped.get()) sleep(stopped, Duration.ofSeconds(5))
+        }
+    }
+
+    fun shutdown() {
+        runCatching { activeSocket?.close() }
+        activeSocket = null
+    }
+
+    @SuppressLint("MissingPermission")
+    private fun ensureBond(device: BluetoothDevice, stopped: AtomicBoolean): Boolean {
+        if (device.bondState == BluetoothDevice.BOND_BONDED) return true
+        if (device.bondState == BluetoothDevice.BOND_NONE) {
+            Log.i(TAG, "Bluetooth bond missing; requesting one-time repair")
+            if (!runCatching { device.createBond() }.getOrDefault(false)) {
+                Log.w(TAG, "Bluetooth bond request was rejected by Android")
+                return false
+            }
+        }
+        val deadline = System.nanoTime() + Duration.ofSeconds(30).toNanos()
+        while (!stopped.get() && System.nanoTime() < deadline) {
+            when (device.bondState) {
+                BluetoothDevice.BOND_BONDED -> {
+                    Log.i(TAG, "Bluetooth bond ready")
+                    return true
+                }
+                BluetoothDevice.BOND_NONE -> {
+                    Log.w(TAG, "Bluetooth bond repair failed")
+                    return false
+                }
+            }
+            sleep(stopped, Duration.ofMillis(250))
+        }
+        return device.bondState == BluetoothDevice.BOND_BONDED
+    }
+
+    private fun sleep(stopped: AtomicBoolean, duration: Duration) {
+        val deadline = System.nanoTime() + duration.toNanos()
+        while (!stopped.get() && System.nanoTime() < deadline) {
+            try {
+                Thread.sleep(250)
+            } catch (_: InterruptedException) {
+                Thread.currentThread().interrupt()
+                return
+            }
+        }
+    }
+
+    private fun serve(socket: BluetoothSocket, stopped: AtomicBoolean) {
+        val input = DataInputStream(BufferedInputStream(socket.inputStream))
+        val output = DataOutputStream(BufferedOutputStream(socket.outputStream))
+        val peer = SyncGenerationService(repository).peerId()
+        codec.write(
+            output,
+            JSONObject()
+                .put("type", "hello")
+                .put("protocol", TRAINLOG_BLUETOOTH_FILE_PROTOCOL)
+                .put("peer_id", peer),
+        )
+        codec.read(input).use { response ->
+            require(
+                response.payload == null &&
+                    response.header.optString("type") == "hello_ack" &&
+                    response.header.optString("protocol") == TRAINLOG_BLUETOOTH_FILE_PROTOCOL &&
+                    response.header.optString("peer_id") == peer
+            ) { "Accusé Bluetooth Trainlog invalide." }
+        }
+
+        publishArrivalRequest()
+
+        while (!stopped.get()) {
+            codec.read(input).use { frame ->
+                val type = frame.header.optString("type")
+                val requestId = frame.header.optString("request_id")
+                require(requestId.startsWith("bt_")) { "Requête Bluetooth non corrélée." }
+                when (type) {
+                    "pull" -> {
+                        require(frame.payload == null)
+                        val payload = archive.buildAndroidPullArchive()
+                        try {
+                            codec.write(
+                                output,
+                                JSONObject()
+                                    .put("type", "result")
+                                    .put("request_id", requestId)
+                                    .put("result", "ok"),
+                                payload,
+                            )
+                        } finally {
+                            payload.delete()
+                        }
+                    }
+                    "push" -> {
+                        val payload = requireNotNull(frame.payload) {
+                            "Archive Bluetooth desktop absente."
+                        }
+                        archive.applyDesktopPushArchive(payload)
+                        codec.write(
+                            output,
+                            JSONObject()
+                                .put("type", "result")
+                                .put("request_id", requestId)
+                                .put("result", "ok"),
+                        )
+                    }
+                    else -> throw IllegalStateException("Opération Bluetooth non supportée.")
+                }
+            }
+        }
+    }
+
+    private fun publishArrivalRequest() {
+        val now = System.currentTimeMillis()
+        if (
+            !shouldPublishBluetoothArrivalRequest(
+                BackgroundSyncSettings(context).enabled,
+                settings.shouldPublishAutomaticRequest(now),
+            )
+        ) {
+            return
+        }
+        val directory = canonicalExchangeDirectory()
+        if (!directory.isDirectory) return
+        val coordinator =
+            SyncGenerationCoordinator(repository, AndroidMtpPublicationVisibility(context))
+        coordinator.publishPeer(directory)
+        when (SyncRequestOutbox(context).requestFullGeneration()) {
+            is SyncRequestResult.Requested,
+            is SyncRequestResult.Completed -> settings.recordAutomaticRequest(now)
+            else -> Unit
+        }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/CardioGuidanceEngine.kt

@@ -0,0 +1,190 @@
+package com.labfytools.trainlog.data
+
+import com.labfytools.trainlog.model.CardioGuidanceInstruction
+import com.labfytools.trainlog.model.CardioGuidanceOutput
+import com.labfytools.trainlog.model.CardioTargetDefinition
+import com.labfytools.trainlog.model.CardioTargetSnapshot
+import kotlin.math.roundToInt
+
+internal object CardioTargetResolver {
+    fun resolve(definition: CardioTargetDefinition): CardioTargetSnapshot? =
+        when (definition) {
+            is CardioTargetDefinition.AbsoluteBpm -> {
+                if (!validBounds(definition.minimumBpm, definition.maximumBpm)) return null
+                CardioTargetSnapshot(
+                    minimumBpm = definition.minimumBpm,
+                    maximumBpm = definition.maximumBpm,
+                )
+            }
+
+            is CardioTargetDefinition.CalibrationPercent -> {
+                if (
+                    definition.calibrationId.isBlank() ||
+                    definition.observedPeakBpm !in 1..65535 ||
+                    definition.minimumPercent !in 1..100 ||
+                    definition.maximumPercent !in 1..100 ||
+                    definition.minimumPercent > definition.maximumPercent
+                ) return null
+                val minimum =
+                    (definition.observedPeakBpm * definition.minimumPercent / 100.0)
+                        .roundToInt()
+                val maximum =
+                    (definition.observedPeakBpm * definition.maximumPercent / 100.0)
+                        .roundToInt()
+                if (!validBounds(minimum, maximum)) return null
+                CardioTargetSnapshot(
+                    minimumBpm = minimum,
+                    maximumBpm = maximum,
+                    calibrationId = definition.calibrationId,
+                    calibrationObservedPeakBpm = definition.observedPeakBpm,
+                    minimumPercent = definition.minimumPercent,
+                    maximumPercent = definition.maximumPercent,
+                )
+            }
+        }
+
+    private fun validBounds(minimum: Int, maximum: Int): Boolean =
+        minimum in 1..65535 && maximum in 1..65535 && minimum <= maximum
+}
+
+/**
+ * Pure state machine for BPM guidance.
+ *
+ * Hysteresis and confirmation time are UI/control stability parameters, not
+ * physiological zones. The engine never extrapolates a stale measurement.
+ */
+internal object CardioPhaseCompletion {
+    fun isComplete(
+        phase: com.labfytools.trainlog.model.CardioGuidedPhase,
+        elapsedSeconds: Int,
+        bpm: Int?,
+        fresh: Boolean,
+    ): Boolean {
+        if (elapsedSeconds < 0) return false
+        return when (val exit = phase.exitCondition) {
+            is com.labfytools.trainlog.model.CardioPhaseExitCondition.FixedDuration ->
+                elapsedSeconds >= exit.seconds
+
+            com.labfytools.trainlog.model.CardioPhaseExitCondition.EnterTarget -> {
+                val target = phase.target ?: return false
+                fresh && bpm != null && bpm in target.minimumBpm..target.maximumBpm
+            }
+
+            is com.labfytools.trainlog.model.CardioPhaseExitCondition.RecoverBelow ->
+                fresh && bpm != null && bpm <= exit.bpm
+
+            is com.labfytools.trainlog.model.CardioPhaseExitCondition.DurationOrRecoverBelow ->
+                elapsedSeconds >= exit.maximumSeconds ||
+                    (fresh && bpm != null && bpm <= exit.bpm)
+        }
+    }
+}
+
+internal class CardioGuidanceEngine(
+    private val hysteresisBpm: Int = DEFAULT_HYSTERESIS_BPM,
+    private val confirmationMs: Long = DEFAULT_CONFIRMATION_MS,
+    initialInstruction: CardioGuidanceInstruction = CardioGuidanceInstruction.MAINTAIN,
+) {
+    private var current =
+        initialInstruction.takeUnless { it == CardioGuidanceInstruction.SUSPENDED }
+            ?: CardioGuidanceInstruction.MAINTAIN
+    private var candidate: CardioGuidanceInstruction? = null
+    private var candidateSinceMs: Long? = null
+
+    init {
+        require(hysteresisBpm in 0..20)
+        require(confirmationMs in 0L..30_000L)
+    }
+
+    fun reset() {
+        current = CardioGuidanceInstruction.MAINTAIN
+        candidate = null
+        candidateSinceMs = null
+    }
+
+    fun evaluate(
+        target: CardioTargetSnapshot?,
+        bpm: Int?,
+        fresh: Boolean,
+        nowMs: Long,
+    ): CardioGuidanceOutput {
+        require(nowMs >= 0L)
+        if (!fresh || bpm == null || bpm !in 1..65535 || target == null) {
+            candidate = null
+            candidateSinceMs = null
+            return CardioGuidanceOutput(
+                instruction = CardioGuidanceInstruction.SUSPENDED,
+                bpm = null,
+                target = target,
+            )
+        }
+        require(target.minimumBpm in 1..65535)
+        require(target.maximumBpm in target.minimumBpm..65535)
+
+        val desired = desiredInstruction(target, bpm)
+        if (desired == current) {
+            candidate = null
+            candidateSinceMs = null
+            return CardioGuidanceOutput(current, bpm, target)
+        }
+
+        if (candidate != desired) {
+            candidate = desired
+            candidateSinceMs = nowMs
+        }
+        val since = checkNotNull(candidateSinceMs)
+        if (nowMs - since >= confirmationMs) {
+            current = desired
+            candidate = null
+            candidateSinceMs = null
+        }
+
+        return CardioGuidanceOutput(
+            instruction = current,
+            bpm = bpm,
+            target = target,
+            pendingInstruction = candidate,
+        )
+    }
+
+    private fun desiredInstruction(
+        target: CardioTargetSnapshot,
+        bpm: Int,
+    ): CardioGuidanceInstruction {
+        // A target entered from either side immediately trends toward MAINTAIN.
+        if (bpm in target.minimumBpm..target.maximumBpm) {
+            return CardioGuidanceInstruction.MAINTAIN
+        }
+
+        return when (current) {
+            CardioGuidanceInstruction.ACCELERATE ->
+                if (bpm >= target.minimumBpm + hysteresisBpm) {
+                    CardioGuidanceInstruction.MAINTAIN
+                } else {
+                    CardioGuidanceInstruction.ACCELERATE
+                }
+
+            CardioGuidanceInstruction.SLOW_DOWN ->
+                if (bpm <= target.maximumBpm - hysteresisBpm) {
+                    CardioGuidanceInstruction.MAINTAIN
+                } else {
+                    CardioGuidanceInstruction.SLOW_DOWN
+                }
+
+            CardioGuidanceInstruction.MAINTAIN,
+            CardioGuidanceInstruction.SUSPENDED ->
+                when {
+                    bpm < target.minimumBpm - hysteresisBpm ->
+                        CardioGuidanceInstruction.ACCELERATE
+                    bpm > target.maximumBpm + hysteresisBpm ->
+                        CardioGuidanceInstruction.SLOW_DOWN
+                    else -> CardioGuidanceInstruction.MAINTAIN
+                }
+        }
+    }
+
+    companion object {
+        const val DEFAULT_HYSTERESIS_BPM = 2
+        const val DEFAULT_CONFIRMATION_MS = 3_000L
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/CardioGuidanceLiveState.kt

@@ -0,0 +1,40 @@
+package com.labfytools.trainlog.data
+
+import com.labfytools.trainlog.model.CardioGuidanceInstruction
+import com.labfytools.trainlog.model.CardioPhaseKind
+import com.labfytools.trainlog.model.CardioTargetSnapshot
+import java.util.concurrent.CopyOnWriteArraySet
+
+internal data class CardioGuidanceLiveSnapshot(
+    val phaseId: String? = null,
+    val phaseKind: CardioPhaseKind? = null,
+    val instruction: CardioGuidanceInstruction = CardioGuidanceInstruction.SUSPENDED,
+    val bpm: Int? = null,
+    val target: CardioTargetSnapshot? = null,
+    val startedAt: String? = null,
+)
+
+internal object CardioGuidanceLiveState {
+    private val listeners =
+        CopyOnWriteArraySet<(CardioGuidanceLiveSnapshot) -> Unit>()
+
+    @Volatile
+    private var snapshot = CardioGuidanceLiveSnapshot()
+
+    fun current(): CardioGuidanceLiveSnapshot = snapshot
+
+    fun publish(next: CardioGuidanceLiveSnapshot) {
+        snapshot = next
+        listeners.forEach { it(next) }
+    }
+
+    fun clear() {
+        publish(CardioGuidanceLiveSnapshot())
+    }
+
+    fun subscribe(listener: (CardioGuidanceLiveSnapshot) -> Unit): AutoCloseable {
+        listeners += listener
+        listener(snapshot)
+        return AutoCloseable { listeners -= listener }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/DriveSyncTransport.kt

@@ -0,0 +1,378 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.util.Log
+import androidx.documentfile.provider.DocumentFile
+import androidx.work.Constraints
+import androidx.work.CoroutineWorker
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.NetworkType
+import androidx.work.PeriodicWorkRequestBuilder
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.WorkManager
+import androidx.work.WorkerParameters
+import java.io.File
+import java.io.FileOutputStream
+import java.nio.file.AtomicMoveNotSupportedException
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
+import java.security.MessageDigest
+import java.time.Duration
+import java.util.UUID
+import java.util.concurrent.atomic.AtomicBoolean
+import java.util.concurrent.TimeUnit
+import org.json.JSONObject
+
+internal class DriveSyncSettings(private val context: Context) {
+    private val preferences = context.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
+
+    val treeUri: Uri? get() = preferences.getString(TREE, null)?.let(Uri::parse)
+    val connected: Boolean get() = treeUri != null
+
+    fun connect(uri: Uri) {
+        context.contentResolver.takePersistableUriPermission(
+            uri,
+            Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION,
+        )
+        preferences.edit().putString(TREE, uri.toString()).apply()
+        schedule(context)
+    }
+
+    fun disconnect() {
+        treeUri?.let { uri ->
+            runCatching {
+                context.contentResolver.releasePersistableUriPermission(
+                    uri,
+                    Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION,
+                )
+            }
+        }
+        preferences.edit().remove(TREE).apply()
+        WorkManager.getInstance(context).cancelUniqueWork(WORK)
+    }
+
+    companion object {
+        private const val PREFERENCES = "trainlog-drive-sync"
+        private const val TREE = "private_tree_uri"
+        private const val WORK = "trainlog-drive-sync-v1"
+
+        fun schedule(context: Context) {
+            val request = PeriodicWorkRequestBuilder<DriveSyncWorker>(15, TimeUnit.MINUTES)
+                .setConstraints(Constraints.Builder().setRequiredNetworkType(NetworkType.CONNECTED).build())
+                .build()
+            WorkManager.getInstance(context).enqueueUniquePeriodicWork(
+                WORK,
+                ExistingPeriodicWorkPolicy.UPDATE,
+                request,
+            )
+            WorkManager.getInstance(context).enqueue(OneTimeWorkRequestBuilder<DriveSyncWorker>().build())
+        }
+    }
+}
+
+/** Byte-only adapter over one user-selected private Drive folder. */
+internal class DriveDocumentTransport(private val context: Context, treeUri: Uri) {
+    private val root = DocumentFile.fromTreeUri(context, treeUri)
+        ?: throw IllegalStateException("Drive folder is unavailable")
+    private val resolver = context.contentResolver
+    private val directories = mutableMapOf("" to root)
+
+    private fun segments(relative: String): List<String> {
+        val parts = relative.split('/')
+        require(parts.size in 1..4 && parts.all { it.isNotEmpty() && it != "." && it != ".." && '\\' !in it })
+        return parts
+    }
+
+    private fun find(relative: String): DocumentFile? {
+        val parts = segments(relative)
+        var parent = root
+        var prefix = ""
+        parts.forEachIndexed { index, name ->
+            if (index == parts.lastIndex) return parent.findFile(name)
+            prefix = if (prefix.isEmpty()) name else "$prefix/$name"
+            parent =
+                directories[prefix]
+                    ?: parent.findFile(name)?.also {
+                        if (it.isDirectory) directories[prefix] = it
+                    }
+                    ?: return null
+        }
+        return null
+    }
+
+    private fun ensureParent(parts: List<String>): DocumentFile {
+        var parent = root
+        var prefix = ""
+        for (name in parts) {
+            prefix = if (prefix.isEmpty()) name else "$prefix/$name"
+            parent =
+                directories[prefix]
+                    ?: parent.findFile(name)
+                    ?: parent.createDirectory(name)
+                    ?: throw IllegalStateException("Cannot create Drive folder")
+            require(parent.isDirectory)
+            directories[prefix] = parent
+        }
+        return parent
+    }
+
+    private fun sha256(file: File): String {
+        val digest = MessageDigest.getInstance("SHA-256")
+        file.inputStream().use { stream ->
+            val buffer = ByteArray(64 * 1024)
+            while (true) {
+                val count = stream.read(buffer)
+                if (count < 0) break
+                digest.update(buffer, 0, count)
+            }
+        }
+        return digest.digest().joinToString("") { "%02x".format(it) }
+    }
+
+    private fun downloadDocument(source: DocumentFile, destination: File): Boolean {
+        if (!source.isFile || source.length() > 64L * 1024L * 1024L) return false
+        destination.parentFile?.mkdirs()
+        val temporary = File(destination.parentFile, ".${destination.name}.drive.tmp-${UUID.randomUUID()}")
+        resolver.openInputStream(source.uri)?.use { input ->
+            FileOutputStream(temporary).use { output -> input.copyTo(output); output.fd.sync() }
+        } ?: return false
+        /* WHY: coordination files are deliberately replaced across runs, and
+         * File.renameTo() does not reliably replace an existing destination.
+         * CONTRACT: consumers observe the old complete file or the newly
+         * downloaded complete file, never a partial provider stream.
+         * INVARIANT: the temporary is unique and on the destination filesystem. */
+        try {
+            Files.move(
+                temporary.toPath(),
+                destination.toPath(),
+                StandardCopyOption.ATOMIC_MOVE,
+                StandardCopyOption.REPLACE_EXISTING,
+            )
+        } catch (_: AtomicMoveNotSupportedException) {
+            Files.move(
+                temporary.toPath(),
+                destination.toPath(),
+                StandardCopyOption.REPLACE_EXISTING,
+            )
+        } catch (error: Exception) {
+            temporary.delete()
+            throw error
+        }
+        return true
+    }
+
+    private fun download(relative: String, destination: File): Boolean =
+        find(relative)?.let { downloadDocument(it, destination) } ?: false
+
+    private fun upload(relative: String, source: File) {
+        require(source.isFile && !java.nio.file.Files.isSymbolicLink(source.toPath()))
+        val parts = segments(relative)
+        val parent = ensureParent(parts.dropLast(1))
+        val destination = parent.findFile(parts.last())
+            ?: parent.createFile("application/json", parts.last())
+            ?: throw IllegalStateException("Cannot create Drive object")
+        resolver.openOutputStream(destination.uri, "wt")?.use { output ->
+            source.inputStream().use { it.copyTo(output) }
+            output.flush()
+        } ?: throw IllegalStateException("Cannot write Drive object")
+        val verification = File.createTempFile("trainlog-drive-verify-", ".json", context.cacheDir)
+        try {
+            /* WHY: some SAF providers do not make a newly created child
+             * discoverable by name immediately. CONTRACT: verification reads
+             * the exact object returned by createFile/findFile above.
+             * INVARIANT: size and SHA-256 are checked before publication can
+             * advance to a manifest or coordination reference. */
+            require(downloadDocument(destination, verification))
+            require(verification.length() == source.length() && sha256(verification) == sha256(source))
+        } finally {
+            verification.delete()
+        }
+    }
+
+    fun pull(localRoot: File) {
+        localRoot.mkdirs()
+        val coordination = listOf(
+            "android-peer-v1.json", "android-generation-v1.json", "android-consumption-ack-v1.json",
+            "android-archive-acknowledgements-v1.json", "android-generation-error-v1.json",
+            "request-v1.json",
+            "desktop-archive-acknowledgements-v1.json", "desktop-consumption-ack-v1.json",
+            "desktop-generation-v1.json",
+        )
+        coordination.forEach { download(it, File(localRoot, it)) }
+        listOf("android-generation-v1.json", "desktop-generation-v1.json").forEach { name ->
+            val reference = File(localRoot, name)
+            if (!reference.isFile || reference.length() > 64 * 1024) return@forEach
+            val value = JSONObject(reference.readText())
+            val relative = value.getString("relative_path")
+            val generationParts = relative.split('/')
+            require(
+                generationParts.size == 3 &&
+                    generationParts[0] in setOf("android-objects", "desktop-objects") &&
+                    generationParts[1] == "generations" &&
+                    generationParts[2] == value.getString("generation_id")
+            )
+            val manifestPath = "$relative/manifest.json"
+            val manifest = File(localRoot, manifestPath)
+            if (!download(manifestPath, manifest)) return@forEach
+            val artifacts = JSONObject(manifest.readText()).getJSONArray("artifacts")
+            require(artifacts.length() <= 32)
+            val generationRelative = "${generationParts[1]}/${generationParts[2]}"
+            for (index in 0 until artifacts.length()) {
+                val filename = artifacts.getJSONObject(index).getString("filename")
+                require(filename.substringBeforeLast('/', "") == generationRelative)
+                val artifactPath = "${generationParts[0]}/$filename"
+                require(download(artifactPath, File(localRoot, artifactPath)))
+            }
+        }
+    }
+
+    fun pushPeer(localRoot: File) {
+        upload("android-peer-v1.json", File(localRoot, "android-peer-v1.json"))
+    }
+
+    fun pushGeneration(localRoot: File) {
+        val reference = File(localRoot, "android-generation-v1.json")
+        require(reference.isFile && reference.length() <= 64 * 1024)
+        val value = JSONObject(reference.readText())
+        val relative = value.getString("relative_path")
+        val parts = relative.split('/')
+        require(
+            parts.size == 3 &&
+                parts[0] == "android-objects" &&
+                parts[1] == "generations" &&
+                parts[2] == value.getString("generation_id")
+        )
+        val generation = File(localRoot, relative)
+        require(generation.isDirectory && !java.nio.file.Files.isSymbolicLink(generation.toPath()))
+        val files =
+            generation.listFiles()?.filter { it.isFile }?.sortedWith(
+                compareBy<File> { it.name == "manifest.json" }
+                    .thenBy { it.name },
+            ) ?: throw IllegalStateException("Drive generation is unavailable")
+        require(files.lastOrNull()?.name == "manifest.json")
+        /* WHY: a Drive tree may contain downloaded desktop objects, stale
+         * generations, and local staging. Uploading that cache made a single
+         * phase exceed WorkManager's execution window and crossed transport
+         * ownership boundaries. CONTRACT: Android publishes only the current
+         * immutable Android generation. INVARIANT: artifacts precede the
+         * manifest commit marker, and the correlated reference is last. */
+        files.forEach { upload("$relative/${it.name}", it) }
+        upload("android-generation-v1.json", reference)
+    }
+
+    fun pushRecoveryAcknowledgements(localRoot: File) {
+        upload(
+            "android-archive-acknowledgements-v1.json",
+            File(localRoot, "android-archive-acknowledgements-v1.json"),
+        )
+    }
+
+    fun pushAcknowledgement(localRoot: File) {
+        upload(
+            "android-consumption-ack-v1.json",
+            File(localRoot, "android-consumption-ack-v1.json"),
+        )
+    }
+}
+
+class DriveSyncWorker(context: Context, parameters: WorkerParameters) :
+    CoroutineWorker(context, parameters) {
+    companion object {
+        /* WHY: reconnecting Drive updates periodic work and also enqueues an
+         * immediate pass; Android may start both before either reaches the
+         * Core conversation lock. CONTRACT: only one Drive byte conversation
+         * runs in this process. INVARIANT: a duplicate trigger invents no
+         * generation and the active worker remains the durable authority. */
+        private val running = AtomicBoolean(false)
+    }
+
+    override suspend fun doWork(): Result {
+        val uri = DriveSyncSettings(applicationContext).treeUri ?: return Result.success()
+        if (!running.compareAndSet(false, true)) return Result.success()
+        val local = File(applicationContext.filesDir, "sync-drive-v1")
+        val transport = DriveDocumentTransport(applicationContext, uri)
+        val repository = TrainlogRepository(applicationContext)
+        var stage = "pull"
+        return try {
+            transport.pull(local)
+            stage = "coordinate"
+            val coordinator = SyncGenerationCoordinator(repository)
+            val terminalLedger = BackgroundSyncRunLedger(applicationContext)
+            coordinator.publishPeer(local)
+            stage = "peer-publication"
+            transport.pushPeer(local)
+            val actionability = coordinator.classifyBackgroundRequest(local, terminalLedger.terminal())
+            if (
+                actionability == BackgroundRequestActionability.NOT_ACTIONABLE ||
+                    actionability == BackgroundRequestActionability.RESUMABLE_BUT_STALE
+            ) {
+                if (coordinator.hasReplayableAcknowledgement(local)) {
+                    stage = "acknowledgement-replay"
+                    transport.pushAcknowledgement(local)
+                }
+                return Result.success()
+            }
+            var lastPull = System.nanoTime()
+            val boundedPull = {
+                val now = System.nanoTime()
+                if (now - lastPull >= Duration.ofSeconds(5).toNanos()) {
+                    transport.pull(local)
+                    lastPull = System.nanoTime()
+                }
+            }
+            val result = coordinator.run(
+                local,
+                Duration.ofMinutes(10),
+                afterPeerPublication = { transport.pushPeer(local) },
+                afterRecoveryAcknowledgements = {
+                    stage = "recovery-acknowledgement"
+                    transport.pushRecoveryAcknowledgements(local)
+                },
+                afterPublication = {
+                    stage = "generation-publication"
+                    transport.pushGeneration(local)
+                },
+                pollTransport = boundedPull,
+                afterAcknowledgement = {
+                    stage = "acknowledgement"
+                    transport.pushAcknowledgement(local)
+                },
+                intent = SyncConversationIntent.RESUME_BACKGROUND,
+            )
+            when (result) {
+                is ForegroundGenerationResult.Completed -> {
+                    terminalLedger.recordTerminal(
+                        result.runId,
+                        coordinator.remoteEvidence(local, result.runId),
+                    )
+                    Result.success()
+                }
+                ForegroundGenerationResult.Busy,
+                is ForegroundGenerationResult.Cancelled -> Result.success()
+                is ForegroundGenerationResult.Superseded -> {
+                    result.runId?.let {
+                        terminalLedger.recordTerminal(it, coordinator.remoteEvidence(local, it))
+                    }
+                    Result.success()
+                }
+                is ForegroundGenerationResult.Failed -> {
+                    result.runId?.let {
+                        terminalLedger.recordTerminal(it, coordinator.remoteEvidence(local, it))
+                    }
+                    Result.retry()
+                }
+            }
+        } catch (error: Exception) {
+            /* SECURITY: stage and exception class are fixed application
+             * metadata.  Provider messages may contain private URIs and are
+             * deliberately never written to logs. */
+            Log.w("TrainlogDriveSync", "Drive sync failed at $stage (${error.javaClass.simpleName})")
+            Result.retry()
+        } finally {
+            repository.close()
+            running.set(false)
+        }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/ExchangeSafTree.kt

@@ -39,6 +39,7 @@ internal fun canonicalExchangeDirectory(): File =
 internal fun exchangeArtifactIdentity(displayName: String): String = when (displayName) {
     "trainlog-exercise-body-zones-v1.json" -> "BODY_ZONES"
     "trainlog-sync-request-v1.json" -> "SYNC_REQUEST"
+    "trainlog-sync-full-generation-request-v1.json" -> "FULL_GENERATION_SYNC_REQUEST"
     "trainlog-mobile-export-v3.json" -> "MOBILE_EXPORT"
     "trainlog-mobile-equipment-definitions-v1.json" -> "EQUIPMENT_DEFINITIONS"
     "trainlog-equipment-associations-v2.json" -> "EQUIPMENT_ASSOCIATIONS"

android/app/src/main/java/com/labfytools/trainlog/data/HeartRateBleDiagnostics.kt

@@ -0,0 +1,482 @@
+/*
+ * Android-only BLE Heart Rate diagnostics.
+ *
+ * This owner is intentionally bounded and screen-scoped. Long-running capture
+ * belongs to the later foreground acquisition service, not this diagnostic.
+ */
+package com.labfytools.trainlog.data
+
+import android.Manifest
+import android.annotation.SuppressLint
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattCallback
+import android.bluetooth.BluetoothGattCharacteristic
+import android.bluetooth.BluetoothGattDescriptor
+import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothProfile
+import android.bluetooth.BluetoothStatusCodes
+import android.bluetooth.le.ScanCallback
+import android.bluetooth.le.ScanFilter
+import android.bluetooth.le.ScanResult
+import android.bluetooth.le.ScanSettings
+import android.content.Context
+import android.content.pm.PackageManager
+import android.os.Build
+import android.os.Handler
+import android.os.Looper
+import android.os.ParcelUuid
+import androidx.core.content.ContextCompat
+import java.util.UUID
+
+internal val HEART_RATE_SERVICE_UUID: UUID =
+    UUID.fromString("0000180d-0000-1000-8000-00805f9b34fb")
+internal val HEART_RATE_MEASUREMENT_UUID: UUID =
+    UUID.fromString("00002a37-0000-1000-8000-00805f9b34fb")
+internal val BATTERY_SERVICE_UUID: UUID =
+    UUID.fromString("0000180f-0000-1000-8000-00805f9b34fb")
+internal val CLIENT_CHARACTERISTIC_CONFIG_UUID: UUID =
+    UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")
+
+internal enum class HeartRateDiagnosticPhase {
+    IDLE,
+    SCANNING,
+    CONNECTING,
+    DISCOVERING,
+    SUBSCRIBING,
+    RECEIVING,
+    DISCONNECTED,
+    ERROR,
+}
+
+internal data class HeartRateDiagnosticDevice(
+    val address: String,
+    val name: String?,
+    val rssi: Int,
+    val advertisesHeartRate: Boolean,
+)
+
+internal data class HeartRateDiagnosticSnapshot(
+    val phase: HeartRateDiagnosticPhase = HeartRateDiagnosticPhase.IDLE,
+    val devices: List<HeartRateDiagnosticDevice> = emptyList(),
+    val selectedAddress: String? = null,
+    val serviceFound: Boolean = false,
+    val measurementFound: Boolean = false,
+    val batteryServiceFound: Boolean = false,
+    val notificationCount: Int = 0,
+    val latestMeasurement: ParsedHeartRateMeasurement? = null,
+    val diagnostic: String? = null,
+)
+
+internal fun heartRateBleRuntimePermissions(): Array<String> =
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+        arrayOf(Manifest.permission.BLUETOOTH_SCAN, Manifest.permission.BLUETOOTH_CONNECT)
+    } else {
+        arrayOf(Manifest.permission.ACCESS_FINE_LOCATION)
+    }
+
+internal fun hasHeartRateBleRuntimePermissions(context: Context): Boolean =
+    heartRateBleRuntimePermissions().all {
+        ContextCompat.checkSelfPermission(context, it) == PackageManager.PERMISSION_GRANTED
+    }
+
+internal class HeartRateBleDiagnostics(
+    context: Context,
+    private val onSnapshot: (HeartRateDiagnosticSnapshot) -> Unit,
+) : AutoCloseable {
+    private val appContext = context.applicationContext
+    private val main = Handler(Looper.getMainLooper())
+    private val bluetoothManager =
+        appContext.getSystemService(BluetoothManager::class.java)
+    private val adapter get() = bluetoothManager?.adapter
+    private val devices = linkedMapOf<String, BluetoothDevice>()
+    private var snapshot = HeartRateDiagnosticSnapshot()
+    private var scannerCallback: ScanCallback? = null
+    private var scanStop: Runnable? = null
+    private var gatt: BluetoothGatt? = null
+    private var closed = false
+
+    private fun update(transform: (HeartRateDiagnosticSnapshot) -> HeartRateDiagnosticSnapshot) {
+        if (closed) return
+        if (Looper.myLooper() != Looper.getMainLooper()) {
+            main.post { update(transform) }
+            return
+        }
+        snapshot = transform(snapshot)
+        onSnapshot(snapshot)
+    }
+
+    @SuppressLint("MissingPermission")
+    fun startScan(includeAllBle: Boolean = false) {
+        if (!hasHeartRateBleRuntimePermissions(appContext)) {
+            update { it.copy(phase = HeartRateDiagnosticPhase.ERROR, diagnostic = "permission") }
+            return
+        }
+        val currentAdapter = adapter
+        if (currentAdapter == null) {
+            update { it.copy(phase = HeartRateDiagnosticPhase.ERROR, diagnostic = "bluetooth_unavailable") }
+            return
+        }
+        if (!currentAdapter.isEnabled) {
+            update { it.copy(phase = HeartRateDiagnosticPhase.ERROR, diagnostic = "bluetooth_disabled") }
+            return
+        }
+        val scanner = currentAdapter.bluetoothLeScanner
+        if (scanner == null) {
+            update { it.copy(phase = HeartRateDiagnosticPhase.ERROR, diagnostic = "scanner_unavailable") }
+            return
+        }
+
+        stopScan()
+        devices.clear()
+        update {
+            HeartRateDiagnosticSnapshot(
+                phase = HeartRateDiagnosticPhase.SCANNING,
+                diagnostic = if (includeAllBle) "scan_all" else "scan_heart_rate",
+            )
+        }
+
+        val callback =
+            object : ScanCallback() {
+                override fun onScanResult(callbackType: Int, result: ScanResult) {
+                    handleScanResult(result)
+                }
+
+                override fun onBatchScanResults(results: MutableList<ScanResult>) {
+                    results.forEach(::handleScanResult)
+                }
+
+                override fun onScanFailed(errorCode: Int) {
+                    update {
+                        it.copy(
+                            phase = HeartRateDiagnosticPhase.ERROR,
+                            diagnostic = "scan_failed:" + errorCode,
+                        )
+                    }
+                }
+            }
+        scannerCallback = callback
+        val filters =
+            if (includeAllBle) {
+                emptyList()
+            } else {
+                listOf(
+                    ScanFilter.Builder()
+                        .setServiceUuid(ParcelUuid(HEART_RATE_SERVICE_UUID))
+                        .build(),
+                )
+            }
+        scanner.startScan(
+            filters,
+            ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY).build(),
+            callback,
+        )
+        val stopper =
+            Runnable {
+                if (snapshot.phase == HeartRateDiagnosticPhase.SCANNING) {
+                    stopScan()
+                    update { it.copy(phase = HeartRateDiagnosticPhase.IDLE, diagnostic = "scan_complete") }
+                }
+            }
+        scanStop = stopper
+        main.postDelayed(stopper, SCAN_DURATION_MS)
+    }
+
+    @SuppressLint("MissingPermission")
+    private fun handleScanResult(result: ScanResult) {
+        val record = result.scanRecord
+        val advertised =
+            record?.serviceUuids?.any { it.uuid == HEART_RATE_SERVICE_UUID } == true
+        val device = result.device
+        devices[device.address] = device
+        val row =
+            HeartRateDiagnosticDevice(
+                address = device.address,
+                name = record?.deviceName,
+                rssi = result.rssi,
+                advertisesHeartRate = advertised,
+            )
+        update { old ->
+            val rows =
+                (old.devices.filterNot { it.address == row.address } + row)
+                    .sortedWith(
+                        compareByDescending<HeartRateDiagnosticDevice> { it.advertisesHeartRate }
+                            .thenByDescending { it.rssi },
+                    )
+            old.copy(devices = rows)
+        }
+    }
+
+    @SuppressLint("MissingPermission")
+    fun connect(address: String) {
+        if (!hasHeartRateBleRuntimePermissions(appContext)) {
+            update { it.copy(phase = HeartRateDiagnosticPhase.ERROR, diagnostic = "permission") }
+            return
+        }
+        val device =
+            devices[address]
+                ?: runCatching { adapter?.getRemoteDevice(address) }.getOrNull()
+                ?: run {
+                    update { it.copy(phase = HeartRateDiagnosticPhase.ERROR, diagnostic = "device_missing") }
+                    return
+                }
+        stopScan()
+        closeGatt()
+        update {
+            it.copy(
+                phase = HeartRateDiagnosticPhase.CONNECTING,
+                selectedAddress = address,
+                serviceFound = false,
+                measurementFound = false,
+                batteryServiceFound = false,
+                notificationCount = 0,
+                latestMeasurement = null,
+                diagnostic = "connecting",
+            )
+        }
+        @Suppress("DEPRECATION")
+        runCatching {
+                device.connectGatt(
+                    appContext,
+                    false,
+                    gattCallback,
+                    BluetoothDevice.TRANSPORT_LE,
+                )
+            }
+            .onSuccess { gatt = it }
+            .onFailure { error ->
+                update {
+                    it.copy(
+                        phase = HeartRateDiagnosticPhase.ERROR,
+                        diagnostic = "connect_failed:" + error.javaClass.simpleName,
+                    )
+                }
+            }
+    }
+
+    private val gattCallback =
+        object : BluetoothGattCallback() {
+            @SuppressLint("MissingPermission")
+            override fun onConnectionStateChange(
+                callbackGatt: BluetoothGatt,
+                status: Int,
+                newState: Int,
+            ) {
+                main.post {
+                    if (closed || callbackGatt !== gatt) return@post
+                    if (status == BluetoothGatt.GATT_SUCCESS &&
+                        newState == BluetoothProfile.STATE_CONNECTED
+                    ) {
+                        update {
+                            it.copy(
+                                phase = HeartRateDiagnosticPhase.DISCOVERING,
+                                diagnostic = "connected",
+                            )
+                        }
+                        if (!callbackGatt.discoverServices()) {
+                            update {
+                                it.copy(
+                                    phase = HeartRateDiagnosticPhase.ERROR,
+                                    diagnostic = "discover_start_failed",
+                                )
+                            }
+                        }
+                    } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
+                        update {
+                            it.copy(
+                                phase = HeartRateDiagnosticPhase.DISCONNECTED,
+                                diagnostic = "disconnected:" + status,
+                            )
+                        }
+                        closeGatt()
+                    } else if (status != BluetoothGatt.GATT_SUCCESS) {
+                        update {
+                            it.copy(
+                                phase = HeartRateDiagnosticPhase.ERROR,
+                                diagnostic = "gatt_status:" + status,
+                            )
+                        }
+                        closeGatt()
+                    }
+                }
+            }
+
+            @SuppressLint("MissingPermission")
+            override fun onServicesDiscovered(callbackGatt: BluetoothGatt, status: Int) {
+                main.post {
+                    if (closed || callbackGatt !== gatt) return@post
+                    if (status != BluetoothGatt.GATT_SUCCESS) {
+                        update {
+                            it.copy(
+                                phase = HeartRateDiagnosticPhase.ERROR,
+                                diagnostic = "service_discovery:" + status,
+                            )
+                        }
+                        return@post
+                    }
+                    val service = callbackGatt.getService(HEART_RATE_SERVICE_UUID)
+                    val measurement = service?.getCharacteristic(HEART_RATE_MEASUREMENT_UUID)
+                    val battery = callbackGatt.getService(BATTERY_SERVICE_UUID) != null
+                    update {
+                        it.copy(
+                            serviceFound = service != null,
+                            measurementFound = measurement != null,
+                            batteryServiceFound = battery,
+                        )
+                    }
+                    if (measurement == null) {
+                        update {
+                            it.copy(
+                                phase = HeartRateDiagnosticPhase.ERROR,
+                                diagnostic = "heart_rate_measurement_missing",
+                            )
+                        }
+                        return@post
+                    }
+                    subscribe(callbackGatt, measurement)
+                }
+            }
+
+            override fun onDescriptorWrite(
+                callbackGatt: BluetoothGatt,
+                descriptor: BluetoothGattDescriptor,
+                status: Int,
+            ) {
+                if (descriptor.uuid != CLIENT_CHARACTERISTIC_CONFIG_UUID) return
+                update {
+                    if (status == BluetoothGatt.GATT_SUCCESS) {
+                        it.copy(
+                            phase = HeartRateDiagnosticPhase.RECEIVING,
+                            diagnostic = "notifications_enabled",
+                        )
+                    } else {
+                        it.copy(
+                            phase = HeartRateDiagnosticPhase.ERROR,
+                            diagnostic = "descriptor_write:" + status,
+                        )
+                    }
+                }
+            }
+
+            @Deprecated("Deprecated by Android API 33 callback with explicit value")
+            override fun onCharacteristicChanged(
+                callbackGatt: BluetoothGatt,
+                characteristic: BluetoothGattCharacteristic,
+            ) {
+                @Suppress("DEPRECATION")
+                val value = characteristic.value ?: return
+                handleMeasurement(characteristic.uuid, value)
+            }
+
+            override fun onCharacteristicChanged(
+                callbackGatt: BluetoothGatt,
+                characteristic: BluetoothGattCharacteristic,
+                value: ByteArray,
+            ) {
+                handleMeasurement(characteristic.uuid, value)
+            }
+        }
+
+    @SuppressLint("MissingPermission")
+    private fun subscribe(
+        callbackGatt: BluetoothGatt,
+        measurement: BluetoothGattCharacteristic,
+    ) {
+        if (!callbackGatt.setCharacteristicNotification(measurement, true)) {
+            update {
+                it.copy(
+                    phase = HeartRateDiagnosticPhase.ERROR,
+                    diagnostic = "notification_enable_failed",
+                )
+            }
+            return
+        }
+        val descriptor = measurement.getDescriptor(CLIENT_CHARACTERISTIC_CONFIG_UUID)
+        if (descriptor == null) {
+            update {
+                it.copy(
+                    phase = HeartRateDiagnosticPhase.ERROR,
+                    diagnostic = "ccc_descriptor_missing",
+                )
+            }
+            return
+        }
+        update {
+            it.copy(
+                phase = HeartRateDiagnosticPhase.SUBSCRIBING,
+                diagnostic = "enabling_notifications",
+            )
+        }
+        val started =
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                callbackGatt.writeDescriptor(
+                    descriptor,
+                    BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE,
+                ) == BluetoothStatusCodes.SUCCESS
+            } else {
+                @Suppress("DEPRECATION")
+                run {
+                    descriptor.value = BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
+                    callbackGatt.writeDescriptor(descriptor)
+                }
+            }
+        if (!started) {
+            update {
+                it.copy(
+                    phase = HeartRateDiagnosticPhase.ERROR,
+                    diagnostic = "descriptor_write_start_failed",
+                )
+            }
+        }
+    }
+
+    private fun handleMeasurement(uuid: UUID, value: ByteArray) {
+        if (uuid != HEART_RATE_MEASUREMENT_UUID) return
+        when (val parsed = HeartRateMeasurementParser.parse(value)) {
+            is HeartRateMeasurementParseResult.Invalid ->
+                update {
+                    it.copy(
+                        phase = HeartRateDiagnosticPhase.ERROR,
+                        diagnostic = "measurement:" + parsed.reason,
+                    )
+                }
+            is HeartRateMeasurementParseResult.Parsed ->
+                update {
+                    it.copy(
+                        phase = HeartRateDiagnosticPhase.RECEIVING,
+                        notificationCount = it.notificationCount + 1,
+                        latestMeasurement = parsed.measurement,
+                        diagnostic = "measurement",
+                    )
+                }
+        }
+    }
+
+    @SuppressLint("MissingPermission")
+    fun stopScan() {
+        val callback = scannerCallback ?: return
+        scanStop?.let(main::removeCallbacks)
+        scanStop = null
+        runCatching { adapter?.bluetoothLeScanner?.stopScan(callback) }
+        scannerCallback = null
+    }
+
+    @SuppressLint("MissingPermission")
+    private fun closeGatt() {
+        val current = gatt
+        gatt = null
+        runCatching { current?.disconnect() }
+        runCatching { current?.close() }
+    }
+
+    override fun close() {
+        if (closed) return
+        stopScan()
+        closeGatt()
+        closed = true
+    }
+
+    private companion object {
+        const val SCAN_DURATION_MS = 10_000L
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/HeartRateLiveState.kt

@@ -0,0 +1,80 @@
+package com.labfytools.trainlog.data
+
+import java.util.concurrent.CopyOnWriteArraySet
+
+internal enum class HeartRateLivePhase {
+    DISCONNECTED,
+    CONNECTING,
+    CONNECTED,
+    STALE,
+}
+
+internal data class HeartRateLiveSnapshot(
+    val phase: HeartRateLivePhase = HeartRateLivePhase.DISCONNECTED,
+    val bpm: Int? = null,
+    val rrIntervals1024: List<Int> = emptyList(),
+    val sensorContactDetected: Boolean? = null,
+    val energyExpended: Int? = null,
+    val notificationCount: Long = 0,
+)
+
+internal object HeartRateLiveState {
+    private val listeners =
+        CopyOnWriteArraySet<(HeartRateLiveSnapshot) -> Unit>()
+
+    @Volatile
+    private var snapshot = HeartRateLiveSnapshot()
+
+    fun current(): HeartRateLiveSnapshot = snapshot
+
+    fun publish(next: HeartRateLiveSnapshot) {
+        snapshot = next
+        listeners.forEach { it(next) }
+    }
+
+    fun subscribe(listener: (HeartRateLiveSnapshot) -> Unit): AutoCloseable {
+        listeners += listener
+        listener(snapshot)
+        return AutoCloseable { listeners -= listener }
+    }
+
+    fun disconnected() {
+        publish(HeartRateLiveSnapshot(phase = HeartRateLivePhase.DISCONNECTED))
+    }
+
+    fun connecting() {
+        publish(
+            snapshot.copy(
+                phase = HeartRateLivePhase.CONNECTING,
+                bpm = null,
+                rrIntervals1024 = emptyList(),
+                sensorContactDetected = null,
+                energyExpended = null,
+            ),
+        )
+    }
+
+    fun measurement(measurement: ParsedHeartRateMeasurement) {
+        publish(
+            HeartRateLiveSnapshot(
+                phase = HeartRateLivePhase.CONNECTED,
+                bpm = measurement.bpm,
+                rrIntervals1024 = measurement.rrIntervals1024,
+                sensorContactDetected = measurement.sensorContactDetected,
+                energyExpended = measurement.energyExpended,
+                notificationCount = snapshot.notificationCount + 1,
+            ),
+        )
+    }
+
+    fun stale() {
+        if (snapshot.phase == HeartRateLivePhase.CONNECTED) {
+            publish(
+                snapshot.copy(
+                    phase = HeartRateLivePhase.STALE,
+                    bpm = null,
+                ),
+            )
+        }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/HeartRateMeasurementParser.kt

@@ -0,0 +1,103 @@
+/*
+ * Bluetooth Heart Rate Measurement parser.
+ *
+ * This file deliberately has no Android Bluetooth dependency so protocol
+ * decoding can be exhaustively unit-tested independently of GATT transport.
+ */
+package com.labfytools.trainlog.data
+
+internal data class ParsedHeartRateMeasurement(
+    val bpm: Int,
+    val sensorContactDetected: Boolean?,
+    val energyExpended: Int?,
+    /** Raw Bluetooth Heart Rate Service units: 1/1024 second. */
+    val rrIntervals1024: List<Int>,
+)
+
+internal sealed interface HeartRateMeasurementParseResult {
+    data class Parsed(val measurement: ParsedHeartRateMeasurement) :
+        HeartRateMeasurementParseResult
+    data class Invalid(val reason: String) : HeartRateMeasurementParseResult
+}
+
+internal object HeartRateMeasurementParser {
+    private const val FLAG_HEART_RATE_16_BIT = 1 shl 0
+    private const val FLAG_CONTACT_DETECTED = 1 shl 1
+    private const val FLAG_CONTACT_SUPPORTED = 1 shl 2
+    private const val FLAG_ENERGY_PRESENT = 1 shl 3
+    private const val FLAG_RR_PRESENT = 1 shl 4
+    private const val KNOWN_FLAGS =
+        FLAG_HEART_RATE_16_BIT or FLAG_CONTACT_DETECTED or FLAG_CONTACT_SUPPORTED or
+            FLAG_ENERGY_PRESENT or FLAG_RR_PRESENT
+
+    fun parse(payload: ByteArray): HeartRateMeasurementParseResult {
+        if (payload.isEmpty()) return HeartRateMeasurementParseResult.Invalid("missing flags")
+        val flags = payload[0].toInt() and 0xff
+        if ((flags and KNOWN_FLAGS.inv()) != 0) {
+            return HeartRateMeasurementParseResult.Invalid("reserved flags are set")
+        }
+
+        var offset = 1
+        fun uint8(): Int? =
+            payload.getOrNull(offset)?.let {
+                offset += 1
+                it.toInt() and 0xff
+            }
+        fun uint16(): Int? {
+            if (offset + 2 > payload.size) return null
+            val value =
+                (payload[offset].toInt() and 0xff) or
+                    ((payload[offset + 1].toInt() and 0xff) shl 8)
+            offset += 2
+            return value
+        }
+
+        val bpm =
+            if ((flags and FLAG_HEART_RATE_16_BIT) != 0) {
+                uint16() ?: return HeartRateMeasurementParseResult.Invalid("truncated 16-bit BPM")
+            } else {
+                uint8() ?: return HeartRateMeasurementParseResult.Invalid("missing BPM")
+            }
+
+        val contact =
+            if ((flags and FLAG_CONTACT_SUPPORTED) == 0) {
+                null
+            } else {
+                (flags and FLAG_CONTACT_DETECTED) != 0
+            }
+
+        val energy =
+            if ((flags and FLAG_ENERGY_PRESENT) != 0) {
+                uint16()
+                    ?: return HeartRateMeasurementParseResult.Invalid(
+                        "truncated energy-expended value",
+                    )
+            } else {
+                null
+            }
+
+        val rr = mutableListOf<Int>()
+        if ((flags and FLAG_RR_PRESENT) != 0) {
+            if (offset == payload.size) {
+                return HeartRateMeasurementParseResult.Invalid("RR flag has no interval")
+            }
+            if ((payload.size - offset) % 2 != 0) {
+                return HeartRateMeasurementParseResult.Invalid("truncated RR interval")
+            }
+            while (offset < payload.size) {
+                rr += checkNotNull(uint16())
+            }
+        } else if (offset != payload.size) {
+            return HeartRateMeasurementParseResult.Invalid("unexpected trailing bytes")
+        }
+
+        return HeartRateMeasurementParseResult.Parsed(
+            ParsedHeartRateMeasurement(
+                bpm = bpm,
+                sensorContactDetected = contact,
+                energyExpended = energy,
+                rrIntervals1024 = rr,
+            ),
+        )
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/HeartRateSensorPreferences.kt

@@ -0,0 +1,46 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+
+internal data class SelectedHeartRateSensor(
+    val address: String,
+    val name: String?,
+)
+
+internal class HeartRateSensorPreferences(context: Context) {
+    private val preferences =
+        context.applicationContext.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
+
+    fun selected(): SelectedHeartRateSensor? {
+        if (!preferences.getBoolean(ENABLED, false)) return null
+        val address = preferences.getString(ADDRESS, null)?.takeIf { it.isNotBlank() } ?: return null
+        return SelectedHeartRateSensor(
+            address = address,
+            name = preferences.getString(NAME, null)?.takeIf { it.isNotBlank() },
+        )
+    }
+
+    fun select(address: String, name: String?) {
+        require(address.isNotBlank())
+        preferences.edit()
+            .putBoolean(ENABLED, true)
+            .putString(ADDRESS, address)
+            .putString(NAME, name?.takeIf { it.isNotBlank() })
+            .apply()
+    }
+
+    fun clear() {
+        preferences.edit()
+            .putBoolean(ENABLED, false)
+            .remove(ADDRESS)
+            .remove(NAME)
+            .apply()
+    }
+
+    companion object {
+        private const val PREFERENCES = "trainlog-heart-rate-sensor"
+        private const val ENABLED = "enabled"
+        private const val ADDRESS = "address"
+        private const val NAME = "name"
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/HeartRateSensorService.kt

@@ -0,0 +1,561 @@
+package com.labfytools.trainlog.data
+
+import android.annotation.SuppressLint
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.Service
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothGatt
+import android.bluetooth.BluetoothGattCallback
+import android.bluetooth.BluetoothGattCharacteristic
+import android.bluetooth.BluetoothGattDescriptor
+import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothProfile
+import android.bluetooth.BluetoothStatusCodes
+import android.content.Context
+import android.content.Intent
+import android.content.pm.ServiceInfo
+import android.os.Build
+import android.os.Handler
+import android.os.IBinder
+import android.os.Looper
+import android.os.SystemClock
+import androidx.core.app.NotificationCompat
+import androidx.core.content.ContextCompat
+import com.labfytools.trainlog.R
+import com.labfytools.trainlog.model.CardioGuidanceInstruction
+import java.time.Duration
+import java.time.OffsetDateTime
+
+class HeartRateSensorService : Service() {
+    private val main = Handler(Looper.getMainLooper())
+    private val preferences by lazy { HeartRateSensorPreferences(applicationContext) }
+    private val bluetoothManager by lazy {
+        applicationContext.getSystemService(BluetoothManager::class.java)
+    }
+
+    private var selected: SelectedHeartRateSensor? = null
+    private var gatt: BluetoothGatt? = null
+    private var reconnectAttempt = 0
+    private var lastMeasurementElapsed = 0L
+    private var lastNotificationBpm: Int? = null
+    private var repository: TrainlogRepository? = null
+    private var guidancePhaseId: String? = null
+    private var guidanceEngine: CardioGuidanceEngine? = null
+
+    private fun repository(): TrainlogRepository =
+        repository ?: TrainlogRepository(applicationContext).also { repository = it }
+
+    private val reconnectRunnable = Runnable { connectSelected() }
+    private val connectionTimeoutRunnable =
+        Runnable {
+            if (HeartRateLiveState.current().phase == HeartRateLivePhase.CONNECTING) {
+                closeGatt()
+                scheduleReconnect()
+            }
+        }
+    private val staleRunnable =
+        object : Runnable {
+            override fun run() {
+                val last = lastMeasurementElapsed
+                if (last > 0L) {
+                    val age = SystemClock.elapsedRealtime() - last
+                    if (
+                        age >= STALE_AFTER_MS &&
+                        HeartRateLiveState.current().phase == HeartRateLivePhase.CONNECTED
+                    ) {
+                        HeartRateLiveState.stale()
+                        suspendCardioGuidance()
+                        updateForegroundNotification()
+                    }
+                    if (age >= STALE_RECONNECT_AFTER_MS && gatt != null) {
+                        lastMeasurementElapsed = 0L
+                        closeGatt()
+                        scheduleReconnect()
+                    }
+                }
+                main.postDelayed(this, STALE_CHECK_MS)
+            }
+        }
+
+    override fun onCreate() {
+        super.onCreate()
+        createChannel()
+        promoteForeground()
+        main.post(staleRunnable)
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        if (intent?.action == ACTION_STOP) {
+            stopSelf()
+            return START_NOT_STICKY
+        }
+
+        selected = preferences.selected()
+        if (selected == null || !hasHeartRateBleRuntimePermissions(this)) {
+            HeartRateLiveState.disconnected()
+            updateForegroundNotification()
+            stopSelf()
+            return START_NOT_STICKY
+        }
+        if (bluetoothManager.adapter?.isEnabled != true) {
+            scheduleReconnect()
+            return START_STICKY
+        }
+
+        promoteForeground()
+        if (gatt == null) connectSelected()
+        return START_STICKY
+    }
+
+    @SuppressLint("MissingPermission")
+    @Suppress("DEPRECATION")
+    private fun connectSelected() {
+        main.removeCallbacks(reconnectRunnable)
+        main.removeCallbacks(connectionTimeoutRunnable)
+
+        val sensor = preferences.selected()
+        selected = sensor
+        val adapter = bluetoothManager.adapter
+        if (sensor == null || !hasHeartRateBleRuntimePermissions(this)) {
+            HeartRateLiveState.disconnected()
+            updateForegroundNotification()
+            stopSelf()
+            return
+        }
+        if (adapter?.isEnabled != true) {
+            scheduleReconnect()
+            return
+        }
+
+        closeGatt()
+        lastMeasurementElapsed = 0L
+        HeartRateLiveState.connecting()
+        updateForegroundNotification()
+
+        val device =
+            runCatching { adapter.getRemoteDevice(sensor.address) }.getOrNull()
+                ?: run {
+                    HeartRateLiveState.disconnected()
+                    scheduleReconnect()
+                    return
+                }
+
+        runCatching {
+                device.connectGatt(
+                    applicationContext,
+                    false,
+                    gattCallback,
+                    BluetoothDevice.TRANSPORT_LE,
+                )
+            }
+            .onSuccess {
+                gatt = it
+                main.postDelayed(connectionTimeoutRunnable, CONNECTION_TIMEOUT_MS)
+            }
+            .onFailure {
+                scheduleReconnect()
+            }
+    }
+
+    private val gattCallback =
+        object : BluetoothGattCallback() {
+            @SuppressLint("MissingPermission")
+            override fun onConnectionStateChange(
+                callbackGatt: BluetoothGatt,
+                status: Int,
+                newState: Int,
+            ) {
+                main.post {
+                    if (callbackGatt !== gatt) return@post
+                    if (
+                        status == BluetoothGatt.GATT_SUCCESS &&
+                        newState == BluetoothProfile.STATE_CONNECTED
+                    ) {
+                        reconnectAttempt = 0
+                        main.removeCallbacks(connectionTimeoutRunnable)
+                        HeartRateLiveState.connecting()
+                        updateForegroundNotification()
+                        if (!callbackGatt.discoverServices()) {
+                            failConnection()
+                        } else {
+                            main.postDelayed(connectionTimeoutRunnable, CONNECTION_TIMEOUT_MS)
+                        }
+                    } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
+                        failConnection()
+                    } else if (status != BluetoothGatt.GATT_SUCCESS) {
+                        failConnection()
+                    }
+                }
+            }
+
+            @SuppressLint("MissingPermission")
+            override fun onServicesDiscovered(callbackGatt: BluetoothGatt, status: Int) {
+                main.post {
+                    if (callbackGatt !== gatt) return@post
+                    if (status != BluetoothGatt.GATT_SUCCESS) {
+                        failConnection()
+                        return@post
+                    }
+                    val measurement =
+                        callbackGatt
+                            .getService(HEART_RATE_SERVICE_UUID)
+                            ?.getCharacteristic(HEART_RATE_MEASUREMENT_UUID)
+                    if (measurement == null) {
+                        failConnection()
+                        return@post
+                    }
+                    main.removeCallbacks(connectionTimeoutRunnable)
+                    if (!subscribe(callbackGatt, measurement)) {
+                        failConnection()
+                    } else {
+                        main.postDelayed(connectionTimeoutRunnable, CONNECTION_TIMEOUT_MS)
+                    }
+                }
+            }
+
+            override fun onDescriptorWrite(
+                callbackGatt: BluetoothGatt,
+                descriptor: BluetoothGattDescriptor,
+                status: Int,
+            ) {
+                if (descriptor.uuid != CLIENT_CHARACTERISTIC_CONFIG_UUID) return
+                main.post {
+                    if (callbackGatt !== gatt) return@post
+                    if (status != BluetoothGatt.GATT_SUCCESS) {
+                        failConnection()
+                    } else {
+                        main.removeCallbacks(connectionTimeoutRunnable)
+                        HeartRateLiveState.connecting()
+                        updateForegroundNotification()
+                    }
+                }
+            }
+
+            @Deprecated("Deprecated by Android API 33 callback with explicit value")
+            override fun onCharacteristicChanged(
+                callbackGatt: BluetoothGatt,
+                characteristic: BluetoothGattCharacteristic,
+            ) {
+                @Suppress("DEPRECATION")
+                val value = characteristic.value ?: return
+                onHeartRateNotification(callbackGatt, characteristic.uuid, value)
+            }
+
+            override fun onCharacteristicChanged(
+                callbackGatt: BluetoothGatt,
+                characteristic: BluetoothGattCharacteristic,
+                value: ByteArray,
+            ) {
+                onHeartRateNotification(callbackGatt, characteristic.uuid, value)
+            }
+        }
+
+    @SuppressLint("MissingPermission")
+    private fun subscribe(
+        callbackGatt: BluetoothGatt,
+        measurement: BluetoothGattCharacteristic,
+    ): Boolean {
+        if (!callbackGatt.setCharacteristicNotification(measurement, true)) return false
+        val descriptor = measurement.getDescriptor(CLIENT_CHARACTERISTIC_CONFIG_UUID) ?: return false
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            callbackGatt.writeDescriptor(
+                descriptor,
+                BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE,
+            ) == BluetoothStatusCodes.SUCCESS
+        } else {
+            @Suppress("DEPRECATION")
+            run {
+                descriptor.value = BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
+                callbackGatt.writeDescriptor(descriptor)
+            }
+        }
+    }
+
+    private fun onHeartRateNotification(
+        callbackGatt: BluetoothGatt,
+        uuid: java.util.UUID,
+        value: ByteArray,
+    ) {
+        if (callbackGatt !== gatt || uuid != HEART_RATE_MEASUREMENT_UUID) return
+        val parsed = HeartRateMeasurementParser.parse(value)
+        if (parsed !is HeartRateMeasurementParseResult.Parsed) return
+        lastMeasurementElapsed = SystemClock.elapsedRealtime()
+        HeartRateLiveState.measurement(parsed.measurement)
+        val observedAt = OffsetDateTime.now().toString()
+        val repository = repository()
+        val sessionRecorded =
+            repository.recordLiveHeartRateForActiveSession(
+                sensorName = selected?.name,
+                observedAt = observedAt,
+                measurement = parsed.measurement,
+            )
+        if (sessionRecorded != null) {
+            processCardioGuidance(repository, observedAt, parsed.measurement.bpm)
+        } else {
+            repository.recordLiveHeartRateForActiveSleep(
+                sensorName = selected?.name,
+                observedAt = observedAt,
+                measurement = parsed.measurement,
+            )
+            clearCardioGuidanceEngine()
+        }
+        if (lastNotificationBpm != parsed.measurement.bpm) {
+            lastNotificationBpm = parsed.measurement.bpm
+            updateForegroundNotification()
+        }
+    }
+
+
+    private fun processCardioGuidance(
+        repository: TrainlogRepository,
+        observedAt: String,
+        bpm: Int,
+    ) {
+        val phase = repository.activeCardioGuidancePhase()
+        if (phase == null) {
+            clearCardioGuidanceEngine()
+            return
+        }
+        if (guidancePhaseId != phase.phase.phaseId || guidanceEngine == null) {
+            guidancePhaseId = phase.phase.phaseId
+            guidanceEngine =
+                CardioGuidanceEngine(initialInstruction = phase.currentInstruction)
+        }
+        val engine = checkNotNull(guidanceEngine)
+        val output =
+            engine.evaluate(
+                target = phase.phase.target,
+                bpm = bpm,
+                fresh = true,
+                nowMs = SystemClock.elapsedRealtime(),
+            )
+        repository.recordCardioGuidanceOutput(
+            phase.phase.phaseId,
+            observedAt,
+            output,
+        )
+        CardioGuidanceLiveState.publish(
+            CardioGuidanceLiveSnapshot(
+                phaseId = phase.phase.phaseId,
+                phaseKind = phase.phase.kind,
+                instruction = output.instruction,
+                bpm = output.bpm,
+                target = phase.phase.target,
+                startedAt = phase.startedAt,
+            ),
+        )
+        maybeFinishCardioGuidancePhase(repository, phase, observedAt, bpm, fresh = true)
+    }
+
+    private fun suspendCardioGuidance() {
+        val repository = repository ?: return
+        val phase = repository.activeCardioGuidancePhase() ?: run {
+            clearCardioGuidanceEngine()
+            return
+        }
+        if (guidancePhaseId != phase.phase.phaseId || guidanceEngine == null) {
+            guidancePhaseId = phase.phase.phaseId
+            guidanceEngine =
+                CardioGuidanceEngine(initialInstruction = phase.currentInstruction)
+        }
+        val output =
+            checkNotNull(guidanceEngine).evaluate(
+                target = phase.phase.target,
+                bpm = null,
+                fresh = false,
+                nowMs = SystemClock.elapsedRealtime(),
+            )
+        val observedAt = OffsetDateTime.now().toString()
+        repository.recordCardioGuidanceOutput(
+            phase.phase.phaseId,
+            observedAt,
+            output,
+        )
+        CardioGuidanceLiveState.publish(
+            CardioGuidanceLiveSnapshot(
+                phaseId = phase.phase.phaseId,
+                phaseKind = phase.phase.kind,
+                instruction = CardioGuidanceInstruction.SUSPENDED,
+                bpm = null,
+                target = phase.phase.target,
+                startedAt = phase.startedAt,
+            ),
+        )
+        maybeFinishCardioGuidancePhase(repository, phase, observedAt, null, fresh = false)
+    }
+
+    private fun maybeFinishCardioGuidancePhase(
+        repository: TrainlogRepository,
+        phase: com.labfytools.trainlog.model.CardioGuidancePhaseRecord,
+        observedAt: String,
+        bpm: Int?,
+        fresh: Boolean,
+    ) {
+        val elapsedSeconds =
+            runCatching {
+                    Duration.between(
+                        OffsetDateTime.parse(phase.startedAt),
+                        OffsetDateTime.parse(observedAt),
+                    ).seconds
+                }
+                .getOrNull()
+                ?.coerceIn(0L, Int.MAX_VALUE.toLong())
+                ?.toInt()
+                ?: return
+        if (
+            CardioPhaseCompletion.isComplete(
+                phase.phase,
+                elapsedSeconds,
+                bpm,
+                fresh,
+            )
+        ) {
+            repository.finishCardioGuidancePhase(phase.phase.phaseId, observedAt)
+            clearCardioGuidanceEngine()
+        }
+    }
+
+    private fun clearCardioGuidanceEngine() {
+        guidancePhaseId = null
+        guidanceEngine = null
+        CardioGuidanceLiveState.clear()
+    }
+
+    private fun failConnection() {
+        main.removeCallbacks(connectionTimeoutRunnable)
+        closeGatt()
+        lastMeasurementElapsed = 0L
+        lastNotificationBpm = null
+        scheduleReconnect()
+    }
+
+    private fun scheduleReconnect() {
+        if (preferences.selected() == null) {
+            HeartRateLiveState.disconnected()
+            updateForegroundNotification()
+            return
+        }
+        HeartRateLiveState.connecting()
+        updateForegroundNotification()
+        reconnectAttempt = (reconnectAttempt + 1).coerceAtMost(6)
+        val delay =
+            (RECONNECT_BASE_MS * reconnectAttempt.toLong()).coerceAtMost(RECONNECT_MAX_MS)
+        main.removeCallbacks(reconnectRunnable)
+        main.postDelayed(reconnectRunnable, delay)
+    }
+
+    @SuppressLint("MissingPermission")
+    private fun closeGatt() {
+        val current = gatt
+        gatt = null
+        runCatching { current?.disconnect() }
+        runCatching { current?.close() }
+    }
+
+    override fun onDestroy() {
+        main.removeCallbacks(reconnectRunnable)
+        main.removeCallbacks(connectionTimeoutRunnable)
+        main.removeCallbacks(staleRunnable)
+        closeGatt()
+        repository?.close()
+        repository = null
+        HeartRateLiveState.disconnected()
+        super.onDestroy()
+    }
+
+    override fun onBind(intent: Intent?): IBinder? = null
+
+    private fun createChannel() {
+        getSystemService(NotificationManager::class.java)
+            .createNotificationChannel(
+                NotificationChannel(
+                    CHANNEL,
+                    getString(R.string.heart_rate_service_channel),
+                    NotificationManager.IMPORTANCE_LOW,
+                ),
+            )
+    }
+
+    private fun promoteForeground() {
+        val notification = buildNotification()
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            startForeground(
+                NOTIFICATION_ID,
+                notification,
+                ServiceInfo.FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE,
+            )
+        } else {
+            startForeground(NOTIFICATION_ID, notification)
+        }
+    }
+
+    private fun updateForegroundNotification() {
+        runCatching {
+            getSystemService(NotificationManager::class.java)
+                .notify(NOTIFICATION_ID, buildNotification())
+        }
+    }
+
+    private fun buildNotification(): android.app.Notification {
+        val live = HeartRateLiveState.current()
+        val text =
+            when (live.phase) {
+                HeartRateLivePhase.CONNECTED ->
+                    live.bpm?.let { getString(R.string.heart_rate_service_bpm, it) }
+                        ?: getString(R.string.heart_rate_service_connecting)
+                HeartRateLivePhase.CONNECTING ->
+                    getString(R.string.heart_rate_service_connecting)
+                HeartRateLivePhase.STALE ->
+                    getString(R.string.heart_rate_service_reconnecting)
+                HeartRateLivePhase.DISCONNECTED ->
+                    getString(R.string.heart_rate_service_disconnected)
+            }
+        return NotificationCompat.Builder(this, CHANNEL)
+            .setSmallIcon(R.mipmap.ic_launcher)
+            .setContentTitle(getString(R.string.heart_rate_service_title))
+            .setContentText(text)
+            .setOngoing(true)
+            .setOnlyAlertOnce(true)
+            .build()
+    }
+
+    companion object {
+        private const val CHANNEL = "trainlog_heart_rate"
+        private const val NOTIFICATION_ID = 1402
+        private const val ACTION_START = "com.labfytools.trainlog.heart_rate.START"
+        private const val ACTION_STOP = "com.labfytools.trainlog.heart_rate.STOP"
+        private const val CONNECTION_TIMEOUT_MS = 12_000L
+        private const val STALE_AFTER_MS = 3_000L
+        private const val STALE_RECONNECT_AFTER_MS = 8_000L
+        private const val STALE_CHECK_MS = 1_000L
+        private const val RECONNECT_BASE_MS = 2_000L
+        private const val RECONNECT_MAX_MS = 15_000L
+
+        fun start(context: Context) {
+            if (
+                HeartRateSensorPreferences(context).selected() == null ||
+                !hasHeartRateBleRuntimePermissions(context)
+            ) {
+                HeartRateLiveState.disconnected()
+                return
+            }
+            ContextCompat.startForegroundService(
+                context,
+                Intent(context, HeartRateSensorService::class.java).setAction(ACTION_START),
+            )
+        }
+
+        fun stop(context: Context) {
+            context.startService(
+                Intent(context, HeartRateSensorService::class.java).setAction(ACTION_STOP),
+            )
+        }
+
+        fun forget(context: Context) {
+            HeartRateSensorPreferences(context).clear()
+            stop(context)
+            HeartRateLiveState.disconnected()
+        }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/MtpPublicationVisibility.kt

@@ -0,0 +1,40 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.media.MediaScannerConnection
+import java.io.File
+import java.util.concurrent.CountDownLatch
+import java.util.concurrent.TimeUnit
+
+/** Confirms that durable external-storage files have reached Android's MTP index. */
+internal fun interface MtpPublicationVisibility {
+    fun confirm(files: List<File>)
+}
+
+internal object ImmediateMtpPublicationVisibility : MtpPublicationVisibility {
+    override fun confirm(files: List<File>) = Unit
+}
+
+internal class AndroidMtpPublicationVisibility(context: Context) : MtpPublicationVisibility {
+    private val applicationContext = context.applicationContext
+
+    override fun confirm(files: List<File>) {
+        val paths = files.asSequence().filter(File::isFile).map { it.absolutePath }.distinct().toList()
+        if (paths.isEmpty()) return
+        val completed = CountDownLatch(paths.size)
+        /* WHY: direct File writes are durable before MediaProvider necessarily
+         * advertises them through Samsung's MTP database. CONTRACT: every
+         * immutable artifact is scanned before its mutable reference, and a
+         * publication is not reported complete until every callback arrives.
+         * INVARIANT: scanning changes transport visibility only; canonical
+         * names, bytes, generation identities and commit markers are intact. */
+        MediaScannerConnection.scanFile(
+            applicationContext,
+            paths.toTypedArray(),
+            Array(paths.size) { "application/json" },
+        ) { _, _ -> completed.countDown() }
+        if (!completed.await(15, TimeUnit.SECONDS)) {
+            throw SyncGenerationException("timeout confirming MTP publication visibility")
+        }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/SyncBackgroundActionability.kt

@@ -0,0 +1,44 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+
+internal enum class BackgroundRequestActionability {
+    NEW_REQUEST,
+    NEW_REMOTE_EVIDENCE,
+    ACTIVE_HANDOFF,
+    RESUMABLE_BUT_STALE,
+    NOT_ACTIONABLE,
+}
+
+internal data class BackgroundTerminalRun(
+    val runId: String,
+    val remoteEvidence: String,
+)
+
+/** One-entry durable suppression ledger for the current background request. */
+internal class BackgroundSyncRunLedger(context: Context) {
+    private val preferences =
+        context.applicationContext.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
+
+    fun terminal(): BackgroundTerminalRun? {
+        val runId = preferences.getString(RUN_ID, null) ?: return null
+        return BackgroundTerminalRun(runId, preferences.getString(REMOTE_EVIDENCE, "").orEmpty())
+    }
+
+    fun recordTerminal(runId: String, remoteEvidence: String) {
+        /* CONTRACT: only the request currently present on the transport needs
+         * suppression. A replacement request has a distinct run_id and is
+         * immediately actionable, so this ledger remains permanently bounded
+         * to one record and is not a second synchronization database. */
+        preferences.edit()
+            .putString(RUN_ID, runId)
+            .putString(REMOTE_EVIDENCE, remoteEvidence)
+            .apply()
+    }
+
+    companion object {
+        private const val PREFERENCES = "trainlog-background-sync-terminal"
+        private const val RUN_ID = "run_id"
+        private const val REMOTE_EVIDENCE = "remote_evidence"
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/SyncBackgroundService.kt

@@ -0,0 +1,197 @@
+package com.labfytools.trainlog.data
+
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.content.pm.ServiceInfo
+import android.os.Build
+import android.os.IBinder
+import androidx.core.app.NotificationCompat
+import androidx.core.content.ContextCompat
+import com.labfytools.trainlog.R
+import java.time.Duration
+import java.util.concurrent.Executors
+import java.util.concurrent.atomic.AtomicBoolean
+
+internal class BackgroundSyncSettings(context: Context) {
+    private val preferences = context.applicationContext.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
+
+    var enabled: Boolean
+        get() = preferences.getBoolean(ENABLED, false)
+        private set(value) { preferences.edit().putBoolean(ENABLED, value).apply() }
+
+    fun enable() { enabled = true }
+    fun disable() { enabled = false }
+
+    companion object {
+        private const val PREFERENCES = "trainlog-background-sync"
+        private const val ENABLED = "enabled"
+    }
+}
+
+/**
+ * User-enabled foreground listener for automatic Bluetooth and MTP synchronization.
+ *
+ * WHY: the phone must reconnect to the paired desktop while Compose is not
+ * visible, but modern Android does not permit an invisible permanent loop.
+ * CONTRACT: the service shows a mandatory notification, owns the RFCOMM client,
+ * invokes the same generation coordinator as SyncScreen, and never starts an
+ * exercise. MTP remains a filesystem fallback.
+ * INVARIANT: transport visibility only triggers protocol validation; stable
+ * run/generation/ACK identities remain the sole business authority.
+ */
+class SyncBackgroundService : Service() {
+    private val stopped = AtomicBoolean(false)
+    private val launched = AtomicBoolean(false)
+    private val executor = Executors.newFixedThreadPool(2)
+    private var repository: TrainlogRepository? = null
+    private var bluetoothClient: BluetoothSyncClient? = null
+
+    override fun onCreate() {
+        super.onCreate()
+        createChannel()
+        promoteForeground()
+        repository = TrainlogRepository(applicationContext)
+        bluetoothClient = BluetoothSyncClient(applicationContext, requireNotNull(repository))
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        if (intent?.action == ACTION_STOP || !BackgroundSyncSettings(this).enabled) {
+            stopSelf()
+            return START_NOT_STICKY
+        }
+        promoteForeground()
+        if (!launched.compareAndSet(false, true)) return START_NOT_STICKY
+        executor.execute {
+            bluetoothClient?.run(stopped)
+        }
+        executor.execute {
+            val coordinator = SyncGenerationCoordinator(
+                requireNotNull(repository),
+                AndroidMtpPublicationVisibility(applicationContext),
+            )
+            val terminalLedger = BackgroundSyncRunLedger(applicationContext)
+            while (!stopped.get() && BackgroundSyncSettings(this).enabled) {
+                val directory = canonicalExchangeDirectory()
+                /* WHY: waiting inside run() owns the process-wide conversation
+                 * lock and would starve Drive while USB is idle. CONTRACT: a
+                 * filesystem observation only schedules bounded validation;
+                 * the coordinator still validates all protocol evidence.
+                 * INVARIANT: no request means no business work and no lock. */
+                coordinator.publishPeer(directory)
+                val actionability =
+                    coordinator.classifyBackgroundRequest(directory, terminalLedger.terminal())
+                if (
+                    actionability == BackgroundRequestActionability.NEW_REQUEST ||
+                        actionability == BackgroundRequestActionability.NEW_REMOTE_EVIDENCE ||
+                        actionability == BackgroundRequestActionability.ACTIVE_HANDOFF
+                ) {
+                    when (
+                        val result = coordinator.run(
+                            directory,
+                            Duration.ofMinutes(5),
+                            intent = SyncConversationIntent.RESUME_BACKGROUND,
+                        )
+                    ) {
+                        is ForegroundGenerationResult.Completed ->
+                            terminalLedger.recordTerminal(
+                                result.runId,
+                                coordinator.remoteEvidence(directory, result.runId),
+                            )
+                        is ForegroundGenerationResult.Failed ->
+                            result.runId?.let {
+                                terminalLedger.recordTerminal(it, coordinator.remoteEvidence(directory, it))
+                            }
+                        is ForegroundGenerationResult.Superseded ->
+                            result.runId?.let {
+                                terminalLedger.recordTerminal(it, coordinator.remoteEvidence(directory, it))
+                            }
+                        ForegroundGenerationResult.Busy,
+                        is ForegroundGenerationResult.Cancelled -> Unit
+                    }
+                }
+                AiExportDriveSettings.enqueueImmediate(applicationContext)
+                if (!stopped.get()) runCatching { Thread.sleep(5_000) }
+            }
+            stopSelf()
+        }
+        return START_NOT_STICKY
+    }
+
+    override fun onDestroy() {
+        stopped.set(true)
+        bluetoothClient?.shutdown()
+        bluetoothClient = null
+        executor.shutdownNow()
+        repository?.close()
+        repository = null
+        super.onDestroy()
+    }
+
+    override fun onTimeout(startId: Int, fgsType: Int) {
+        /* Android 15 bounds dataSync foreground time across the application.
+         * Stop immediately rather than risking an ANR; durable generations
+         * and ACKs make a later explicit restart safe. */
+        stopped.set(true)
+        stopSelf(startId)
+    }
+
+    override fun onBind(intent: Intent?): IBinder? = null
+
+    private fun promoteForeground() {
+        val notification =
+            NotificationCompat.Builder(this, CHANNEL)
+                .setSmallIcon(R.mipmap.ic_launcher)
+                .setContentTitle(getString(R.string.background_sync_notification_title))
+                .setContentText(getString(R.string.background_sync_notification_text))
+                .setOngoing(true)
+                .setOnlyAlertOnce(true)
+                .build()
+        if (Build.VERSION.SDK_INT >= 29) {
+            val serviceType =
+                if (hasBluetoothConnectPermission(this)) {
+                    ServiceInfo.FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE
+                } else {
+                    ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC
+                }
+            startForeground(NOTIFICATION_ID, notification, serviceType)
+        } else {
+            startForeground(NOTIFICATION_ID, notification)
+        }
+    }
+
+    private fun createChannel() {
+        val manager = getSystemService(NotificationManager::class.java)
+        manager.createNotificationChannel(
+            NotificationChannel(
+                CHANNEL,
+                getString(R.string.background_sync_channel),
+                NotificationManager.IMPORTANCE_LOW,
+            ),
+        )
+    }
+
+    companion object {
+        private const val CHANNEL = "trainlog_sync"
+        private const val NOTIFICATION_ID = 1401
+        private const val ACTION_START = "com.labfytools.trainlog.sync.START"
+        private const val ACTION_STOP = "com.labfytools.trainlog.sync.STOP"
+
+        fun start(context: Context) {
+            BackgroundSyncSettings(context).enable()
+            ContextCompat.startForegroundService(
+                context,
+                Intent(context, SyncBackgroundService::class.java).setAction(ACTION_START),
+            )
+        }
+
+        fun stop(context: Context) {
+            BackgroundSyncSettings(context).disable()
+            context.startService(
+                Intent(context, SyncBackgroundService::class.java).setAction(ACTION_STOP),
+            )
+        }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/SyncConversationArbiter.kt

@@ -0,0 +1,116 @@
+package com.labfytools.trainlog.data
+
+import java.time.Duration
+import java.util.concurrent.locks.ReentrantLock
+import kotlin.concurrent.withLock
+
+internal enum class SyncConversationOwner {
+    FOREGROUND_EXPLICIT,
+    BACKGROUND_AUTOMATIC,
+}
+
+internal class SyncConversationYieldedException : Exception("conversation superseded by explicit sync")
+
+/** Process-wide ownership authority for Android generation conversations. */
+internal class SyncConversationArbiter {
+    private val lock = ReentrantLock()
+    private val ownershipChanged = lock.newCondition()
+    private var active: Lease? = null
+    private var pendingExplicit = 0
+
+    /**
+     * Announces user intent before the foreground service is refreshed.
+     *
+     * WHY: starting the service first allowed it to acquire the old binary
+     * lock and silently absorb the click. CONTRACT: an announcement prevents
+     * new background ownership and cooperatively supersedes an existing
+     * background lease. INVARIANT: ownership is still exclusive until that
+     * lease observes yield and releases in its finally block.
+     */
+    fun announceExplicit(): ExplicitClaim = lock.withLock {
+        pendingExplicit += 1
+        active?.takeIf { it.owner == SyncConversationOwner.BACKGROUND_AUTOMATIC }
+            ?.requestYield()
+        ownershipChanged.signalAll()
+        ExplicitClaim(this)
+    }
+
+    fun tryAcquireBackground(): Lease? = lock.withLock {
+        if (active != null || pendingExplicit > 0) return null
+        Lease(this, SyncConversationOwner.BACKGROUND_AUTOMATIC).also { active = it }
+    }
+
+    private fun acquireExplicit(claim: ExplicitClaim, timeout: Duration): Lease? {
+        return lock.withLock {
+            check(claim.announced)
+            var remaining = timeout.toNanos()
+            while (active != null) {
+                if (remaining <= 0L) {
+                    releaseAnnouncement(claim)
+                    return@withLock null
+                }
+                remaining = ownershipChanged.awaitNanos(remaining)
+            }
+            releaseAnnouncement(claim)
+            Lease(this, SyncConversationOwner.FOREGROUND_EXPLICIT).also { active = it }
+        }
+    }
+
+    private fun releaseAnnouncement(claim: ExplicitClaim) {
+        if (!claim.announced) return
+        claim.announced = false
+        pendingExplicit -= 1
+        check(pendingExplicit >= 0)
+        ownershipChanged.signalAll()
+    }
+
+    private fun release(lease: Lease) = lock.withLock {
+        if (active === lease) {
+            active = null
+            ownershipChanged.signalAll()
+        }
+    }
+
+    internal class ExplicitClaim internal constructor(private val arbiter: SyncConversationArbiter) :
+        AutoCloseable {
+        internal var announced = true
+        private var acquired = false
+
+        fun acquire(timeout: Duration): Lease? {
+            check(!acquired)
+            val lease = arbiter.acquireExplicit(this, timeout)
+            acquired = lease != null
+            return lease
+        }
+
+        override fun close() = arbiter.lock.withLock {
+            if (!acquired) arbiter.releaseAnnouncement(this)
+        }
+    }
+
+    internal class Lease internal constructor(
+        private val arbiter: SyncConversationArbiter,
+        val owner: SyncConversationOwner,
+    ) : AutoCloseable {
+        @Volatile private var yieldRequested = false
+        @Volatile private var closed = false
+
+        internal fun requestYield() {
+            yieldRequested = true
+        }
+
+        fun throwIfYieldRequested() {
+            if (yieldRequested) throw SyncConversationYieldedException()
+        }
+
+        override fun close() {
+            if (closed) return
+            closed = true
+            arbiter.release(this)
+        }
+    }
+
+    companion object {
+        val process = SyncConversationArbiter()
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/data/SyncGenerationForegroundCoordinator.kt

@@ -0,0 +1,701 @@
+package com.labfytools.trainlog.data
+
+import android.util.Log
+import java.io.File
+import java.io.FileOutputStream
+import java.nio.file.AtomicMoveNotSupportedException
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
+import java.time.Duration
+import java.util.UUID
+import org.json.JSONArray
+import org.json.JSONObject
+
+internal sealed interface ForegroundGenerationResult {
+    data class Completed(val runId: String) : ForegroundGenerationResult
+    data object Busy : ForegroundGenerationResult
+    data class Superseded(val runId: String?) : ForegroundGenerationResult
+    data class Cancelled(val runId: String?) : ForegroundGenerationResult
+    data class Failed(val message: String, val runId: String?) : ForegroundGenerationResult
+}
+
+internal enum class SyncConversationIntent {
+    NEW_EXPLICIT,
+    RESUME_BACKGROUND,
+}
+
+internal fun interface SyncGenerationTrace {
+    fun record(runId: String?, phase: String, artifact: String?, generationId: String?, result: String?)
+}
+
+internal object AndroidSyncGenerationTrace : SyncGenerationTrace {
+    override fun record(
+        runId: String?, phase: String, artifact: String?, generationId: String?, result: String?
+    ) {
+        Log.i(
+            "TrainlogSyncGeneration",
+            listOfNotNull(
+                "run_id=${runId ?: "pending"}",
+                "phase=$phase",
+                artifact?.let { "artifact=$it" },
+                generationId?.let { "generation_id=$it" },
+                result?.let { "result=$it" },
+            ).joinToString(" "),
+        )
+    }
+}
+
+internal fun acknowledgementMatchesCapturedGeneration(
+    acknowledgement: JSONObject,
+    captured: CapturedSyncGeneration,
+): Boolean =
+    acknowledgement.optString("generation_id") == captured.generationId &&
+        acknowledgement.optString("manifest_sha256") == captured.manifestSha256
+
+/** Owns the bounded, user-initiated Android side of a generation conversation. */
+internal class SyncGenerationCoordinator(
+    private val repository: TrainlogRepository,
+    private val visibility: MtpPublicationVisibility = ImmediateMtpPublicationVisibility,
+    private val trace: SyncGenerationTrace = AndroidSyncGenerationTrace,
+    private val arbiter: SyncConversationArbiter = SyncConversationArbiter.process,
+) {
+    private val service = SyncGenerationService(repository)
+
+    private companion object {
+        const val ACK_RECOVERY_CAPABILITY = "generation-ack-recovery-v1"
+        const val MAX_COORDINATION_BYTES = 65_536
+    }
+
+    private fun phase(
+        runId: String?,
+        phase: String,
+        artifact: String? = null,
+        generationId: String? = null,
+        result: String? = null,
+    ) = trace.record(runId, phase, artifact, generationId, result)
+
+    internal fun resumableGeneration(runId: String, consumerPeerId: String? = null): CapturedSyncGeneration? =
+        repository.inSyncGenerationTransaction { db ->
+            fun query(sql: String, arguments: Array<String>): CapturedSyncGeneration? = db.rawQuery(
+                sql,
+                arguments,
+            ).use { cursor ->
+                if (!cursor.moveToFirst()) null
+                else {
+                    val captured =
+                        CapturedSyncGeneration(
+                            cursor.getString(0),
+                            runId,
+                            cursor.getString(1),
+                            File(cursor.getString(2)),
+                        )
+                    if (cursor.moveToNext())
+                        throw SyncGenerationException("ambiguous resumable generation")
+                    captured
+                }
+            }
+            query(
+                "SELECT generation_id,manifest_sha256,staging_path FROM sync_generations " +
+                    "WHERE run_id=? AND (status IN('captured','published','waiting_acknowledgement') " +
+                    "OR (status='acknowledged' AND NOT EXISTS(" +
+                    "SELECT 1 FROM sync_consumed_generations c WHERE c.run_id=sync_generations.run_id " +
+                    "AND c.result IN('consumed','rejected')))) " +
+                    (if (consumerPeerId == null) "" else "AND consumer_peer_id=? ") +
+                    "LIMIT 2",
+                if (consumerPeerId == null) arrayOf(runId) else arrayOf(runId, consumerPeerId),
+            ) ?: if (consumerPeerId == null) null else query(
+                /* WHY: an RFCOMM reset creates a new conversation run while
+                 * the immutable generation still awaits its correlated ACK.
+                 * CONTRACT: resume only the unsuperseded generation for the
+                 * same peer; the reference adopts the new run while manifest
+                 * and generation identity remain unchanged. */
+                "SELECT g.generation_id,g.manifest_sha256,g.staging_path FROM sync_generations g " +
+                    "WHERE g.consumer_peer_id=? AND g.status IN('captured','published','waiting_acknowledgement') " +
+                    "AND NOT EXISTS(SELECT 1 FROM sync_generations sibling JOIN sync_acknowledgements a " +
+                    "ON a.generation_id=sibling.generation_id WHERE sibling.parent_generation_id=g.parent_generation_id " +
+                    "AND sibling.generation_id<>g.generation_id AND sibling.status='acknowledged') " +
+                    "ORDER BY g.generated_at DESC LIMIT 2",
+                arrayOf(consumerPeerId),
+            )
+        }
+
+    private fun request(directory: File): JSONObject? {
+        val path = File(directory, "request-v1.json")
+        if (!path.isFile || path.length() !in 1..64 * 1024) return null
+        val request = runCatching { JSONObject(path.readText()) }.getOrNull() ?: return null
+        val runId = request.optString("run_id")
+        val desktopPeerId = request.optString("desktop_peer_id")
+        if (
+            request.optString("format") != "trainlog-sync-generation-request" ||
+                request.optInt("version", -1) != 1 ||
+                !runId.matches(Regex("^sy_[0-9a-f-]{36}$")) ||
+                !desktopPeerId.matches(Regex("^peer_[0-9a-f-]{36}$")) ||
+                request.optString("android_peer_id") != service.peerId()
+        ) return null
+        return request
+    }
+
+    private fun hasGeneration(runId: String): Boolean =
+        repository.inSyncGenerationTransaction { db ->
+            db.rawQuery(
+                "SELECT 1 FROM sync_generations WHERE run_id=? LIMIT 1",
+                arrayOf(runId),
+            ).use { it.moveToFirst() }
+        }
+
+    internal fun remoteEvidence(directory: File, runId: String): String {
+        val evidence =
+            listOf(
+                    Triple("desktop-consumption-ack-v1.json", "trainlog-sync-ack", 1),
+                    Triple("desktop-generation-v1.json", "trainlog-sync-generation-reference", 1),
+                )
+                .mapNotNull { (name, format, version) ->
+                    val path = File(directory, name)
+                    if (!path.isFile || path.length() !in 1..64 * 1024) return@mapNotNull null
+                    val raw = runCatching { path.readBytes() }.getOrNull() ?: return@mapNotNull null
+                    val value = runCatching { JSONObject(raw.toString(Charsets.UTF_8)) }.getOrNull()
+                        ?: return@mapNotNull null
+                    if (
+                        value.optString("format") != format ||
+                            value.optInt("version", -1) != version ||
+                            value.optString("run_id") != runId
+                    ) return@mapNotNull null
+                    "$name:${java.security.MessageDigest.getInstance("SHA-256").digest(raw)
+                        .joinToString("") { "%02x".format(it) }}"
+                }
+        return evidence.sorted().joinToString("|")
+    }
+
+    internal fun classifyBackgroundRequest(
+        directory: File,
+        terminal: BackgroundTerminalRun?,
+    ): BackgroundRequestActionability {
+        val request = request(directory) ?: return BackgroundRequestActionability.NOT_ACTIONABLE
+        val runId = request.getString("run_id")
+        val desktopPeerId = request.getString("desktop_peer_id")
+        val resumable = resumableGeneration(runId, desktopPeerId) != null
+        if (terminal?.runId == runId) {
+            val currentEvidence = remoteEvidence(directory, runId)
+            return if (currentEvidence.isNotEmpty() && currentEvidence != terminal.remoteEvidence)
+                BackgroundRequestActionability.NEW_REMOTE_EVIDENCE
+            else if (resumable) BackgroundRequestActionability.RESUMABLE_BUT_STALE
+            else BackgroundRequestActionability.NOT_ACTIONABLE
+        }
+        if (!hasGeneration(runId)) return BackgroundRequestActionability.NEW_REQUEST
+        if (resumable) return BackgroundRequestActionability.ACTIVE_HANDOFF
+        return BackgroundRequestActionability.NOT_ACTIONABLE
+    }
+
+    internal fun currentRequestRunId(directory: File): String? =
+        request(directory)?.optString("run_id")
+
+    internal fun hasReplayableAcknowledgement(directory: File): Boolean {
+        val request =
+            runCatching { JSONObject(File(directory, "request-v1.json").readText()) }.getOrNull()
+                ?: return false
+        val reference =
+            runCatching { JSONObject(File(directory, "desktop-generation-v1.json").readText()) }
+                .getOrNull() ?: return false
+        val acknowledgement =
+            runCatching { JSONObject(File(directory, "android-consumption-ack-v1.json").readText()) }
+                .getOrNull() ?: return false
+        /* WHY: a network failure may occur after Core commits consumption but
+         * before Drive receives its ACK. CONTRACT: only the exact durable ACK
+         * correlated to the current request and desktop reference is replayed.
+         * INVARIANT: replay transports existing evidence and never recaptures
+         * a generation or repeats a domain mutation. */
+        return request.optString("format") == "trainlog-sync-generation-request" &&
+            request.optInt("version", -1) == 1 &&
+            request.optString("android_peer_id") == service.peerId() &&
+            reference.optString("format") == "trainlog-sync-generation-reference" &&
+            reference.optInt("version", -1) == 1 &&
+            acknowledgement.optString("format") == "trainlog-sync-ack" &&
+            acknowledgement.optInt("version", -1) == 1 &&
+            acknowledgement.optString("run_id") == request.optString("run_id") &&
+            reference.optString("run_id") == request.optString("run_id") &&
+            acknowledgement.optString("generation_id") == reference.optString("generation_id") &&
+            acknowledgement.optString("manifest_sha256") == reference.optString("manifest_sha256") &&
+            acknowledgement.optString("producer_peer_id") == request.optString("desktop_peer_id") &&
+            acknowledgement.optString("consumer_peer_id") == service.peerId() &&
+            acknowledgement.optString("result") in setOf("consumed", "rejected")
+    }
+
+    private fun requireExactKeys(value: JSONObject, expected: Set<String>, label: String) {
+        val actual = value.keys().asSequence().toSet()
+        if (actual != expected) throw SyncGenerationException("invalid $label fields")
+    }
+
+    private fun requestSupports(request: JSONObject, capability: String): Boolean {
+        val capabilities = request.optJSONArray("capabilities") ?: return false
+        for (index in 0 until capabilities.length()) {
+            if (capabilities.optString(index) == capability) return true
+        }
+        return false
+    }
+
+    private fun recoveryAcknowledgements(
+        desktopPeerId: String,
+        androidPeerId: String,
+    ): JSONArray =
+        repository.inSyncGenerationTransaction { db ->
+            val acknowledgements = JSONArray()
+            db.rawQuery(
+                    "SELECT ack_json FROM sync_consumed_generations WHERE producer_peer_id=? " +
+                        "AND consumer_peer_id=? AND result IN('consumed','rejected') " +
+                        "ORDER BY consumed_at DESC,generation_id DESC LIMIT 32",
+                    arrayOf(desktopPeerId, androidPeerId),
+                )
+                .use { cursor ->
+                    while (cursor.moveToNext()) {
+                        val acknowledgement = JSONObject(cursor.getString(0))
+                        /* ACKs written before cross-runtime rejection diagnostics
+                         * were normalized can hash '/' differently in Android
+                         * and Python JSON canonicalizers. They remain immutable
+                         * evidence, but must not block recovery of newer,
+                         * compatible ACKs. Consumed ACKs are unaffected. */
+                        if (
+                            acknowledgement.optString("result") != "rejected" ||
+                                !acknowledgement.optString("diagnostic").contains("/")
+                        ) {
+                            acknowledgements.put(acknowledgement)
+                        }
+                    }
+                }
+            acknowledgements
+        }
+
+    private fun reconcileArchiveAcknowledgements(
+        raw: ByteArray,
+        runId: String,
+        androidPeerId: String,
+        desktopPeerId: String,
+    ) {
+        /* WHY: releases before archive-v1 advanced generation status without
+         * retaining the consumer's ACK locally. The desktop consumer may
+         * return its exact durable ACK so the Android producer can repair
+         * that evidence gap without fabricating or weakening proof.
+         * CONTRACT: the envelope is strictly correlated and contains at most
+         * 32 ACKs; acceptAcknowledgement revalidates every ACK against the
+         * immutable local manifest before any archive can become eligible.
+         * INVARIANT: a missing, rejected, or ambiguous ACK leaves its
+         * generation active and protected. */
+        val envelope = JSONObject(raw.toString(Charsets.UTF_8))
+        requireExactKeys(
+            envelope,
+            setOf(
+                "format",
+                "version",
+                "run_id",
+                "android_peer_id",
+                "desktop_peer_id",
+                "acknowledgements",
+            ),
+            "archive acknowledgement envelope",
+        )
+        if (
+            envelope.getString("format") != "trainlog-sync-archive-acknowledgements" ||
+                envelope.getInt("version") != 1 ||
+                envelope.getString("run_id") != runId ||
+                envelope.getString("android_peer_id") != androidPeerId ||
+                envelope.getString("desktop_peer_id") != desktopPeerId
+        ) {
+            throw SyncGenerationException("archive acknowledgement envelope is not correlated")
+        }
+        val acknowledgements = envelope.getJSONArray("acknowledgements")
+        if (acknowledgements.length() > 32)
+            throw SyncGenerationException("too many archive acknowledgements")
+        for (index in 0 until acknowledgements.length()) {
+            service.acceptAcknowledgement(
+                acknowledgements.getJSONObject(index).toString().toByteArray(Charsets.UTF_8)
+            )
+        }
+    }
+
+    private fun publish(path: File, value: String) {
+        val temporary = File(path.parentFile, ".${path.name}.tmp-${UUID.randomUUID()}")
+        FileOutputStream(temporary).use { stream ->
+            stream.write(value.toByteArray())
+            stream.flush()
+            stream.fd.sync()
+        }
+        /* WHY: Drive conversations reuse coordination filenames, and
+         * File.renameTo() does not reliably replace an existing destination
+         * on Android private storage. CONTRACT: readers observe either the
+         * previous complete JSON document or its complete replacement.
+         * INVARIANT: the temporary file is in the destination directory, so
+         * the preferred move is same-filesystem and atomic when supported. */
+        try {
+            Files.move(
+                temporary.toPath(),
+                path.toPath(),
+                StandardCopyOption.ATOMIC_MOVE,
+                StandardCopyOption.REPLACE_EXISTING,
+            )
+        } catch (_: AtomicMoveNotSupportedException) {
+            Files.move(
+                temporary.toPath(),
+                path.toPath(),
+                StandardCopyOption.REPLACE_EXISTING,
+            )
+        } catch (_: Exception) {
+            temporary.delete()
+            throw SyncGenerationException("cannot publish ${path.name}")
+        }
+    }
+
+    /* WHY: transports must advertise a stable installation before a desktop
+     * can address its first request. CONTRACT: discovery publishes no domain
+     * facts and does not acquire the conversation lock. INVARIANT: run() uses
+     * this exact descriptor, so idle discovery cannot fork capabilities. */
+    internal fun publishPeer(directory: File): String {
+        if (!directory.isDirectory)
+            throw SyncGenerationException("exchange directory is unavailable")
+        val peer = service.peerId()
+        val path = File(directory, "android-peer-v1.json")
+        val descriptor =
+            JSONObject()
+                .put("format", "trainlog-sync-peer")
+                .put("version", 1)
+                .put("peer_id", peer)
+                .put(
+                    "capabilities",
+                    JSONArray(
+                        listOf(
+                            "generation-manifest-v1",
+                            "generation-ack-v1",
+                            "causal-delete-v1",
+                            "mobile-history-v4",
+                            "execution-draft-v1",
+                            "generation-archive-v1",
+                            ACK_RECOVERY_CAPABILITY,
+                            "session-preparations-v2",
+                            "programs-v1",
+                        )
+                    ),
+                )
+                .toString()
+        /* WHY: the foreground listener probes every five seconds, while some
+         * Android MediaProvider implementations cannot atomically replace an
+         * unchanged file that is simultaneously exposed over MTP. CONTRACT:
+         * an identical canonical descriptor is already a complete durable
+         * publication. INVARIANT: changed or unreadable bytes still use the
+         * crash-safe replacement path above. */
+        if (runCatching { path.isFile && path.readText() == descriptor }.getOrDefault(false)) {
+            visibility.confirm(listOf(path))
+            return peer
+        }
+        publish(path, descriptor)
+        visibility.confirm(listOf(path))
+        return peer
+    }
+
+    private fun await(path: File, deadline: Long, pump: (() -> Unit)? = null): File {
+        while (!path.isFile) {
+            if (System.nanoTime() >= deadline)
+                throw SyncGenerationException("timeout waiting for ${path.name}")
+            pump?.invoke()
+            Thread.sleep(50)
+        }
+        return path
+    }
+
+    private fun awaitCorrelated(
+        path: File,
+        deadline: Long,
+        predicate: (JSONObject) -> Boolean,
+        pump: (() -> Unit)? = null,
+        lease: SyncConversationArbiter.Lease,
+    ): ByteArray {
+        while (true) {
+            lease.throwIfYieldRequested()
+            if (path.isFile && path.length() <= 64 * 1024) {
+                try {
+                    val raw = path.readBytes()
+                    if (predicate(JSONObject(raw.toString(Charsets.UTF_8)))) return raw
+                } catch (_: Exception) {
+                    // Publication replaces the file atomically, but an old or
+                    // concurrently observed object is not evidence of failure.
+                }
+            }
+            if (System.nanoTime() >= deadline)
+                throw SyncGenerationException("timeout waiting for correlated ${path.name}")
+            pump?.invoke()
+            Thread.sleep(50)
+        }
+    }
+
+    fun run(
+        directory: File,
+        timeout: Duration = Duration.ofMinutes(5),
+        afterPeerPublication: (() -> Unit)? = null,
+        afterRecoveryAcknowledgements: (() -> Unit)? = null,
+        afterPublication: (() -> Unit)? = null,
+        pollTransport: (() -> Unit)? = null,
+        afterAcknowledgement: (() -> Unit)? = null,
+        intent: SyncConversationIntent = SyncConversationIntent.RESUME_BACKGROUND,
+        explicitClaim: SyncConversationArbiter.ExplicitClaim? = null,
+    ): ForegroundGenerationResult {
+        val claim =
+            if (intent == SyncConversationIntent.NEW_EXPLICIT)
+                explicitClaim ?: arbiter.announceExplicit()
+            else null
+        val lease = try {
+            claim?.acquire(timeout) ?: if (claim == null) arbiter.tryAcquireBackground() else null
+        } catch (_: InterruptedException) {
+            Thread.currentThread().interrupt()
+            claim?.close()
+            return ForegroundGenerationResult.Cancelled(null)
+        }
+        if (lease == null) {
+            claim?.close()
+            return ForegroundGenerationResult.Busy
+        }
+        var currentRunId: String? = null
+        return try {
+            val peer = publishPeer(directory)
+            phase(null, "peer_published", "android-peer-v1.json")
+            val baselineRunId = request(directory)?.optString("run_id")
+            /* WHY: trainlog-syncd is intentionally driven by the established
+             * Android request artifact, not by polling generation internals.
+             * CONTRACT: each explicit foreground attempt publishes the peer
+             * identity before its caller emits one fresh request signal.
+             * INVARIANT: a failed attempt's request, run, generations, and
+             * ACK evidence remain immutable; retry creates new correlation. */
+            afterPeerPublication?.let {
+                it.invoke()
+                phase(
+                    null,
+                    "full_generation_trigger_published",
+                    FULL_GENERATION_REQUEST_NAME,
+                )
+            }
+            val deadline = System.nanoTime() + timeout.toNanos()
+            val requestRaw =
+                awaitCorrelated(File(directory, "request-v1.json"), deadline, { candidate ->
+                    val runId = candidate.optString("run_id")
+                    runId.startsWith("sy_") && when (intent) {
+                        SyncConversationIntent.NEW_EXPLICIT -> runId != baselineRunId
+                        SyncConversationIntent.RESUME_BACKGROUND ->
+                            resumableGeneration(runId) != null || !hasGeneration(runId)
+                    }
+                }, pollTransport, lease)
+            val request = JSONObject(requestRaw.toString(Charsets.UTF_8))
+            val runId = request.getString("run_id")
+            currentRunId = runId
+            phase(runId, "generation_request_observed", "request-v1.json")
+            if (request.getString("android_peer_id") != peer)
+                throw SyncGenerationException("request targets another Android peer")
+            val archiveAckRaw =
+                awaitCorrelated(
+                    File(directory, "desktop-archive-acknowledgements-v1.json"),
+                    deadline,
+                    {
+                        it.optString("run_id") == request.getString("run_id") &&
+                            it.optString("android_peer_id") == peer
+                    },
+                    pollTransport,
+                    lease,
+                )
+            reconcileArchiveAcknowledgements(
+                archiveAckRaw,
+                request.getString("run_id"),
+                peer,
+                request.getString("desktop_peer_id"),
+            )
+            phase(runId, "archive_ack_observed", "desktop-archive-acknowledgements-v1.json")
+            if (requestSupports(request, ACK_RECOVERY_CAPABILITY)) {
+                /* WHY: Android may commit consumption after the desktop
+                 * producer has already published its immutable generation, then
+                 * transport can fail before the ACK reaches that producer.
+                 * CONTRACT: return only exact durable consumer ACK evidence,
+                 * bounded to the newest 32 rows, before either side captures a
+                 * new generation. INVARIANT: recovery never fabricates lineage
+                 * and never rewrites Android consumption history. */
+                val recoveryPath =
+                    File(directory, "android-archive-acknowledgements-v1.json")
+                val recoveryEnvelope =
+                    JSONObject()
+                        .put("format", "trainlog-sync-archive-acknowledgements")
+                        .put("version", 1)
+                        .put("run_id", runId)
+                        .put("android_peer_id", peer)
+                        .put("desktop_peer_id", request.getString("desktop_peer_id"))
+                        .put(
+                            "acknowledgements",
+                            recoveryAcknowledgements(
+                                request.getString("desktop_peer_id"),
+                                peer,
+                            ),
+                        )
+                        .toString()
+                if (recoveryEnvelope.toByteArray(Charsets.UTF_8).size > MAX_COORDINATION_BYTES)
+                    throw SyncGenerationException(
+                        "Android archive acknowledgement envelope exceeds bound"
+                    )
+                publish(recoveryPath, recoveryEnvelope)
+                visibility.confirm(listOf(recoveryPath))
+                afterRecoveryAcknowledgements?.invoke()
+                phase(
+                    runId,
+                    "android_archive_ack_published",
+                    recoveryPath.name,
+                )
+            }
+            /* WHY: transport can fail after immutable generation publication.
+             * CONTRACT: an explicit retry for the same run republishes that
+             * exact generation and resumes ACK handling; it never recaptures
+             * mutable application state under an existing identity.
+             * INVARIANT: a completed inbound ledger makes the run ineligible;
+             * an acknowledged outbound generation remains resumable only to
+             * finish its missing inbound half. */
+            phase(runId, "generation_capture_started")
+            lease.throwIfYieldRequested()
+            val captured =
+                resumableGeneration(
+                    request.getString("run_id"),
+                    request.getString("desktop_peer_id"),
+                ) ?: service.capture(
+                    directory,
+                    request.getString("desktop_peer_id"),
+                    request.getString("run_id"),
+                )
+            lease.throwIfYieldRequested()
+            phase(runId, "generation_captured", generationId = captured.generationId)
+            val published = service.publish(captured, File(directory, "android-objects"))
+            visibility.confirm(
+                published.walkTopDown().filter(File::isFile).sortedBy { it.name == "manifest.json" }.toList()
+            )
+            lease.throwIfYieldRequested()
+            phase(
+                runId,
+                "generation_objects_published",
+                published.relativeTo(directory).path,
+                captured.generationId,
+            )
+            val generationReference = File(directory, "android-generation-v1.json")
+            publish(
+                generationReference,
+                JSONObject()
+                    .put("format", "trainlog-sync-generation-reference")
+                    .put("version", 1)
+                    .put("run_id", captured.runId)
+                    .put("generation_id", captured.generationId)
+                    .put("manifest_sha256", captured.manifestSha256)
+                    .put("relative_path", published.relativeTo(directory).path)
+                    .toString(),
+            )
+            visibility.confirm(listOf(generationReference))
+            phase(
+                runId,
+                "generation_reference_published",
+                generationReference.name,
+                captured.generationId,
+            )
+            afterPublication?.invoke()
+            lease.throwIfYieldRequested()
+            // CONTRACT: durable objects from earlier conversations remain in
+            // the exchange directory. A cross-run retry preserves the
+            // immutable manifest's original run_id, so correlate its ACK by
+            // generation identity and manifest digest. acceptAcknowledgement
+            // then revalidates the complete durable ACK against SQLite.
+            // INVARIANT: unrelated or same-ID/different-bytes ACKs remain
+            // ignored; an exact replay is deliberately accepted.
+            val desktopAck =
+                awaitCorrelated(File(directory, "desktop-consumption-ack-v1.json"), deadline, {
+                    acknowledgementMatchesCapturedGeneration(it, captured)
+                }, pollTransport, lease)
+            service.acceptAcknowledgement(desktopAck)
+            phase(runId, "desktop_ack_observed", "desktop-consumption-ack-v1.json", captured.generationId)
+            val referenceRaw =
+                awaitCorrelated(File(directory, "desktop-generation-v1.json"), deadline, {
+                    it.optString("run_id") == captured.runId
+                }, pollTransport, lease)
+            val reference = JSONObject(referenceRaw.toString(Charsets.UTF_8))
+            phase(
+                runId,
+                "desktop_generation_observed",
+                "desktop-generation-v1.json",
+                reference.optString("generation_id"),
+            )
+            /* WHY: non-atomic transports can expose a newly downloaded
+             * reference locally before the corresponding immutable objects
+             * have reached this process. CONTRACT: correlation validates the
+             * reference first, then one transport refresh stages its committed
+             * generation before Core validates hashes and imports it.
+             * INVARIANT: the refresh moves bytes only; service.consume remains
+             * the sole validation and mutation authority. */
+            pollTransport?.invoke()
+            val acknowledgement =
+                service.consume(File(directory, reference.getString("relative_path")))
+            phase(
+                runId,
+                "desktop_generation_consumed",
+                generationId = reference.optString("generation_id"),
+            )
+            val acknowledgementPath = File(directory, "android-consumption-ack-v1.json")
+            publish(acknowledgementPath, acknowledgement)
+            visibility.confirm(listOf(acknowledgementPath))
+            phase(
+                runId,
+                "android_ack_published",
+                acknowledgementPath.name,
+                reference.optString("generation_id"),
+            )
+            afterAcknowledgement?.invoke()
+            phase(runId, "completed", result = "completed")
+            ForegroundGenerationResult.Completed(captured.runId)
+        } catch (_: SyncConversationYieldedException) {
+            phase(currentRunId, "superseded", result = "foreground_priority")
+            ForegroundGenerationResult.Superseded(currentRunId)
+        } catch (_: InterruptedException) {
+            Thread.currentThread().interrupt()
+            phase(currentRunId, "cancelled", result = "interrupted")
+            ForegroundGenerationResult.Cancelled(currentRunId)
+        } catch (error: Exception) {
+            Log.e(
+                "TrainlogSyncGeneration",
+                "run_id=${currentRunId ?: "pending"} phase=error " +
+                    "type=${error.javaClass.name} message=${error.message}",
+                error,
+            )
+            if (error.message == "generation retention capacity exhausted") {
+                try {
+                    val request = JSONObject(File(directory, "request-v1.json").readText())
+                    publish(
+                        File(directory, "android-generation-error-v1.json"),
+                        JSONObject()
+                            .put("format", "trainlog-sync-generation-error")
+                            .put("version", 1)
+                            .put("run_id", request.getString("run_id"))
+                            .put("android_peer_id", service.peerId())
+                            .put("code", "peer_capacity_exhausted")
+                            .put("action", "Archive acknowledged generations, then retry explicitly.")
+                            .toString(),
+                    )
+                    visibility.confirm(listOf(File(directory, "android-generation-error-v1.json")))
+                } catch (_: Exception) {
+                    // Preserve the original local failure when error reporting
+                    // cannot itself be durably published.
+                }
+            }
+            phase(
+                runCatching {
+                    JSONObject(File(directory, "request-v1.json").readText()).optString("run_id")
+                }.getOrNull(),
+                "error",
+                result = error.javaClass.simpleName,
+            )
+            ForegroundGenerationResult.Failed(
+                error.message ?: "generation synchronization failed",
+                currentRunId,
+            )
+        } finally {
+            lease.close()
+            claim?.close()
+        }
+    }
+}
+
+/* Compatibility name for focused tests and callers outside the coordinator
+ * migration. New triggers should depend on SyncGenerationCoordinator. */
+internal typealias SyncGenerationForegroundCoordinator = SyncGenerationCoordinator

android/app/src/main/java/com/labfytools/trainlog/data/SyncRequestOutbox.kt

@@ -13,7 +13,29 @@ import java.util.UUID
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 
+internal const val FULL_GENERATION_REQUEST_NAME =
+    "trainlog-sync-full-generation-request-v1.json"
+internal const val LEGACY_SYNC_REQUEST_NAME = "trainlog-sync-request-v1.json"
+
+internal data class SyncRequestIntent(
+    val requestId: String,
+    val requestedAt: String,
+) {
+    fun payload(): String =
+        JSONObject()
+            .put("format", "trainlog-sync-request")
+            .put("version", 1)
+            .put("request_id", requestId)
+            .put("requested_at", requestedAt)
+            .toString()
+}
+
 sealed interface SyncRequestResult {
+    /** The full-generation coordinator completed both durable peer ACKs. */
+    data class Completed(
+        val runId: String,
+    ) : SyncRequestResult
+
     data class Requested(
         val requestId: String,
     ) : SyncRequestResult
@@ -28,13 +50,16 @@ sealed interface SyncRequestResult {
 
 class SyncRequestOutbox private constructor(
     private val publisher: DirectExchangePublisher,
+    private val visibility: MtpPublicationVisibility,
 ) {
     constructor(context: Context) : this(
         DirectExchangePublisher { directExchangeDirectory(context) },
+        AndroidMtpPublicationVisibility(context),
     )
 
     internal constructor(directoryProvider: () -> DirectExchangeDirectoryAccess?) : this(
         DirectExchangePublisher(directoryProvider),
+        ImmediateMtpPublicationVisibility,
     )
 
     suspend fun requestSync(): SyncRequestResult = withContext(Dispatchers.IO) {
@@ -44,6 +69,16 @@ class SyncRequestOutbox private constructor(
         }
     }
 
+    internal fun requestFullGeneration(): SyncRequestResult {
+        return when (val opened = publisher.snapshot()) {
+            is DirectExchangeSnapshotResult.Ready -> {
+                val intent = newIntent()
+                publishFullGeneration(opened.snapshot, intent)
+            }
+            is DirectExchangeSnapshotResult.Error -> SyncRequestResult.Error(opened.message)
+        }
+    }
+
     internal fun requestSync(snapshot: DirectExchangeSnapshot): SyncRequestResult {
         if (
             Build.VERSION.SDK_INT <
@@ -52,37 +87,42 @@ class SyncRequestOutbox private constructor(
             return SyncRequestResult.Unsupported
         }
 
-        val requestId =
-            "sr_" +
-                UUID.randomUUID()
-                    .toString()
+        val intent = newIntent()
+        return publishLegacy(snapshot, intent)
+    }
 
-        val payload =
-            JSONObject()
-                .put(
-                    "format",
-                    "trainlog-sync-request",
-                )
-                .put(
-                    "version",
-                    1,
-                )
-                .put(
-                    "request_id",
-                    requestId,
-                )
-                .put(
-                    "requested_at",
-                    OffsetDateTime.now()
-                        .toString(),
-                )
-                .toString()
+    internal fun newIntent(): SyncRequestIntent =
+        SyncRequestIntent(
+            requestId = "sr_${UUID.randomUUID()}",
+            requestedAt = OffsetDateTime.now().toString(),
+        )
 
-        val displayName =
-            "trainlog-sync-request-v1.json"
-        val error = snapshot.writeJson(displayName, payload)
+    internal fun publishFullGeneration(
+        snapshot: DirectExchangeSnapshot,
+        intent: SyncRequestIntent,
+    ): SyncRequestResult = publish(snapshot, FULL_GENERATION_REQUEST_NAME, intent)
+
+    internal fun publishLegacy(
+        snapshot: DirectExchangeSnapshot,
+        intent: SyncRequestIntent,
+    ): SyncRequestResult = publish(snapshot, LEGACY_SYNC_REQUEST_NAME, intent)
+
+    private fun publish(
+        snapshot: DirectExchangeSnapshot,
+        displayName: String,
+        intent: SyncRequestIntent,
+    ): SyncRequestResult {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+            return SyncRequestResult.Unsupported
+        }
+        val error = snapshot.writeJson(displayName, intent.payload())
         return if (error == null) {
-            SyncRequestResult.Requested(requestId)
+            try {
+                visibility.confirm(listOf(java.io.File(canonicalExchangeDirectory(), displayName)))
+                SyncRequestResult.Requested(intent.requestId)
+            } catch (error: Exception) {
+                SyncRequestResult.Error(error.message ?: "Publication MTP impossible.")
+            }
         } else {
             SyncRequestResult.Error(error)
         }

android/app/src/main/java/com/labfytools/trainlog/model/CardioCalibrationModels.kt

@@ -0,0 +1,37 @@
+package com.labfytools.trainlog.model
+
+enum class CardioCalibrationPhase(val wireValue: String) {
+    WARMUP("warmup"),
+    PROGRESSIVE("progressive"),
+    HIGH_EFFORT("high_effort"),
+    RECOVERY("recovery"),
+    COMPLETED("completed"),
+    ABORTED("aborted");
+
+    companion object {
+        fun fromWire(value: String): CardioCalibrationPhase =
+            entries.firstOrNull { it.wireValue == value }
+                ?: error("Unknown cardio calibration phase: $value")
+    }
+}
+
+data class CardioCalibrationRecoveryPoint(
+    val targetOffsetSeconds: Int,
+    val observedAt: String,
+    val bpm: Int,
+)
+
+data class CardioCalibrationProfile(
+    val calibrationId: String,
+    val protocolVersion: Int,
+    val sessionId: String,
+    val entryId: String,
+    val phase: CardioCalibrationPhase,
+    val startedAt: String,
+    val phaseStartedAt: String,
+    val effortEndAt: String?,
+    val endedAt: String?,
+    val heartRateCaptureId: String?,
+    val observedPeakBpm: Int?,
+    val recovery: List<CardioCalibrationRecoveryPoint>,
+)

android/app/src/main/java/com/labfytools/trainlog/model/CardioGuidanceModels.kt

@@ -0,0 +1,98 @@
+package com.labfytools.trainlog.model
+
+enum class CardioPhaseKind(val wireValue: String) {
+    WARMUP("warmup"),
+    WORK("work"),
+    RECOVERY("recovery"),
+    COOLDOWN("cooldown"),
+}
+
+sealed interface CardioTargetDefinition {
+    data class AbsoluteBpm(
+        val minimumBpm: Int,
+        val maximumBpm: Int,
+    ) : CardioTargetDefinition
+
+    data class CalibrationPercent(
+        val calibrationId: String,
+        val observedPeakBpm: Int,
+        val minimumPercent: Int,
+        val maximumPercent: Int,
+    ) : CardioTargetDefinition
+}
+
+/**
+ * Immutable target actually used by one phase.
+ *
+ * The calibration identity and percentages are provenance only. Runtime
+ * guidance consumes the resolved BPM bounds so later calibration changes
+ * cannot rewrite an already-started session.
+ */
+data class CardioTargetSnapshot(
+    val minimumBpm: Int,
+    val maximumBpm: Int,
+    val calibrationId: String? = null,
+    val calibrationObservedPeakBpm: Int? = null,
+    val minimumPercent: Int? = null,
+    val maximumPercent: Int? = null,
+)
+
+sealed interface CardioPhaseExitCondition {
+    data class FixedDuration(val seconds: Int) : CardioPhaseExitCondition
+    data object EnterTarget : CardioPhaseExitCondition
+    data class RecoverBelow(val bpm: Int) : CardioPhaseExitCondition
+
+    data class DurationOrRecoverBelow(
+        val maximumSeconds: Int,
+        val bpm: Int,
+    ) : CardioPhaseExitCondition
+}
+
+data class CardioGuidedPhase(
+    val phaseId: String,
+    val kind: CardioPhaseKind,
+    val target: CardioTargetSnapshot?,
+    val exitCondition: CardioPhaseExitCondition,
+)
+
+enum class CardioGuidanceInstruction {
+    ACCELERATE,
+    MAINTAIN,
+    SLOW_DOWN,
+    SUSPENDED,
+}
+
+data class CardioGuidanceOutput(
+    val instruction: CardioGuidanceInstruction,
+    val bpm: Int?,
+    val target: CardioTargetSnapshot?,
+    val pendingInstruction: CardioGuidanceInstruction? = null,
+)
+
+data class CardioGuidancePhaseRecord(
+    val runId: String,
+    val sessionId: String,
+    val entryId: String,
+    val phase: CardioGuidedPhase,
+    val position: Int,
+    val startedAt: String,
+    val endedAt: String?,
+    val currentInstruction: CardioGuidanceInstruction,
+)
+
+data class CardioGuidanceEvent(
+    val sequence: Long,
+    val observedAt: String,
+    val instruction: CardioGuidanceInstruction,
+    val bpm: Int?,
+    val targetMinimumBpm: Int?,
+    val targetMaximumBpm: Int?,
+)
+
+data class CardioGuidanceRun(
+    val runId: String,
+    val sessionId: String,
+    val startedAt: String,
+    val endedAt: String?,
+    val phases: List<CardioGuidancePhaseRecord>,
+)

android/app/src/main/java/com/labfytools/trainlog/model/HeartRateModels.kt

@@ -0,0 +1,46 @@
+/*
+ * Android HeartRateModels model.
+ *
+ * Android owns sensor acquisition. Desktop/Web only consume synchronized
+ * measured facts and never connect to the heart-rate sensor.
+ */
+package com.labfytools.trainlog.model
+
+enum class HeartRateContextKind(val wireValue: String) {
+    SESSION("session"),
+    CARDIO("cardio"),
+    SLEEP("sleep");
+
+    companion object {
+        fun fromWire(value: String): HeartRateContextKind =
+            entries.firstOrNull { it.wireValue == value }
+                ?: error("Unknown heart-rate context: $value")
+    }
+}
+
+data class HeartRateRrInterval(
+    val index: Int,
+    /** Raw Bluetooth Heart Rate Service unit: 1/1024 second. */
+    val value1024: Int,
+)
+
+data class HeartRateSample(
+    val sequence: Long,
+    val observedAt: String,
+    val bpm: Int,
+    val exerciseEntryId: String? = null,
+    val sensorContactDetected: Boolean? = null,
+    val energyExpended: Int? = null,
+    val rrIntervals: List<HeartRateRrInterval> = emptyList(),
+)
+
+data class HeartRateCapture(
+    val captureId: String,
+    val contextKind: HeartRateContextKind,
+    val contextId: String,
+    val startedAt: String,
+    val endedAt: String?,
+    val activeExerciseEntryId: String?,
+    val sensorName: String?,
+    val samples: List<HeartRateSample> = emptyList(),
+)

android/app/src/main/java/com/labfytools/trainlog/model/ProgramModels.kt

@@ -0,0 +1,52 @@
+package com.labfytools.trainlog.model
+
+/** Read-only desktop-owned program projection exposed to Android presentation. */
+data class SyncedProgramSummary(
+    val programId: String,
+    val title: String,
+    val state: String,
+    val startDate: String?,
+    val endDate: String?,
+    val sessionCount: Int,
+)
+
+data class SyncedProgramDetail(
+    val programId: String,
+    val title: String,
+    val note: String?,
+    val state: String,
+    val startDate: String?,
+    val endDate: String?,
+    val sessions: List<SyncedProgramSession>,
+)
+
+data class SyncedProgramSession(
+    val programSessionId: String,
+    val title: String,
+    val sessionType: String,
+    val plannedFor: String?,
+    val note: String?,
+    val executionState: ProgramSessionExecutionState,
+    val executionSessionId: String?,
+    val occurrences: List<SyncedProgramOccurrence>,
+)
+
+enum class ProgramSessionExecutionState {
+    TODO,
+    IN_PROGRESS,
+    COMPLETED,
+}
+
+data class SyncedProgramOccurrence(
+    val entryId: String,
+    val exerciseId: String,
+    val exerciseName: String,
+    val equipmentId: String?,
+    val loadMode: String,
+    val restSeconds: Int,
+    val targetSets: Int?,
+    val targetReps: Int?,
+    val targetDurationSeconds: Int?,
+    val targetWeightKg: Double?,
+    val notes: String?,
+)

android/app/src/main/java/com/labfytools/trainlog/model/SessionModels.kt

@@ -9,17 +9,14 @@ enum class SessionType(
     val wireValue: String,
 ) {
     TRAINING("training"),
-    MAX_TEST("max_test");
+    MAX_TEST("max_test"),
+    CARDIO("cardio");
 
     companion object {
         fun fromWire(
             value: String,
         ): SessionType =
-            if (value == "max_test") {
-                MAX_TEST
-            } else {
-                TRAINING
-            }
+            entries.firstOrNull { it.wireValue == value } ?: TRAINING
     }
 }
 
@@ -79,6 +76,24 @@ data class SessionDraft(
     val sessionType: SessionType = SessionType.TRAINING,
 )
 
+data class SessionExerciseTiming(
+    val sessionId: String,
+    val entryId: String,
+    val exerciseId: String,
+    val startedAt: String,
+    val endedAt: String?,
+) {
+    val active: Boolean get() = endedAt == null
+}
+
+data class ActiveSessionTimelineContext(
+    val sessionId: String,
+    val startedAt: String,
+    val sessionType: SessionType,
+    val activeEntryId: String?,
+)
+
+
 data class SessionDraftForm(
     val selectedExercise: ExerciseProfile? = null,
     /** Null means creation; otherwise replace this durable draft entry. */
@@ -101,10 +116,20 @@ data class SessionDraftForm(
  * mistake unfinished capture for a completed session.
  */
 data class ActiveSessionDraft(
+    /** Stable lifecycle identity, allocated once when first persisted. */
+    val sessionId: String? = null,
+    /** Causal draft revision; local UI-only persistence may retain its tip. */
+    val revisionId: String = "dr_legacy_v1",
+    val parentRevisionId: String? = null,
+    /** Genuine lifecycle start, distinct from local form update time. */
+    val startedAt: String? = null,
     val exercises: List<SessionExerciseDraft> = emptyList(),
     val sessionType: SessionType = SessionType.TRAINING,
     /** Existing max_test session updated atomically on finalization, if any. */
     val sourceSessionId: String? = null,
+    /** Stable desktop-owned Program provenance; both values are present or absent. */
+    val sourceProgramId: String? = null,
+    val sourceProgramSessionId: String? = null,
     val form: SessionDraftForm = SessionDraftForm(),
     val updatedAt: String = "",
 )
@@ -123,6 +148,18 @@ data class AiSessionDraft(
     val entries: List<SessionExerciseDraft>,
 )
 
+/** Immutable desktop preparation delivery waiting for an explicit start. */
+data class PreparedSession(
+    val deliveryId: String,
+    val preparationId: String,
+    val revisionId: String,
+    val executionSessionId: String,
+    val plannedFor: String?,
+    val title: String,
+    val notes: String?,
+    val entries: List<SessionExerciseDraft>,
+)
+
 data class SessionSummary(
     val sessionId: String,
     val startedAt: String,

android/app/src/main/java/com/labfytools/trainlog/model/SleepDiaryModels.kt

@@ -0,0 +1,34 @@
+package com.labfytools.trainlog.model
+
+enum class SleepQuality(val wireValue: String) { TB("TB"), B("B"), MOY("Moy"), M("M"), TM("TM") }
+enum class SleepEventType(val wireValue: String) {
+    BED_TIME("bed_time"), FINAL_GET_UP("final_get_up"), NIGHT_GET_UP("night_get_up"),
+    SLEEP("sleep"), NAP("nap"), LONG_AWAKE("long_awake"), HALF_SLEEP("half_sleep"),
+    DAYTIME_SLEEPINESS("daytime_sleepiness"),
+}
+enum class SleepPublicationStatus { DRAFT, READY, SYNCHRONIZED, MODIFIED }
+data class SleepDiaryEvent(val eventId: String, val type: SleepEventType, val startAt: String, val endAt: String?)
+data class SleepMedication(
+    val medicationId: String, val revisionId: String, val createdAt: String, val updatedAt: String,
+    val name: String, val defaultDoseValue: Double?, val defaultDoseUnit: String?,
+    val form: String, val note: String, val active: Boolean,
+)
+data class MedicationIntake(
+    val intakeId: String, val medicationId: String, val medicationName: String,
+    val takenAt: String, val doseValue: Double?, val doseUnit: String?, val note: String,
+    val createdAt: String, val quantity: Int = 1,
+)
+data class SleepDiaryEntry(
+    val entryId: String, val nightStartDate: String, val nightEndDate: String,
+    val createdAt: String, val updatedAt: String, val revisionId: String,
+    val sleepQuality: SleepQuality?, val wakeQuality: SleepQuality?, val dayForm: SleepQuality?,
+    val treatmentAndNotes: String, val events: List<SleepDiaryEvent>, val intakes: List<MedicationIntake>,
+    val publicationStatus: SleepPublicationStatus,
+)
+data class SleepDiaryDraft(
+    val entryId: String? = null, val expectedRevision: String? = null,
+    val nightStartDate: String, val nightEndDate: String, val createdAt: String,
+    val updatedAt: String, val sleepQuality: SleepQuality?, val wakeQuality: SleepQuality?,
+    val dayForm: SleepQuality?, val treatmentAndNotes: String, val events: List<SleepDiaryEvent>,
+    val intakes: List<MedicationIntake> = emptyList(),
+)

android/app/src/main/java/com/labfytools/trainlog/ui/AndroidAppShell.kt

@@ -19,6 +19,7 @@ import androidx.compose.material3.IconButton
 import androidx.compose.material3.ModalDrawerSheet
 import androidx.compose.material3.ModalNavigationDrawer
 import androidx.compose.material3.NavigationDrawerItem
+import androidx.compose.material3.NavigationDrawerItemDefaults
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
@@ -32,6 +33,7 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.semantics.contentDescription
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.unit.dp
+import androidx.compose.foundation.shape.RoundedCornerShape
 import com.labfytools.trainlog.R
 import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
 import kotlinx.coroutines.launch
@@ -41,7 +43,7 @@ private val drawerIcons = mapOf(
     AppSection.SESSIONS to R.drawable.ic_sessions,
     AppSection.EXERCISES to R.drawable.ic_exercises,
     AppSection.EQUIPMENT to R.drawable.ic_equipment,
-    AppSection.STATISTICS to R.drawable.ic_statistics,
+    AppSection.SLEEP to R.drawable.ic_statistics,
     AppSection.SYNC to R.drawable.ic_sync,
     AppSection.SETTINGS to R.drawable.ic_settings,
 )
@@ -59,20 +61,24 @@ fun AndroidAppShell(
     fun sectionLabel(section: AppSection): String = strings.getString(when (section) {
         AppSection.HOME -> R.string.nav_home; AppSection.SESSIONS -> R.string.nav_sessions
         AppSection.EXERCISES -> R.string.nav_exercises; AppSection.EQUIPMENT -> R.string.nav_equipment
-        AppSection.STATISTICS -> R.string.nav_statistics; AppSection.SYNC -> R.string.nav_sync
-        AppSection.SETTINGS -> R.string.nav_settings
+        AppSection.SLEEP -> R.string.nav_sleep
+        AppSection.SYNC -> R.string.nav_sync; AppSection.SETTINGS -> R.string.nav_settings
     })
     fun title(): String = strings.getString(when (route) {
         AppRoute.Home -> R.string.nav_home; AppRoute.Sessions -> R.string.nav_sessions
         AppRoute.SessionEditor -> R.string.route_session_editor; AppRoute.SessionGenerator -> R.string.route_session_generator
         AppRoute.AiSessionDrafts -> R.string.route_ai_drafts; AppRoute.CompletedSessions -> R.string.route_completed_sessions
+        AppRoute.Programs -> R.string.route_programs; is AppRoute.ProgramDetail -> R.string.route_program_detail
+        AppRoute.CardioCalibration -> R.string.route_cardio_calibration
         is AppRoute.SessionDetail -> R.string.route_session_detail; is AppRoute.SessionCorrection -> R.string.route_session_correction
         AppRoute.Exercises -> R.string.nav_exercises; is AppRoute.ExerciseDetail -> R.string.route_exercise_detail
         is AppRoute.ExerciseEdit -> R.string.route_exercise_edit; is AppRoute.ExerciseCreate -> R.string.route_exercise_create
         AppRoute.Equipment -> R.string.nav_equipment; is AppRoute.EquipmentDetail -> R.string.route_equipment_detail
-        is AppRoute.EquipmentCreate -> R.string.route_equipment_create; AppRoute.Statistics -> R.string.nav_statistics
+        is AppRoute.EquipmentCreate -> R.string.route_equipment_create
         AppRoute.BodyMeasurements -> R.string.route_body_measurements; AppRoute.LatestMaxima -> R.string.route_latest_maxima
+        AppRoute.SleepDiary -> R.string.nav_sleep
         AppRoute.Sync -> R.string.nav_sync; AppRoute.Settings -> R.string.nav_settings
+        AppRoute.HeartRateDiagnostics -> R.string.route_heart_rate_diagnostics
     })
     val drawerState = rememberDrawerState(DrawerValue.Closed)
     val scope = rememberCoroutineScope()
@@ -106,7 +112,16 @@ fun AndroidAppShell(
                             onOpenSection(section)
                             scope.launch { drawerState.close() }
                         },
-                        modifier = Modifier.padding(horizontal = 12.dp),
+                        modifier = Modifier.padding(horizontal = 12.dp, vertical = 2.dp),
+                        shape = RoundedCornerShape(10.dp),
+                        colors = NavigationDrawerItemDefaults.colors(
+                            selectedContainerColor = colors.surfaceAlt,
+                            selectedIconColor = colors.accent,
+                            selectedTextColor = colors.text,
+                            unselectedContainerColor = colors.mantle,
+                            unselectedIconColor = colors.muted,
+                            unselectedTextColor = colors.muted,
+                        ),
                     )
                 }
             }
@@ -132,6 +147,7 @@ fun AndroidAppShell(
                         }
                     },
                     actions = {
+                        HeartRateIndicator()
                         if (!root) {
                             IconButton(
                                 onClick = { scope.launch { drawerState.open() } },

android/app/src/main/java/com/labfytools/trainlog/ui/AppNavigation.kt

@@ -12,7 +12,7 @@ import androidx.lifecycle.ViewModel
 
 enum class AppSection {
     HOME, SESSIONS, EXERCISES,
-    EQUIPMENT, STATISTICS, SYNC, SETTINGS,
+    EQUIPMENT, SLEEP, SYNC, SETTINGS,
 }
 
 sealed interface AppRoute {
@@ -23,6 +23,9 @@ sealed interface AppRoute {
     data object SessionGenerator : AppRoute { override val section = AppSection.SESSIONS }
     data object AiSessionDrafts : AppRoute { override val section = AppSection.SESSIONS }
     data object CompletedSessions : AppRoute { override val section = AppSection.SESSIONS }
+    data object Programs : AppRoute { override val section = AppSection.SESSIONS }
+    data object CardioCalibration : AppRoute { override val section = AppSection.SESSIONS }
+    data class ProgramDetail(val programId: String) : AppRoute { override val section = AppSection.SESSIONS }
     data class SessionDetail(val sessionId: String) : AppRoute { override val section = AppSection.SESSIONS }
     data class SessionCorrection(val sessionId: String) : AppRoute { override val section = AppSection.SESSIONS }
     data object Exercises : AppRoute { override val section = AppSection.EXERCISES }
@@ -32,11 +35,12 @@ sealed interface AppRoute {
     data object Equipment : AppRoute { override val section = AppSection.EQUIPMENT }
     data class EquipmentDetail(val equipmentId: String) : AppRoute { override val section = AppSection.EQUIPMENT }
     data class EquipmentCreate(val caller: AppRoute) : AppRoute { override val section = caller.section }
-    data object Statistics : AppRoute { override val section = AppSection.STATISTICS }
-    data object BodyMeasurements : AppRoute { override val section = AppSection.STATISTICS }
-    data object LatestMaxima : AppRoute { override val section = AppSection.STATISTICS }
+    data object BodyMeasurements : AppRoute { override val section = AppSection.HOME }
+    data object SleepDiary : AppRoute { override val section = AppSection.SLEEP }
+    data object LatestMaxima : AppRoute { override val section = AppSection.EXERCISES }
     data object Sync : AppRoute { override val section = AppSection.SYNC }
     data object Settings : AppRoute { override val section = AppSection.SETTINGS }
+    data object HeartRateDiagnostics : AppRoute { override val section = AppSection.SETTINGS }
 }
 
 fun AppSection.rootRoute(): AppRoute = when (this) {
@@ -44,7 +48,7 @@ fun AppSection.rootRoute(): AppRoute = when (this) {
     AppSection.SESSIONS -> AppRoute.Sessions
     AppSection.EXERCISES -> AppRoute.Exercises
     AppSection.EQUIPMENT -> AppRoute.Equipment
-    AppSection.STATISTICS -> AppRoute.Statistics
+    AppSection.SLEEP -> AppRoute.SleepDiary
     AppSection.SYNC -> AppRoute.Sync
     AppSection.SETTINGS -> AppRoute.Settings
 }
@@ -169,5 +173,11 @@ class TrainlogAppState : ViewModel() {
     val equipment = EquipmentScreenState()
     val exercise = ExerciseScreenState()
     val body = BodyScreenState()
+    /* WHY: the durable form intentionally does not serialize transient edit
+     * position, but a catalogue detour must still return to the same row.
+     * CONTRACT: this stable occurrence ID spans only that caller-aware detour;
+     * all actual form fields remain repository-owned and durable.
+     * INVARIANT: null means a new occurrence, never an inferred row. */
+    var pendingSessionEquipmentEntryId: String? = null
     val navigationController = AppNavigationController(navigation, generator, equipment, exercise, body)
 }

android/app/src/main/java/com/labfytools/trainlog/ui/BodyScreen.kt

@@ -8,6 +8,13 @@ package com.labfytools.trainlog.ui
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableIntStateOf
@@ -89,148 +96,74 @@ fun BodyScreen(
         TrainlogFrame(
             title = strings.getString(R.string.general)
         ) {
-            BodyMetricField(
-                label = strings.getString(R.string.weight),
-                unit = "kg",
-                value = bodyWeight,
-                onValueChange = {
-                    bodyWeight = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.neck),
-                unit = "cm",
-                value = neck,
-                onValueChange = {
-                    neck = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.shoulders),
-                unit = "cm",
-                value = shoulders,
-                onValueChange = {
-                    shoulders = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.chest),
-                unit = "cm",
-                value = chest,
-                onValueChange = {
-                    chest = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.waist),
-                unit = "cm",
-                value = waist,
-                onValueChange = {
-                    waist = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.hips),
-                unit = "cm",
-                value = hips,
-                onValueChange = {
-                    hips = it
-                    message = null
-                },
+            BodyMetricGrid(
+                listOf(
+                    BodyMetricItem(strings.getString(R.string.weight), "kg", bodyWeight) {
+                        bodyWeight = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.neck), "cm", neck) {
+                        neck = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.shoulders), "cm", shoulders) {
+                        shoulders = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.chest), "cm", chest) {
+                        chest = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.waist), "cm", waist) {
+                        waist = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.hips), "cm", hips) {
+                        hips = it
+                        message = null
+                    },
+                ),
             )
         }
 
         TrainlogFrame(
             title = strings.getString(R.string.limbs)
         ) {
-            BodyMetricField(
-                label = strings.getString(R.string.left_arm),
-                unit = "cm",
-                value = leftArm,
-                onValueChange = {
-                    leftArm = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.right_arm),
-                unit = "cm",
-                value = rightArm,
-                onValueChange = {
-                    rightArm = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.left_forearm),
-                unit = "cm",
-                value = leftForearm,
-                onValueChange = {
-                    leftForearm = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.right_forearm),
-                unit = "cm",
-                value = rightForearm,
-                onValueChange = {
-                    rightForearm = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.left_thigh),
-                unit = "cm",
-                value = leftThigh,
-                onValueChange = {
-                    leftThigh = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.right_thigh),
-                unit = "cm",
-                value = rightThigh,
-                onValueChange = {
-                    rightThigh = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.left_calf),
-                unit = "cm",
-                value = leftCalf,
-                onValueChange = {
-                    leftCalf = it
-                    message = null
-                },
-            )
-
-            BodyMetricField(
-                label = strings.getString(R.string.right_calf),
-                unit = "cm",
-                value = rightCalf,
-                onValueChange = {
-                    rightCalf = it
-                    message = null
-                },
+            BodyMetricGrid(
+                listOf(
+                    BodyMetricItem(strings.getString(R.string.left_arm), "cm", leftArm) {
+                        leftArm = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.right_arm), "cm", rightArm) {
+                        rightArm = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.left_forearm), "cm", leftForearm) {
+                        leftForearm = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.right_forearm), "cm", rightForearm) {
+                        rightForearm = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.left_thigh), "cm", leftThigh) {
+                        leftThigh = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.right_thigh), "cm", rightThigh) {
+                        rightThigh = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.left_calf), "cm", leftCalf) {
+                        leftCalf = it
+                        message = null
+                    },
+                    BodyMetricItem(strings.getString(R.string.right_calf), "cm", rightCalf) {
+                        rightCalf = it
+                        message = null
+                    },
+                ),
             )
         }
 
@@ -426,12 +359,14 @@ private fun BodyMetricField(
     unit: String,
     value: String,
     onValueChange: (String) -> Unit,
+    modifier: Modifier = Modifier,
 ) {
     TrainlogInputField(
-        label = "$label ($unit)",
+        label = label,
         value = value,
         onValueChange =
             onValueChange,
+        modifier = modifier,
         keyboardOptions =
             KeyboardOptions(
                 keyboardType =
@@ -439,9 +374,51 @@ private fun BodyMetricField(
                 imeAction =
                     ImeAction.Next,
             ),
+        suffix = unit,
+        compact = true,
     )
 }
 
+internal data class BodyMetricItem(
+    val label: String,
+    val unit: String,
+    val value: String,
+    val onValueChange: (String) -> Unit,
+)
+
+/** Two columns retain scanability; very narrow accessibility layouts stack. */
+internal fun bodyMetricColumnCount(availableWidthDp: Float, fontScale: Float): Int {
+    val twoCompactFieldsDp = 2 * 140f + 10f
+    return if (availableWidthDp >= twoCompactFieldsDp && fontScale < 1.5f) 2 else 1
+}
+
+@Composable
+internal fun ColumnScope.BodyMetricGrid(items: List<BodyMetricItem>) {
+    BoxWithConstraints(Modifier.fillMaxWidth()) {
+        /* WHY: this 360 dp device has 312 dp after screen padding; the old
+         * 330 dp threshold therefore stacked fields that need only 140 dp.
+         * CONTRACT: two compact fields plus their 10 dp gutter are preferred
+         * unless width or accessibility font scaling makes them unreadable. */
+        val columns = bodyMetricColumnCount(maxWidth.value, LocalDensity.current.fontScale)
+        Column(verticalArrangement = Arrangement.spacedBy(0.dp)) {
+            items.chunked(columns).forEach { rowItems ->
+                Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(10.dp)) {
+                    rowItems.forEach { item ->
+                        BodyMetricField(
+                            item.label,
+                            item.unit,
+                            item.value,
+                            item.onValueChange,
+                            Modifier.weight(1f),
+                        )
+                    }
+                    repeat(columns - rowItems.size) { androidx.compose.foundation.layout.Spacer(Modifier.weight(1f)) }
+                }
+            }
+        }
+    }
+}
+
 private sealed interface MetricParse {
     data object Empty :
         MetricParse

android/app/src/main/java/com/labfytools/trainlog/ui/CardioCalibrationScreen.kt

@@ -0,0 +1,172 @@
+package com.labfytools.trainlog.ui
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import com.labfytools.trainlog.R
+import com.labfytools.trainlog.data.TrainlogRepository
+import com.labfytools.trainlog.model.CardioCalibrationPhase
+import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
+
+@Composable
+fun CardioCalibrationScreen(
+    repository: TrainlogRepository,
+    onChanged: () -> Unit,
+) {
+    val strings = localizedContext()
+    val colors = LocalTrainlogColors.current
+    var revision by remember { mutableIntStateOf(0) }
+    var message by remember { mutableStateOf<String?>(null) }
+    val active = remember(revision) { repository.activeCardioCalibration() }
+    val latest = remember(revision) {
+        repository.listCompletedCardioCalibrations(1).firstOrNull()
+    }
+
+    fun apply(result: TrainlogRepository.CardioCalibrationResult) {
+        message =
+            when (result) {
+                is TrainlogRepository.CardioCalibrationResult.Applied -> {
+                    revision++
+                    onChanged()
+                    null
+                }
+                is TrainlogRepository.CardioCalibrationResult.Invalid -> result.message
+                TrainlogRepository.CardioCalibrationResult.Conflict ->
+                    strings.getString(R.string.calibration_conflict)
+                is TrainlogRepository.CardioCalibrationResult.DatabaseError ->
+                    result.message
+            }
+    }
+
+    fun phaseLabel(phase: CardioCalibrationPhase): String =
+        strings.getString(
+            when (phase) {
+                CardioCalibrationPhase.WARMUP -> R.string.calibration_phase_warmup
+                CardioCalibrationPhase.PROGRESSIVE -> R.string.calibration_phase_progressive
+                CardioCalibrationPhase.HIGH_EFFORT -> R.string.calibration_phase_high_effort
+                CardioCalibrationPhase.RECOVERY -> R.string.calibration_phase_recovery
+                CardioCalibrationPhase.COMPLETED -> R.string.calibration_phase_completed
+                CardioCalibrationPhase.ABORTED -> R.string.calibration_phase_aborted
+            },
+        )
+
+    TrainlogScreen(
+        strings.getString(R.string.route_cardio_calibration),
+        scrollKey = "cardio-calibration",
+    ) {
+        TrainlogInfo(strings.getString(R.string.calibration_explanation), colors.muted)
+
+        if (active == null) {
+            TrainlogPrimaryAction(
+                strings.getString(R.string.calibration_start),
+                strings.getString(R.string.calibration_start_description),
+            ) {
+                apply(repository.startCardioCalibration())
+            }
+            latest?.let { profile ->
+                TrainlogFrame(strings.getString(R.string.calibration_latest)) {
+                    TrainlogInfo(
+                        strings.getString(
+                            R.string.calibration_peak_value,
+                            profile.observedPeakBpm ?: 0,
+                        ),
+                        colors.accent,
+                    )
+                    profile.recovery.forEach { point ->
+                        TrainlogInfo(
+                            strings.getString(
+                                R.string.calibration_recovery_value,
+                                point.targetOffsetSeconds / 60,
+                                point.bpm,
+                            ),
+                            colors.muted,
+                        )
+                    }
+                }
+            }
+        } else {
+            TrainlogFrame(strings.getString(R.string.calibration_current)) {
+                TrainlogInfo(
+                    strings.getString(
+                        R.string.calibration_phase_value,
+                        phaseLabel(active.phase),
+                    ),
+                    colors.accent,
+                )
+                active.observedPeakBpm?.let { bpm ->
+                    TrainlogInfo(
+                        strings.getString(R.string.calibration_peak_value, bpm),
+                        colors.warning,
+                    )
+                }
+                active.recovery.forEach { point ->
+                    TrainlogInfo(
+                        strings.getString(
+                            R.string.calibration_recovery_value,
+                            point.targetOffsetSeconds / 60,
+                            point.bpm,
+                        ),
+                        colors.muted,
+                    )
+                }
+            }
+
+            when (active.phase) {
+                CardioCalibrationPhase.WARMUP -> {
+                    TrainlogPrimaryAction(
+                        strings.getString(R.string.calibration_to_progressive),
+                        strings.getString(R.string.calibration_progressive_description),
+                    ) {
+                        apply(repository.advanceCardioCalibrationPhase())
+                    }
+                }
+                CardioCalibrationPhase.PROGRESSIVE -> {
+                    TrainlogPrimaryAction(
+                        strings.getString(R.string.calibration_to_high_effort),
+                        strings.getString(R.string.calibration_high_effort_description),
+                    ) {
+                        apply(repository.advanceCardioCalibrationPhase())
+                    }
+                }
+                CardioCalibrationPhase.HIGH_EFFORT -> {
+                    TrainlogPrimaryAction(
+                        strings.getString(R.string.calibration_end_effort),
+                        strings.getString(R.string.calibration_end_effort_description),
+                    ) {
+                        apply(repository.markCardioCalibrationEffortEnd())
+                    }
+                }
+                CardioCalibrationPhase.RECOVERY -> {
+                    TrainlogPrimaryAction(
+                        strings.getString(R.string.calibration_finish),
+                        strings.getString(R.string.calibration_finish_description),
+                    ) {
+                        apply(repository.finishCardioCalibration())
+                    }
+                }
+                CardioCalibrationPhase.COMPLETED,
+                CardioCalibrationPhase.ABORTED -> Unit
+            }
+
+            Row(
+                Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.End,
+            ) {
+                TrainlogButton(
+                    strings.getString(R.string.calibration_abort),
+                    { apply(repository.abortCardioCalibration()) },
+                    style = TrainlogButtonStyle.DESTRUCTIVE,
+                )
+            }
+        }
+
+        message?.let { TrainlogInfo(it, colors.error) }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/ui/CardioGuidancePanel.kt

@@ -0,0 +1,385 @@
+package com.labfytools.trainlog.ui
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import com.labfytools.trainlog.R
+import com.labfytools.trainlog.data.CardioGuidanceLiveState
+import com.labfytools.trainlog.data.CardioTargetResolver
+import com.labfytools.trainlog.data.TrainlogRepository
+import com.labfytools.trainlog.model.CardioGuidanceInstruction
+import com.labfytools.trainlog.model.CardioGuidedPhase
+import com.labfytools.trainlog.model.CardioPhaseExitCondition
+import com.labfytools.trainlog.model.CardioPhaseKind
+import com.labfytools.trainlog.model.CardioTargetDefinition
+import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
+import java.util.UUID
+
+@Composable
+internal fun CardioGuidancePanel(
+    repository: TrainlogRepository,
+    entryId: String,
+) {
+    val strings = localizedContext()
+    val colors = LocalTrainlogColors.current
+    var revision by remember(entryId) { mutableStateOf(0) }
+    val active =
+        remember(entryId, revision) {
+            repository.activeCardioGuidancePhase()?.takeIf { it.entryId == entryId }
+        }
+    val calibration =
+        remember(revision) {
+            repository.listCompletedCardioCalibrations(1).firstOrNull()
+        }
+    var live by remember { mutableStateOf(CardioGuidanceLiveState.current()) }
+
+    DisposableEffect(entryId) {
+        val subscription = CardioGuidanceLiveState.subscribe { live = it }
+        onDispose { subscription.close() }
+    }
+
+    TrainlogFrame(
+        title = strings.getString(R.string.cardio_guidance_title),
+        active = active != null,
+    ) {
+        if (active != null) {
+            val phase = active.phase
+            val current = live.takeIf { it.phaseId == phase.phaseId }
+            val instruction = current?.instruction ?: active.currentInstruction
+            val bpm = current?.bpm
+
+            TrainlogInfo(
+                strings.getString(
+                    R.string.cardio_guidance_phase_value,
+                    phaseKindLabel(strings, phase.kind),
+                ),
+                colors.muted,
+            )
+            phase.target?.let { target ->
+                TrainlogInfo(
+                    strings.getString(
+                        R.string.cardio_guidance_target_value,
+                        target.minimumBpm,
+                        target.maximumBpm,
+                    ),
+                    colors.accent,
+                )
+                if (target.calibrationId != null) {
+                    TrainlogInfo(
+                        strings.getString(
+                            R.string.cardio_guidance_calibration_value,
+                            target.calibrationObservedPeakBpm ?: 0,
+                            target.minimumPercent ?: 0,
+                            target.maximumPercent ?: 0,
+                        ),
+                        colors.muted,
+                    )
+                }
+            }
+            TrainlogInfo(
+                guidanceInstructionLabel(strings, instruction),
+                when (instruction) {
+                    CardioGuidanceInstruction.MAINTAIN -> colors.success
+                    CardioGuidanceInstruction.ACCELERATE -> colors.accent
+                    CardioGuidanceInstruction.SLOW_DOWN,
+                    CardioGuidanceInstruction.SUSPENDED -> colors.warning
+                },
+            )
+            TrainlogInfo(
+                if (bpm == null) {
+                    strings.getString(R.string.cardio_guidance_bpm_missing)
+                } else {
+                    strings.getString(R.string.cardio_guidance_bpm_value, bpm)
+                },
+                if (bpm == null) colors.warning else colors.text,
+            )
+            TrainlogButton(
+                label = strings.getString(R.string.cardio_guidance_finish_phase),
+                onClick = {
+                    if (
+                        repository.finishCardioGuidancePhase(phase.phaseId) is
+                            TrainlogRepository.CardioGuidanceMutationResult.Applied
+                    ) {
+                        CardioGuidanceLiveState.clear()
+                        revision++
+                    }
+                },
+                modifier = Modifier.fillMaxWidth(),
+                style = TrainlogButtonStyle.SECONDARY,
+            )
+            return@TrainlogFrame
+        }
+
+        var kind by remember(entryId) { mutableStateOf(CardioPhaseKind.WARMUP) }
+        var targetMode by
+            remember(entryId, calibration?.calibrationId) {
+                mutableStateOf(if (calibration == null) "bpm" else "calibration")
+            }
+        var minimumBpm by remember(entryId) { mutableStateOf("") }
+        var maximumBpm by remember(entryId) { mutableStateOf("") }
+        var minimumPercent by remember(entryId) { mutableStateOf("") }
+        var maximumPercent by remember(entryId) { mutableStateOf("") }
+        var exitMode by remember(entryId) { mutableStateOf("duration") }
+        var durationSeconds by remember(entryId) { mutableStateOf("") }
+        var recoveryBpm by remember(entryId) { mutableStateOf("") }
+        var message by remember(entryId) { mutableStateOf<String?>(null) }
+
+        TrainlogChoiceChips(
+            choices =
+                listOf(
+                    "warmup" to strings.getString(R.string.cardio_phase_warmup),
+                    "work" to strings.getString(R.string.cardio_phase_work),
+                    "recovery" to strings.getString(R.string.cardio_phase_recovery),
+                    "cooldown" to strings.getString(R.string.cardio_phase_cooldown),
+                ),
+            selectedId = kind.wireValue,
+            onSelected = { selected ->
+                kind = CardioPhaseKind.entries.first { it.wireValue == selected }
+            },
+        )
+
+        TrainlogChoiceChips(
+            choices =
+                buildList {
+                    add("bpm" to strings.getString(R.string.cardio_target_absolute))
+                    if (calibration?.observedPeakBpm != null) {
+                        add(
+                            "calibration" to
+                                strings.getString(R.string.cardio_target_calibration),
+                        )
+                    }
+                },
+            selectedId = targetMode,
+            onSelected = { targetMode = it },
+        )
+
+        if (targetMode == "calibration") {
+            calibration?.observedPeakBpm?.let { peak ->
+                TrainlogInfo(
+                    strings.getString(R.string.cardio_guidance_latest_calibration, peak),
+                    colors.muted,
+                )
+            }
+            NumberPair(
+                leftLabel = strings.getString(R.string.cardio_target_min_percent),
+                left = minimumPercent,
+                onLeft = { minimumPercent = digits(it, 3) },
+                rightLabel = strings.getString(R.string.cardio_target_max_percent),
+                right = maximumPercent,
+                onRight = { maximumPercent = digits(it, 3) },
+                suffix = "%",
+            )
+        } else {
+            NumberPair(
+                leftLabel = strings.getString(R.string.cardio_target_min_bpm),
+                left = minimumBpm,
+                onLeft = { minimumBpm = digits(it, 5) },
+                rightLabel = strings.getString(R.string.cardio_target_max_bpm),
+                right = maximumBpm,
+                onRight = { maximumBpm = digits(it, 5) },
+                suffix = "BPM",
+            )
+        }
+
+        TrainlogChoiceChips(
+            choices =
+                listOf(
+                    "duration" to strings.getString(R.string.cardio_exit_duration),
+                    "target" to strings.getString(R.string.cardio_exit_target),
+                    "recover" to strings.getString(R.string.cardio_exit_recover),
+                    "bounded" to strings.getString(R.string.cardio_exit_bounded),
+                ),
+            selectedId = exitMode,
+            onSelected = { exitMode = it },
+        )
+
+        if (exitMode == "duration" || exitMode == "bounded") {
+            TrainlogInputField(
+                label = strings.getString(R.string.cardio_exit_seconds),
+                value = durationSeconds,
+                onValueChange = { durationSeconds = digits(it, 5) },
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                suffix = "s",
+                compact = true,
+            )
+        }
+        if (exitMode == "recover" || exitMode == "bounded") {
+            TrainlogInputField(
+                label = strings.getString(R.string.cardio_exit_recovery_bpm),
+                value = recoveryBpm,
+                onValueChange = { recoveryBpm = digits(it, 5) },
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                suffix = "BPM",
+                compact = true,
+            )
+        }
+
+        val target =
+            if (targetMode == "calibration") {
+                val peak = calibration?.observedPeakBpm
+                val min = minimumPercent.toIntOrNull()
+                val max = maximumPercent.toIntOrNull()
+                if (calibration == null || peak == null || min == null || max == null) {
+                    null
+                } else {
+                    CardioTargetResolver.resolve(
+                        CardioTargetDefinition.CalibrationPercent(
+                            calibration.calibrationId,
+                            peak,
+                            min,
+                            max,
+                        ),
+                    )
+                }
+            } else {
+                val min = minimumBpm.toIntOrNull()
+                val max = maximumBpm.toIntOrNull()
+                if (min == null || max == null) null
+                else CardioTargetResolver.resolve(
+                    CardioTargetDefinition.AbsoluteBpm(min, max),
+                )
+            }
+
+        target?.let {
+            TrainlogInfo(
+                strings.getString(
+                    R.string.cardio_guidance_resolved_target,
+                    it.minimumBpm,
+                    it.maximumBpm,
+                ),
+                colors.accent,
+            )
+        }
+
+        val exit =
+            when (exitMode) {
+                "duration" ->
+                    durationSeconds.toIntOrNull()
+                        ?.takeIf { it in 1..86400 }
+                        ?.let(CardioPhaseExitCondition::FixedDuration)
+                "target" -> CardioPhaseExitCondition.EnterTarget
+                "recover" ->
+                    recoveryBpm.toIntOrNull()
+                        ?.takeIf { it in 1..65535 }
+                        ?.let(CardioPhaseExitCondition::RecoverBelow)
+                "bounded" -> {
+                    val seconds = durationSeconds.toIntOrNull()
+                    val bpm = recoveryBpm.toIntOrNull()
+                    if (seconds != null && bpm != null &&
+                        seconds in 1..86400 && bpm in 1..65535
+                    ) {
+                        CardioPhaseExitCondition.DurationOrRecoverBelow(seconds, bpm)
+                    } else null
+                }
+                else -> null
+            }
+
+        message?.let { TrainlogInfo(it, colors.warning) }
+
+        TrainlogButton(
+            label = strings.getString(R.string.cardio_guidance_start_phase),
+            onClick = {
+                val actualTarget = target
+                val actualExit = exit
+                if (actualTarget == null || actualExit == null) {
+                    message =
+                        strings.getString(R.string.cardio_guidance_invalid_configuration)
+                    return@TrainlogButton
+                }
+                val result =
+                    repository.startCardioGuidancePhase(
+                        entryId,
+                        CardioGuidedPhase(
+                            phaseId = "cgp_" + UUID.randomUUID(),
+                            kind = kind,
+                            target = actualTarget,
+                            exitCondition = actualExit,
+                        ),
+                    )
+                if (result is TrainlogRepository.CardioGuidanceMutationResult.Applied) {
+                    message = null
+                    revision++
+                } else {
+                    message = strings.getString(R.string.cardio_guidance_start_failed)
+                }
+            },
+            modifier = Modifier.fillMaxWidth(),
+            enabled = target != null && exit != null,
+            style = TrainlogButtonStyle.SUCCESS,
+        )
+    }
+}
+
+@Composable
+private fun NumberPair(
+    leftLabel: String,
+    left: String,
+    onLeft: (String) -> Unit,
+    rightLabel: String,
+    right: String,
+    onRight: (String) -> Unit,
+    suffix: String,
+) {
+    Row(
+        Modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.spacedBy(8.dp),
+    ) {
+        TrainlogInputField(
+            label = leftLabel,
+            value = left,
+            onValueChange = onLeft,
+            modifier = Modifier.weight(1f),
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+            suffix = suffix,
+            compact = true,
+        )
+        TrainlogInputField(
+            label = rightLabel,
+            value = right,
+            onValueChange = onRight,
+            modifier = Modifier.weight(1f),
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+            suffix = suffix,
+            compact = true,
+        )
+    }
+}
+
+private fun phaseKindLabel(
+    strings: android.content.Context,
+    kind: CardioPhaseKind,
+): String =
+    strings.getString(
+        when (kind) {
+            CardioPhaseKind.WARMUP -> R.string.cardio_phase_warmup
+            CardioPhaseKind.WORK -> R.string.cardio_phase_work
+            CardioPhaseKind.RECOVERY -> R.string.cardio_phase_recovery
+            CardioPhaseKind.COOLDOWN -> R.string.cardio_phase_cooldown
+        },
+    )
+
+private fun guidanceInstructionLabel(
+    strings: android.content.Context,
+    instruction: CardioGuidanceInstruction,
+): String =
+    strings.getString(
+        when (instruction) {
+            CardioGuidanceInstruction.ACCELERATE -> R.string.cardio_guidance_accelerate
+            CardioGuidanceInstruction.MAINTAIN -> R.string.cardio_guidance_maintain
+            CardioGuidanceInstruction.SLOW_DOWN -> R.string.cardio_guidance_slow_down
+            CardioGuidanceInstruction.SUSPENDED -> R.string.cardio_guidance_suspended
+        },
+    )
+
+private fun digits(value: String, maximum: Int): String =
+    value.filter(Char::isDigit).take(maximum)

android/app/src/main/java/com/labfytools/trainlog/ui/ExerciseScreen.kt

@@ -8,9 +8,12 @@ package com.labfytools.trainlog.ui
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.rememberScrollState
@@ -852,7 +855,11 @@ private fun TrainlogChoiceGroup(
                 ),
         )
 
-        content()
+        FlowRow(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+        ) { content() }
     }
 }
 
@@ -869,15 +876,15 @@ private fun TrainlogChoice(
     Row(
         modifier =
             Modifier
-                .fillMaxWidth()
-                .padding(vertical = 2.dp)
+                .widthIn(min = 132.dp)
                 .heightIn(min = 48.dp)
                 .background(
                     if (selected) {
                         colors.surfaceAlt
                     } else {
                         colors.surface
-                    }
+                    },
+                    androidx.compose.material3.MaterialTheme.shapes.medium,
                 )
                 .semantics { this.selected = selected }
                 .clickable(

android/app/src/main/java/com/labfytools/trainlog/ui/HeartRateDiagnosticsScreen.kt

@@ -0,0 +1,203 @@
+package com.labfytools.trainlog.ui
+
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+import com.labfytools.trainlog.R
+import com.labfytools.trainlog.data.HeartRateBleDiagnostics
+import com.labfytools.trainlog.data.HeartRateDiagnosticPhase
+import com.labfytools.trainlog.data.HeartRateDiagnosticSnapshot
+import com.labfytools.trainlog.data.HeartRateSensorPreferences
+import com.labfytools.trainlog.data.HeartRateSensorService
+import com.labfytools.trainlog.data.hasHeartRateBleRuntimePermissions
+import com.labfytools.trainlog.data.heartRateBleRuntimePermissions
+import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
+
+@Composable
+fun HeartRateDiagnosticsScreen(onSelected: () -> Unit) {
+    val context = LocalContext.current
+    val strings = localizedContext()
+    val colors = LocalTrainlogColors.current
+    var snapshot by remember { mutableStateOf(HeartRateDiagnosticSnapshot()) }
+    var pendingExpandedScan by remember { mutableStateOf(false) }
+    var permissionDenied by remember { mutableStateOf(false) }
+    val diagnostics =
+        remember(context) {
+            HeartRateBleDiagnostics(context) { next -> snapshot = next }
+        }
+
+    DisposableEffect(diagnostics) {
+        onDispose { diagnostics.close() }
+    }
+
+    val permissionLauncher =
+        rememberLauncherForActivityResult(
+            ActivityResultContracts.RequestMultiplePermissions(),
+        ) { results ->
+            if (heartRateBleRuntimePermissions().all { results[it] == true }) {
+                permissionDenied = false
+                diagnostics.startScan(pendingExpandedScan)
+            } else {
+                permissionDenied = true
+            }
+        }
+
+    fun scan(expanded: Boolean) {
+        pendingExpandedScan = expanded
+        if (hasHeartRateBleRuntimePermissions(context)) {
+            permissionDenied = false
+            diagnostics.startScan(expanded)
+        } else {
+            permissionLauncher.launch(heartRateBleRuntimePermissions())
+        }
+    }
+
+    fun phaseLabel(): String =
+        strings.getString(
+            when (snapshot.phase) {
+                HeartRateDiagnosticPhase.IDLE -> R.string.hr_diag_idle
+                HeartRateDiagnosticPhase.SCANNING -> R.string.hr_diag_scanning
+                HeartRateDiagnosticPhase.CONNECTING -> R.string.hr_diag_connecting
+                HeartRateDiagnosticPhase.DISCOVERING -> R.string.hr_diag_discovering
+                HeartRateDiagnosticPhase.SUBSCRIBING -> R.string.hr_diag_subscribing
+                HeartRateDiagnosticPhase.RECEIVING -> R.string.hr_diag_receiving
+                HeartRateDiagnosticPhase.DISCONNECTED -> R.string.hr_diag_disconnected
+                HeartRateDiagnosticPhase.ERROR -> R.string.hr_diag_error
+            },
+        )
+
+    TrainlogScreen(strings.getString(R.string.route_heart_rate_diagnostics)) {
+        TrainlogFrame(strings.getString(R.string.hr_diag_status)) {
+            TrainlogInfo(
+                phaseLabel(),
+                when (snapshot.phase) {
+                    HeartRateDiagnosticPhase.RECEIVING -> colors.success
+                    HeartRateDiagnosticPhase.ERROR -> colors.error
+                    HeartRateDiagnosticPhase.CONNECTING,
+                    HeartRateDiagnosticPhase.DISCOVERING,
+                    HeartRateDiagnosticPhase.SUBSCRIBING,
+                    HeartRateDiagnosticPhase.SCANNING -> colors.warning
+                    else -> colors.muted
+                },
+            )
+            if (permissionDenied) {
+                TrainlogInfo(strings.getString(R.string.hr_diag_permission_denied), colors.error)
+            }
+            snapshot.diagnostic?.let {
+                TrainlogInfo(strings.getString(R.string.hr_diag_technical, it), colors.muted)
+            }
+            TrainlogInfo(
+                strings.getString(
+                    R.string.hr_diag_services,
+                    if (snapshot.serviceFound) strings.getString(R.string.yes) else strings.getString(R.string.no),
+                    if (snapshot.measurementFound) strings.getString(R.string.yes) else strings.getString(R.string.no),
+                    if (snapshot.batteryServiceFound) strings.getString(R.string.yes) else strings.getString(R.string.no),
+                ),
+            )
+            snapshot.latestMeasurement?.let { measurement ->
+                TrainlogInfo(
+                    strings.getString(R.string.hr_diag_bpm, measurement.bpm),
+                    colors.success,
+                )
+                TrainlogInfo(
+                    strings.getString(
+                        R.string.hr_diag_measurement_meta,
+                        measurement.rrIntervals1024.size,
+                        measurement.sensorContactDetected?.let { if (it) strings.getString(R.string.yes) else strings.getString(R.string.no) } ?: "—",
+                        measurement.energyExpended?.toString() ?: "—",
+                    ),
+                    colors.muted,
+                )
+            }
+            TrainlogInfo(
+                strings.getString(R.string.hr_diag_notifications, snapshot.notificationCount),
+                colors.muted,
+            )
+            if (
+                snapshot.phase == HeartRateDiagnosticPhase.RECEIVING &&
+                snapshot.selectedAddress != null
+            ) {
+                TrainlogButton(
+                    strings.getString(R.string.hr_diag_use_sensor),
+                    {
+                        val address = checkNotNull(snapshot.selectedAddress)
+                        val name =
+                            snapshot.devices
+                                .firstOrNull { it.address == address }
+                                ?.name
+                        diagnostics.close()
+                        HeartRateSensorPreferences(context).select(address, name)
+                        HeartRateSensorService.start(context)
+                        onSelected()
+                    },
+                    Modifier.fillMaxWidth(),
+                    style = TrainlogButtonStyle.SUCCESS,
+                )
+            }
+        }
+
+        TrainlogFrame(strings.getString(R.string.hr_diag_scan_section)) {
+            Row(
+                Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                TrainlogButton(
+                    strings.getString(R.string.hr_diag_scan),
+                    { scan(false) },
+                    Modifier.weight(1f),
+                    enabled = snapshot.phase != HeartRateDiagnosticPhase.SCANNING,
+                )
+                TrainlogButton(
+                    strings.getString(R.string.hr_diag_scan_all),
+                    { scan(true) },
+                    Modifier.weight(1f),
+                    enabled = snapshot.phase != HeartRateDiagnosticPhase.SCANNING,
+                )
+            }
+            TrainlogInfo(strings.getString(R.string.hr_diag_scan_description), colors.muted)
+        }
+
+        TrainlogFrame(
+            strings.getString(R.string.hr_diag_devices),
+            active = snapshot.devices.isNotEmpty(),
+        ) {
+            if (snapshot.devices.isEmpty()) {
+                TrainlogInfo(strings.getString(R.string.hr_diag_no_devices), colors.muted)
+            }
+            snapshot.devices.forEach { device ->
+                val title =
+                    device.name?.takeIf { it.isNotBlank() }
+                        ?: strings.getString(R.string.hr_diag_unnamed_device)
+                val advertised =
+                    strings.getString(
+                        if (device.advertisesHeartRate) {
+                            R.string.hr_diag_hrs_advertised
+                        } else {
+                            R.string.hr_diag_hrs_not_advertised
+                        },
+                    )
+                TrainlogAction(
+                    title,
+                    strings.getString(
+                        R.string.hr_diag_device_description,
+                        device.address,
+                        device.rssi,
+                        advertised,
+                    ),
+                    { diagnostics.connect(device.address) },
+                )
+            }
+        }
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/ui/HeartRateIndicator.kt

@@ -0,0 +1,98 @@
+package com.labfytools.trainlog.ui
+
+import androidx.compose.animation.core.RepeatMode
+import androidx.compose.animation.core.animateFloat
+import androidx.compose.animation.core.infiniteRepeatable
+import androidx.compose.animation.core.rememberInfiniteTransition
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.padding
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.scale
+import androidx.compose.ui.semantics.contentDescription
+import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.labfytools.trainlog.R
+import com.labfytools.trainlog.data.HeartRateLivePhase
+import com.labfytools.trainlog.data.HeartRateLiveState
+import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
+
+@Composable
+internal fun HeartRateIndicator() {
+    var live by remember { mutableStateOf(HeartRateLiveState.current()) }
+    DisposableEffect(Unit) {
+        val subscription = HeartRateLiveState.subscribe { live = it }
+        onDispose { subscription.close() }
+    }
+
+    val colors = LocalTrainlogColors.current
+    val strings = localizedContext()
+    val bpm =
+        live.bpm?.takeIf {
+            live.phase == HeartRateLivePhase.CONNECTED
+        }
+    val color =
+        when (live.phase) {
+            HeartRateLivePhase.CONNECTED -> colors.success
+            HeartRateLivePhase.CONNECTING,
+            HeartRateLivePhase.STALE -> colors.warning
+            HeartRateLivePhase.DISCONNECTED -> colors.muted
+        }
+
+    val beatPeriodMs =
+        bpm?.takeIf { it > 0 }
+            ?.let { (60_000 / it).coerceIn(300, 2_000) }
+            ?: 1_000
+    val transition = rememberInfiniteTransition(label = "heart-rate-pulse")
+    val scale by
+        transition.animateFloat(
+            initialValue = 1f,
+            targetValue = if (bpm != null) 1.14f else 1f,
+            animationSpec =
+                infiniteRepeatable(
+                    animation = tween(durationMillis = beatPeriodMs / 2),
+                    repeatMode = RepeatMode.Reverse,
+                ),
+            label = "heart-rate-scale",
+        )
+
+    val description =
+        when (live.phase) {
+            HeartRateLivePhase.CONNECTED ->
+                strings.getString(R.string.heart_rate_a11y_connected, bpm ?: 0)
+            HeartRateLivePhase.CONNECTING ->
+                strings.getString(R.string.heart_rate_a11y_connecting)
+            HeartRateLivePhase.STALE ->
+                strings.getString(R.string.heart_rate_a11y_reconnecting)
+            HeartRateLivePhase.DISCONNECTED ->
+                strings.getString(R.string.heart_rate_a11y_disconnected)
+        }
+
+    Row(
+        modifier =
+            Modifier
+                .padding(horizontal = 4.dp)
+                .semantics { contentDescription = description },
+        horizontalArrangement = Arrangement.spacedBy(5.dp),
+    ) {
+        androidx.compose.material3.Text(
+            "♥",
+            color = color,
+            fontSize = 20.sp,
+            modifier = Modifier.scale(scale),
+        )
+        androidx.compose.material3.Text(
+            bpm?.let { "$it BPM" } ?: "-- BPM",
+            color = color,
+            fontSize = 14.sp,
+        )
+    }
+}

android/app/src/main/java/com/labfytools/trainlog/ui/HistoryScreen.kt

@@ -12,6 +12,7 @@ import com.labfytools.trainlog.model.SessionType
 import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
 import com.labfytools.trainlog.R
 import java.time.OffsetDateTime
+import java.time.LocalDate
 import java.time.format.DateTimeFormatter
 
 @Composable
@@ -133,7 +134,8 @@ internal fun formatStartedAt(
 internal fun formatDate(value: String): String {
     val locale = presentationLocale()
     val pattern = uiString(R.string.date_pattern)
-    return runCatching {
-        OffsetDateTime.parse(value).format(DateTimeFormatter.ofPattern(pattern, locale))
-    }.getOrElse { value.take(10) }
+    val formatter = DateTimeFormatter.ofPattern(pattern, locale)
+    return runCatching { LocalDate.parse(value.take(10)).format(formatter) }
+        .recoverCatching { OffsetDateTime.parse(value).format(formatter) }
+        .getOrElse { value.take(10) }
 }

android/app/src/main/java/com/labfytools/trainlog/ui/HomeScreen.kt

@@ -20,7 +20,6 @@ import androidx.compose.foundation.layout.IntrinsicSize
 import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.BasicText
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Text
@@ -52,8 +51,6 @@ import com.labfytools.trainlog.data.BodyZoneHomeOverview
 import com.labfytools.trainlog.data.BodyZoneHomeState
 import com.labfytools.trainlog.data.BodyZoneHomeStatus
 import com.labfytools.trainlog.model.ActiveSessionDraft
-import com.labfytools.trainlog.model.LatestExerciseMax
-import com.labfytools.trainlog.model.SessionSummary
 import com.labfytools.trainlog.model.SessionType
 import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
 import com.labfytools.trainlog.ui.theme.TrainlogColors
@@ -64,19 +61,14 @@ import com.labfytools.trainlog.R
 fun HomeScreen(
     activeDraft: ActiveSessionDraft?,
     draftError: String?,
-    latestSession: SessionSummary?,
-    latestMaximum: LatestExerciseMax?,
     bodyZoneOverview: BodyZoneHomeOverview,
     onSession: () -> Unit,
     onOpenExercises: (String) -> Unit,
-    onOpenStatistics: () -> Unit,
     onBody: () -> Unit,
-    onOpenLatestSession: (String) -> Unit,
     onSync: () -> Unit,
 ) {
     val colors = LocalTrainlogColors.current
     val strings = localizedContext()
-    val locale = presentationLocale()
     TrainlogScreen(strings.getString(R.string.nav_home), scrollKey = "home") {
         draftError?.let { TrainlogInfo(it, colors.error) }
         TrainlogFrame(strings.getString(R.string.home_session)) {
@@ -87,17 +79,7 @@ fun HomeScreen(
                 TrainlogPrimaryAction(strings.getString(R.string.new_manual_session), strings.getString(R.string.new_manual_description), onSession)
             }
         }
-        BodyZoneHomeSection(bodyZoneOverview, onOpenExercises, onOpenStatistics)
-        latestSession?.let { session ->
-            TrainlogFrame(strings.getString(R.string.latest_session)) {
-                TrainlogAction(formatStartedAt(session.startedAt), sessionTypeLabel(session.sessionType) + " · " +
-                    strings.resources.getQuantityString(R.plurals.exercise_count, session.exerciseCount, session.exerciseCount), { onOpenLatestSession(session.sessionId) })
-            }
-        }
-        latestMaximum?.let { maximum ->
-            val weight = "%.2f".format(locale, maximum.maxWeightKg).trimEnd('0').trimEnd(',', '.')
-            TrainlogInfo(strings.getString(R.string.latest_max_value, maximum.exerciseName, weight, formatDate(maximum.startedAt)), colors.warning)
-        }
+        BodyZoneHomeSection(bodyZoneOverview, onOpenExercises)
         TrainlogFrame(strings.getString(R.string.quick_access), active = false) {
             Row(Modifier.fillMaxWidth().height(IntrinsicSize.Min).testTag("home-quick-actions-row"),
                 horizontalArrangement = Arrangement.spacedBy(10.dp)) {
@@ -119,7 +101,6 @@ fun HomeScreen(
 internal fun BodyZoneHomeSection(
     overview: BodyZoneHomeOverview,
     onOpenExercises: (String) -> Unit,
-    onOpenStatistics: () -> Unit,
 ) {
     val colors = LocalTrainlogColors.current
     val strings = localizedContext()
@@ -159,7 +140,9 @@ internal fun BodyZoneHomeSection(
         }
         selected?.let { zone ->
             Column(
-                Modifier.fillMaxWidth().padding(top = 8.dp).background(colors.surface, RoundedCornerShape(8.dp)).padding(12.dp),
+                Modifier.fillMaxWidth().padding(top = 8.dp)
+                    .background(colors.surface, androidx.compose.material3.MaterialTheme.shapes.medium)
+                    .padding(12.dp),
                 verticalArrangement = Arrangement.spacedBy(4.dp),
             ) {
                 BasicText(localizedBodyZoneName(strings, zone.zoneId, zone.displayName), style = TrainlogTypography.section.copy(color = colors.text))
@@ -179,7 +162,6 @@ internal fun BodyZoneHomeSection(
                 )
                 if (zone.availableExerciseCount == 0) TrainlogInfo(BodyZoneHomeState.UNSUPPORTED.label, colors.muted)
                 TrainlogAction(strings.getString(R.string.view_exercises), "", { onOpenExercises(zone.zoneId) })
-                TrainlogAction(strings.getString(R.string.view_statistics), "", onOpenStatistics)
             }
         }
     }

android/app/src/main/java/com/labfytools/trainlog/ui/ProgramScreens.kt

@@ -0,0 +1,210 @@
+package com.labfytools.trainlog.ui
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
+import com.labfytools.trainlog.R
+import com.labfytools.trainlog.data.StartProgramSessionResult
+import com.labfytools.trainlog.data.TrainlogRepository
+import com.labfytools.trainlog.model.ProgramSessionExecutionState
+
+/** Presentation-only list for the desktop-owned Programs projection. */
+@Composable
+fun ProgramsScreen(repository: TrainlogRepository, onOpen: (String) -> Unit) {
+    val strings = localizedContext()
+    val programs = repository.listSyncedPrograms()
+    val colors = LocalTrainlogColors.current
+    TrainlogScreen(strings.getString(R.string.route_programs)) {
+        if (programs.isEmpty()) TrainlogInfo(strings.getString(R.string.programs_none))
+        programs.forEach { program ->
+            val detail = remember(program.programId) { repository.getSyncedProgram(program.programId) }
+            val completed = detail?.sessions?.count {
+                it.executionState == ProgramSessionExecutionState.COMPLETED
+            } ?: 0
+            Column(
+                Modifier.fillMaxWidth().padding(bottom = 10.dp)
+                    .background(colors.surface, MaterialTheme.shapes.medium).padding(12.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
+                    Text(
+                        program.title,
+                        modifier = Modifier.weight(1f).padding(end = 8.dp),
+                        color = colors.text,
+                        fontWeight = FontWeight.Bold,
+                    )
+                    ProgramStateBadge(
+                        if (program.state == "active") strings.getString(R.string.program_active)
+                        else strings.getString(R.string.program_archived),
+                        program.state == "active",
+                    )
+                }
+                TrainlogInfo(
+                    listOfNotNull(
+                        program.startDate?.let { strings.getString(R.string.program_start_date, formatDate(it)) },
+                        program.endDate?.let { strings.getString(R.string.program_end_date, formatDate(it)) },
+                        strings.resources.getQuantityString(
+                            R.plurals.program_session_count,
+                            program.sessionCount,
+                            program.sessionCount,
+                        ),
+                    ).joinToString(" · "),
+                )
+                TrainlogInfo("$completed / ${program.sessionCount} · ${strings.getString(R.string.program_session_completed)}", if (completed > 0) colors.success else colors.muted)
+                TrainlogButton(
+                    strings.getString(R.string.program_open),
+                    { onOpen(program.programId) },
+                    Modifier.testTag("program-${program.programId}"),
+                )
+            }
+        }
+    }
+}
+
+/** Program definitions remain read-only; only the local execution draft mutates. */
+@Composable
+fun ProgramDetailScreen(
+    repository: TrainlogRepository,
+    programId: String,
+    onOpenActiveSession: () -> Unit,
+) {
+    val strings = localizedContext()
+    var revision by remember { mutableIntStateOf(0) }
+    var message by remember { mutableStateOf<String?>(null) }
+    val program = remember(programId, revision) { repository.getSyncedProgram(programId) }
+
+    fun start(programSessionId: String) {
+        when (val result = repository.startSyncedProgramSession(programId, programSessionId)) {
+            StartProgramSessionResult.Started,
+            StartProgramSessionResult.AlreadyActive -> onOpenActiveSession()
+            StartProgramSessionResult.AlreadyCompleted -> {
+                message = strings.getString(R.string.program_session_completed_detail)
+                revision++
+            }
+            StartProgramSessionResult.ExistingUnrelatedDraft -> {
+                message = strings.getString(R.string.existing_draft_warning)
+            }
+            StartProgramSessionResult.NotAvailable -> {
+                message = strings.getString(R.string.program_session_unavailable)
+            }
+            is StartProgramSessionResult.Error -> message = result.message
+        }
+    }
+
+    TrainlogScreen(strings.getString(R.string.route_program_detail)) {
+        if (program == null) {
+            TrainlogInfo(strings.getString(R.string.program_not_found))
+            return@TrainlogScreen
+        }
+        TrainlogFrame(program.title, active = program.state == "active") {
+            TrainlogInfo(strings.getString(if (program.state == "active") R.string.program_active else R.string.program_archived))
+            program.startDate?.let { TrainlogInfo(strings.getString(R.string.program_start_date, formatDate(it))) }
+            program.endDate?.let { TrainlogInfo(strings.getString(R.string.program_end_date, formatDate(it))) }
+            program.note?.let { TrainlogInfo(it) }
+            val completed = program.sessions.count { it.executionState == ProgramSessionExecutionState.COMPLETED }
+            TrainlogInfo("$completed / ${program.sessions.size} · ${strings.getString(R.string.program_session_completed)}", if (completed > 0) LocalTrainlogColors.current.success else LocalTrainlogColors.current.muted)
+        }
+        message?.let { TrainlogInfo(it) }
+        program.sessions.forEachIndexed { index, session ->
+            var expanded by remember(session.programSessionId) { mutableStateOf(false) }
+            val completed = session.executionState == ProgramSessionExecutionState.COMPLETED
+            Column(
+                Modifier.fillMaxWidth().padding(bottom = 10.dp)
+                    .background(
+                        if (completed) LocalTrainlogColors.current.success.copy(alpha = .12f)
+                        else LocalTrainlogColors.current.surface,
+                        MaterialTheme.shapes.medium,
+                    ).padding(12.dp),
+                verticalArrangement = Arrangement.spacedBy(6.dp),
+            ) {
+                val stateLabel = when (session.executionState) {
+                    ProgramSessionExecutionState.TODO -> R.string.program_session_todo
+                    ProgramSessionExecutionState.IN_PROGRESS -> R.string.program_session_in_progress
+                    ProgramSessionExecutionState.COMPLETED -> R.string.program_session_completed
+                }
+                Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
+                    Text(
+                        "${index + 1}. ${session.title}",
+                        modifier = Modifier.weight(1f).padding(end = 8.dp),
+                        color = LocalTrainlogColors.current.text,
+                        fontWeight = FontWeight.Bold,
+                    )
+                    ProgramStateBadge(strings.getString(stateLabel), completed)
+                }
+                TrainlogInfo(
+                    listOfNotNull(
+                        strings.getString(if (session.sessionType == "max_test") R.string.session_max_test else R.string.session_training),
+                        session.plannedFor?.let { strings.getString(R.string.planned_for, formatDate(it)) },
+                        strings.resources.getQuantityString(R.plurals.exercise_count, session.occurrences.size, session.occurrences.size),
+                    ).joinToString(" · "),
+                )
+                session.note?.let { TrainlogInfo(it) }
+                TrainlogButton(
+                    strings.getString(
+                        if (expanded) R.string.program_session_hide_occurrences
+                        else R.string.program_session_show_occurrences,
+                    ),
+                    { expanded = !expanded },
+                    Modifier.testTag("program-session-toggle-${session.programSessionId}"),
+                )
+                when (session.executionState) {
+                    ProgramSessionExecutionState.TODO -> TrainlogButton(
+                        strings.getString(R.string.program_session_start),
+                        { start(session.programSessionId) },
+                        Modifier.testTag("program-session-start-${session.programSessionId}"),
+                    )
+                    ProgramSessionExecutionState.IN_PROGRESS -> TrainlogButton(
+                        strings.getString(R.string.program_session_resume),
+                        onOpenActiveSession,
+                        Modifier.testTag("program-session-resume-${session.programSessionId}"),
+                    )
+                    ProgramSessionExecutionState.COMPLETED -> TrainlogInfo(
+                        strings.getString(R.string.program_session_completed_detail),
+                    )
+                }
+                if (expanded) session.occurrences.forEachIndexed { occurrenceIndex, occurrence ->
+                    val target = occurrence.targetReps?.let { strings.getString(R.string.program_target_reps, it) }
+                        ?: occurrence.targetDurationSeconds?.let { strings.getString(R.string.program_target_duration, it) }.orEmpty()
+                    val sets = occurrence.targetSets?.let { strings.getString(R.string.program_target_sets, it) }.orEmpty()
+                    val weight = occurrence.targetWeightKg?.let { strings.getString(R.string.program_target_weight, it) }.orEmpty()
+                    TrainlogInfo(
+                        "${occurrenceIndex + 1}. ${occurrence.exerciseName}" +
+                            listOf(sets, target, weight).filter { it.isNotEmpty() }.joinToString(" · ", prefix = " · "),
+                    )
+                    occurrence.notes?.let { TrainlogInfo(it) }
+                }
+            }
+        }
+    }
+}
+
+/** Presentation-only state badge; execution truth remains repository-owned. */
+@Composable
+private fun ProgramStateBadge(label: String, positive: Boolean) {
+    val colors = LocalTrainlogColors.current
+    Text(
+        label,
+        modifier = Modifier.background(
+            (if (positive) colors.success else colors.surfaceAlt).copy(alpha = .22f),
+            MaterialTheme.shapes.small,
+        ).padding(horizontal = 8.dp, vertical = 4.dp),
+        color = if (positive) colors.success else colors.muted,
+        style = MaterialTheme.typography.labelMedium,
+    )
+}

android/app/src/main/java/com/labfytools/trainlog/ui/SectionScreens.kt

@@ -9,16 +9,23 @@ import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.IntrinsicSize
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.widthIn
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.platform.LocalContext
@@ -31,8 +38,14 @@ import com.labfytools.trainlog.data.KnowledgeConfidence
 import com.labfytools.trainlog.data.SyncCatalogInbox
 import com.labfytools.trainlog.data.StartAiSessionDraftResult
 import com.labfytools.trainlog.data.TrainlogRepository
+import com.labfytools.trainlog.data.AndroidBackupService
+import com.labfytools.trainlog.data.AndroidBackupResult
+import com.labfytools.trainlog.data.HeartRateSensorPreferences
+import com.labfytools.trainlog.data.HeartRateSensorService
 import com.labfytools.trainlog.data.directStoragePermissionIntent
 import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.ui.theme.TrainlogTypography
 import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
 import com.labfytools.trainlog.R
 
@@ -44,6 +57,8 @@ fun SessionsHub(
     onManual: () -> Unit,
     onDrafts: () -> Unit,
     onHistory: () -> Unit,
+    onPrograms: () -> Unit = {},
+    onCardioCalibration: () -> Unit = {},
 ) {
     val colors = LocalTrainlogColors.current
     val strings = localizedContext()
@@ -63,8 +78,18 @@ fun SessionsHub(
                     Modifier.weight(1f).fillMaxHeight().testTag("sessions-drafts-action"))
             }
         }
+        TrainlogButton(
+            strings.getString(R.string.route_cardio_calibration),
+            onCardioCalibration,
+            Modifier.fillMaxWidth().testTag("sessions-cardio-calibration-action"),
+            style = TrainlogButtonStyle.SUCCESS,
+        )
+        Spacer(Modifier.height(10.dp))
         TrainlogButton(strings.getString(R.string.route_completed_sessions), onHistory,
             Modifier.fillMaxWidth().testTag("sessions-history-action"))
+        Spacer(Modifier.height(16.dp).testTag("sessions-programs-spacing"))
+        TrainlogButton(strings.getString(R.string.route_programs), onPrograms,
+            Modifier.fillMaxWidth().testTag("sessions-programs-action"))
     }
 }
 
@@ -81,24 +106,38 @@ fun AiSessionDraftsScreen(
     var message by remember { mutableStateOf<String?>(null) }
     var pendingDeletion by remember { mutableStateOf<Pair<String, String>?>(null) }
     val drafts = remember(externalRevision, revision) { repository.listAiSessionDrafts() }
+    val preparations = remember(externalRevision, revision) { repository.listPreparedSessions() }
     TrainlogScreen(strings.getString(R.string.route_ai_drafts)) {
         message?.let { TrainlogInfo(it) }
-        if (drafts.isEmpty()) TrainlogInfo(strings.getString(R.string.draft_none))
+        if (drafts.isEmpty() && preparations.isEmpty()) TrainlogInfo(strings.getString(R.string.draft_none))
+        preparations.forEach { preparation ->
+            DraftSummaryCard(
+                title = preparation.title,
+                provenance = strings.getString(R.string.manual_preparation),
+                plannedFor = preparation.plannedFor,
+                notes = preparation.notes,
+                entries = preparation.entries,
+                startDescription = strings.getString(R.string.start_preparation_description),
+                onStart = {
+                    when (val result = repository.startPreparedSession(preparation.deliveryId)) {
+                        StartAiSessionDraftResult.Started -> { onPendingChanged(); onStarted() }
+                        StartAiSessionDraftResult.ExistingActiveDraft ->
+                            message = strings.getString(R.string.draft_already_active)
+                        StartAiSessionDraftResult.NotPending -> { message = strings.getString(R.string.draft_missing); revision++; onPendingChanged() }
+                        is StartAiSessionDraftResult.Error -> message = localizedRepositoryMessage(strings, result.message)
+                    }
+                },
+            )
+        }
         drafts.forEach { draft ->
-            TrainlogFrame(draft.title ?: strings.getString(R.string.session_proposal), active = true) {
-                TrainlogInfo(listOfNotNull(
-                    draft.plannedFor?.let { strings.getString(R.string.planned_for, formatDate(it)) },
-                    strings.resources.getQuantityString(R.plurals.exercise_count, draft.entries.size, draft.entries.size),
-                ).joinToString(" · "))
-                draft.notes?.let { TrainlogInfo(it) }
-                draft.entries.forEach { entry ->
-                    val plan = checkNotNull(entry.plan)
-                    val metric = plan.reps?.let { strings.resources.getQuantityString(R.plurals.repetition_count, it, it) }
-                        ?: plan.durationSeconds?.let { strings.resources.getQuantityString(R.plurals.seconds_count, it, it) }.orEmpty()
-                    val weight = plan.weightKg?.let { " · $it kg" }.orEmpty()
-                    TrainlogInfo(strings.getString(R.string.plan_draft_summary, entry.exercise.name, plan.sets, metric, weight, plan.restSeconds))
-                }
-                TrainlogPrimaryAction(strings.getString(R.string.start), strings.getString(R.string.start_proposal_description)) {
+            DraftSummaryCard(
+                title = draft.title ?: strings.getString(R.string.session_proposal),
+                provenance = strings.getString(R.string.session_proposal),
+                plannedFor = draft.plannedFor,
+                notes = draft.notes,
+                entries = draft.entries,
+                startDescription = strings.getString(R.string.start_proposal_description),
+                onStart = {
                     when (val result = repository.startAiSessionDraft(draft.draftId)) {
                         StartAiSessionDraftResult.Started -> {
                             onPendingChanged()
@@ -113,15 +152,24 @@ fun AiSessionDraftsScreen(
                         }
                         is StartAiSessionDraftResult.Error -> message = localizedRepositoryMessage(strings, result.message)
                     }
-                }
-                TrainlogDeleteButton(
-                    contentDescription = localizedContext().getString(R.string.a11y_delete_draft),
-                    modifier = Modifier.testTag("delete-ai-draft-${draft.draftId}"),
-                    onClick = {
-                        pendingDeletion = draft.draftId to (draft.title ?: strings.getString(R.string.session_proposal))
-                    },
-                )
-            }
+                },
+                footer = {
+                    Row(
+                        Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.End,
+                    ) {
+                        TrainlogDeleteButton(
+                            contentDescription = localizedContext().getString(R.string.a11y_delete_draft),
+                            modifier = Modifier.testTag("delete-ai-draft-${draft.draftId}"),
+                            fullWidth = false,
+                            onClick = {
+                                pendingDeletion = draft.draftId to
+                                    (draft.title ?: strings.getString(R.string.session_proposal))
+                            },
+                        )
+                    }
+                },
+            )
         }
     }
     pendingDeletion?.let { (draftId, title) ->
@@ -147,6 +195,138 @@ fun AiSessionDraftsScreen(
     }
 }
 
+/** Compact presentation of an inert preparation; starting remains caller-owned. */
+@Composable
+private fun DraftSummaryCard(
+    title: String,
+    provenance: String,
+    plannedFor: String?,
+    notes: String?,
+    entries: List<SessionExerciseDraft>,
+    startDescription: String,
+    onStart: () -> Unit,
+    footer: (@Composable () -> Unit)? = null,
+) {
+    val colors = LocalTrainlogColors.current
+    val strings = localizedContext()
+    Column(Modifier.fillMaxWidth().padding(bottom = 12.dp)) {
+        TrainlogCompactCard {
+            androidx.compose.material3.Text(
+                title,
+                color = colors.text,
+                style = TrainlogTypography.section,
+                fontWeight = FontWeight.Bold,
+            )
+            Row(
+                Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(6.dp),
+            ) {
+                TrainlogMetaBadge(provenance, Modifier.weight(1f))
+                TrainlogMetaBadge(
+                    strings.resources.getQuantityString(
+                        R.plurals.exercise_count,
+                        entries.size,
+                        entries.size,
+                    ),
+                )
+            }
+            plannedFor?.let {
+                androidx.compose.material3.Text(
+                    strings.getString(R.string.planned_for, formatDate(it)),
+                    color = colors.muted,
+                    style = TrainlogTypography.small,
+                )
+            }
+            notes?.takeIf { it.isNotBlank() }?.let {
+                androidx.compose.material3.Text(
+                    it,
+                    color = colors.muted,
+                    style = TrainlogTypography.small,
+                    maxLines = 2,
+                )
+            }
+            Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                entries.forEach { DraftExerciseRow(it) }
+            }
+            Row(
+                Modifier.fillMaxWidth().padding(top = 4.dp),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                TrainlogButton(
+                    strings.getString(R.string.start),
+                    onStart,
+                    Modifier.widthIn(min = 128.dp),
+                    style = TrainlogButtonStyle.SUCCESS,
+                )
+                androidx.compose.material3.Text(
+                    startDescription,
+                    modifier = Modifier.weight(1f),
+                    color = colors.muted,
+                    style = TrainlogTypography.small,
+                    maxLines = 2,
+                )
+            }
+            footer?.invoke()
+        }
+    }
+}
+
+@Composable
+private fun DraftExerciseRow(entry: SessionExerciseDraft) {
+    val colors = LocalTrainlogColors.current
+    val plan = checkNotNull(entry.plan)
+    Column(
+        Modifier.fillMaxWidth()
+            .background(colors.background, androidx.compose.material3.MaterialTheme.shapes.small)
+            .padding(horizontal = 10.dp, vertical = 8.dp),
+    ) {
+        androidx.compose.material3.Text(
+            entry.exercise.name,
+            color = colors.text,
+            style = TrainlogTypography.small,
+            fontWeight = FontWeight.SemiBold,
+        )
+        androidx.compose.material3.Text(
+            draftPlanSummary(plan.sets, plan.reps, plan.durationSeconds, plan.weightKg, plan.restSeconds),
+            color = colors.muted,
+            style = TrainlogTypography.small,
+        )
+    }
+}
+
+@Composable
+private fun draftPlanSummary(
+    sets: Int,
+    reps: Int?,
+    durationSeconds: Int?,
+    weightKg: Double?,
+    restSeconds: Int,
+): String {
+    val strings = localizedContext()
+    val metric = when {
+        reps != null -> "$sets × $reps"
+        durationSeconds != null && sets > 0 -> "$sets × ${humanDuration(durationSeconds)}"
+        durationSeconds != null -> humanDuration(durationSeconds)
+        else -> "—"
+    }
+    return buildList {
+        add(metric)
+        weightKg?.let { add("${it.toString().trimEnd('0').trimEnd('.')} kg") }
+        if (restSeconds > 0) add(strings.getString(R.string.draft_rest_short, restSeconds))
+    }.joinToString(" · ")
+}
+
+@Composable
+private fun humanDuration(seconds: Int): String {
+    val strings = localizedContext()
+    return if (seconds % 60 == 0) {
+        val minutes = seconds / 60
+        strings.resources.getQuantityString(R.plurals.duration_minutes_value, minutes, minutes)
+    } else {
+        strings.resources.getQuantityString(R.plurals.duration_seconds_value, seconds, seconds)
+    }
+}
+
 @Composable
 fun LatestMaximaScreen(repository: TrainlogRepository) {
     val colors = LocalTrainlogColors.current
@@ -154,13 +334,29 @@ fun LatestMaximaScreen(repository: TrainlogRepository) {
     val locale = presentationLocale()
     val strings = localizedContext()
     TrainlogScreen(strings.getString(R.string.route_latest_maxima)) {
-        TrainlogFrame(strings.getString(R.string.max_capacities), active = maxima.isNotEmpty()) {
-            if (maxima.isEmpty()) TrainlogInfo(strings.getString(R.string.max_none))
-            maxima.forEach { max ->
-                val weight = "%.2f".format(locale, max.maxWeightKg).trimEnd('0').trimEnd(',', '.')
-                TrainlogInfo("${max.exerciseName} · $weight kg", colors.warning)
-                TrainlogInfo("${formatDate(max.startedAt)} · " + strings.getString(R.string.equipment_value,
-                    max.equipmentDisplayName ?: strings.getString(R.string.value_none)), colors.muted)
+        if (maxima.isEmpty()) TrainlogInfo(strings.getString(R.string.max_none))
+        maxima.forEach { max ->
+            val weight = "%.2f".format(locale, max.maxWeightKg).trimEnd('0').trimEnd(',', '.')
+            androidx.compose.foundation.layout.Column(
+                Modifier.fillMaxWidth().padding(bottom = 8.dp)
+                    .background(colors.surface, androidx.compose.material3.MaterialTheme.shapes.medium)
+                    .padding(12.dp),
+            ) {
+                androidx.compose.material3.Text(
+                    max.exerciseName,
+                    color = colors.text,
+                    style = com.labfytools.trainlog.ui.theme.TrainlogTypography.section,
+                )
+                androidx.compose.foundation.layout.Row(
+                    Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                ) {
+                    androidx.compose.material3.Text("$weight kg", color = colors.warning)
+                    androidx.compose.material3.Text(formatDate(max.startedAt), color = colors.muted)
+                }
+                max.equipmentDisplayName?.let {
+                    TrainlogInfo(strings.getString(R.string.equipment_value, it), colors.muted)
+                }
             }
         }
     }
@@ -238,17 +434,29 @@ fun EquipmentDetailScreen(repository: TrainlogRepository, equipmentId: String, o
 }
 
 @Composable
-fun EquipmentCreateScreen(repository: TrainlogRepository, state: EquipmentScreenState, onCreated: () -> Unit) {
+fun EquipmentCreateScreen(
+    repository: TrainlogRepository,
+    state: EquipmentScreenState,
+    onCreated: (EquipmentCatalogEntry) -> Unit,
+) {
     val colors = LocalTrainlogColors.current
     val strings = localizedContext()
     TrainlogScreen(strings.getString(R.string.create_equipment), scrollKey = "equipment-create") {
         TrainlogFrame(strings.getString(R.string.personal_equipment)) {
-            TrainlogInputField(strings.getString(R.string.name), state.customName, { state.customName = it; state.message = null })
+            TrainlogInputField(
+                strings.getString(R.string.name),
+                state.customName,
+                { state.customName = it; state.message = null },
+                testTag = "equipment-create-name",
+            )
             TrainlogPrimaryAction(strings.getString(R.string.create), strings.getString(R.string.create_machine_description)) {
                 when (val result = repository.createCustomEquipment(state.customName)) {
                     is CreateEquipmentResult.Created -> {
                         state.selectedEquipmentId = result.equipment.equipmentId
-                        state.customName = ""; state.message = null; state.revision++; onCreated()
+                        state.customName = ""
+                        state.message = null
+                        state.revision++
+                        onCreated(result.equipment)
                     }
                     CreateEquipmentResult.Invalid -> state.message = strings.getString(R.string.equipment_name_invalid)
                     CreateEquipmentResult.Conflict -> state.message = strings.getString(R.string.equipment_name_exists)
@@ -275,13 +483,22 @@ private fun catalogCountsText(context: android.content.Context, imported: Int, r
     ).joinToString(", ")
 
 @Composable
-fun SettingsScreen(inbox: SyncCatalogInbox, onCatalogChanged: () -> Unit) {
+fun SettingsScreen(
+    repository: TrainlogRepository,
+    inbox: SyncCatalogInbox,
+    onHeartRateDiagnostics: () -> Unit,
+    onCatalogChanged: () -> Unit,
+) {
     val colors = LocalTrainlogColors.current
     val context = LocalContext.current
     val language = LocalLanguagePresentation.current
     val strings = localizedContext()
     var authorized by remember { mutableStateOf(inbox.hasFolderAccess()) }
     var message by remember { mutableStateOf<String?>(null) }
+    val heartRatePreferences = remember(context) { HeartRateSensorPreferences(context) }
+    var heartRateRevision by remember { mutableIntStateOf(0) }
+    val selectedHeartRateSensor =
+        remember(heartRateRevision) { heartRatePreferences.selected() }
     val launcher = rememberLauncherForActivityResult(ActivityResultContracts.StartActivityForResult()) {
         authorized = inbox.hasFolderAccess()
         message = strings.getString(if (authorized) R.string.settings_access_granted else R.string.settings_access_required)
@@ -298,6 +515,25 @@ fun SettingsScreen(inbox: SyncCatalogInbox, onCatalogChanged: () -> Unit) {
                 }
         }
     }
+    val backupService = remember { AndroidBackupService(context) }
+    val backupLauncher = rememberLauncherForActivityResult(ActivityResultContracts.CreateDocument("application/zip")) { uri ->
+        if (uri != null) {
+            val result = runCatching { context.contentResolver.openOutputStream(uri, "w")!!.use { backupService.create(repository, it) } }.getOrElse { AndroidBackupResult.Error(it.message ?: "Backup export failed.") }
+            message = strings.getString(if (result is AndroidBackupResult.Success) R.string.settings_backup_complete else R.string.settings_backup_failed)
+        }
+    }
+    val restoreLauncher = rememberLauncherForActivityResult(ActivityResultContracts.OpenDocument()) { uri ->
+        if (uri != null) {
+            val verified = runCatching { context.contentResolver.openInputStream(uri)!!.use { backupService.verify(it).getOrThrow() } }
+            val result = verified.fold({ backupService.restore(repository, it) }, { AndroidBackupResult.Error(it.message ?: "Backup verification failed.") })
+            if (result is AndroidBackupResult.Error) {
+                android.widget.Toast.makeText(context, strings.getString(R.string.settings_restore_failed), android.widget.Toast.LENGTH_LONG).show()
+            }
+            // Restore closes the repository before replacement. Recreate even
+            // after a rolled-back failure so no UI owner retains that handle.
+            (context as? android.app.Activity)?.recreate()
+        }
+    }
     TrainlogScreen(strings.getString(R.string.settings_screen)) {
         TrainlogFrame(strings.getString(R.string.settings_language_section)) {
             TrainlogInfo("${strings.getString(R.string.settings_language_label)} : " +
@@ -317,6 +553,29 @@ fun SettingsScreen(inbox: SyncCatalogInbox, onCatalogChanged: () -> Unit) {
                 )
             }
         }
+        TrainlogFrame(strings.getString(R.string.settings_cardio_section)) {
+            if (selectedHeartRateSensor != null) {
+                TrainlogInfo(
+                    strings.getString(R.string.settings_cardio_configured),
+                    colors.success,
+                )
+            }
+            TrainlogAction(
+                strings.getString(R.string.settings_cardio_diagnostics),
+                strings.getString(R.string.settings_cardio_diagnostics_description),
+                onHeartRateDiagnostics,
+            )
+            if (selectedHeartRateSensor != null) {
+                TrainlogAction(
+                    strings.getString(R.string.settings_cardio_forget),
+                    strings.getString(R.string.settings_cardio_forget_description),
+                    {
+                        HeartRateSensorService.forget(context)
+                        heartRateRevision++
+                    },
+                )
+            }
+        }
         TrainlogFrame(strings.getString(R.string.settings_exchange_folder)) {
             TrainlogInfo(strings.getString(if (authorized) R.string.settings_folder_granted else R.string.settings_folder_required), if (authorized) colors.success else colors.warning)
             TrainlogAction(strings.getString(if (authorized) R.string.settings_open_access else R.string.settings_authorize), strings.getString(R.string.settings_authorize_description), { launcher.launch(directStoragePermissionIntent(context)) })
@@ -331,5 +590,12 @@ fun SettingsScreen(inbox: SyncCatalogInbox, onCatalogChanged: () -> Unit) {
             })
             message?.let { TrainlogInfo(it, if (authorized) colors.success else colors.error) }
         }
+        TrainlogFrame(strings.getString(R.string.settings_backup_section)) {
+            TrainlogInfo(strings.getString(R.string.settings_backup_plaintext))
+            TrainlogAction(strings.getString(R.string.settings_backup_create), strings.getString(R.string.settings_backup_create_description),
+                { backupLauncher.launch("trainlog-backup.tlbackup") })
+            TrainlogAction(strings.getString(R.string.settings_backup_restore), strings.getString(R.string.settings_backup_restore_description),
+                { restoreLauncher.launch(arrayOf("application/zip", "application/octet-stream")) })
+        }
     }
 }

android/app/src/main/java/com/labfytools/trainlog/ui/SessionScreen.kt

@@ -25,9 +25,16 @@ import androidx.compose.foundation.layout.IntrinsicSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.foundation.text.BasicText
 import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.key
 import androidx.compose.runtime.mutableStateOf
@@ -45,14 +52,16 @@ import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.unit.dp
+import com.labfytools.trainlog.BuildConfig
+import com.labfytools.trainlog.R
 import com.labfytools.trainlog.data.ActiveDraftLoadResult
 import com.labfytools.trainlog.data.ActiveDraftMutationResult
-import com.labfytools.trainlog.data.CreateEquipmentResult
 import com.labfytools.trainlog.data.EquipmentLoadSemantics
 import com.labfytools.trainlog.data.FinalizeActiveDraftResult
 import com.labfytools.trainlog.data.ManualPercentMaxResult
 import com.labfytools.trainlog.data.SaveFeedbackResult
 import com.labfytools.trainlog.data.TrainlogRepository
+import com.labfytools.trainlog.data.TrainlogRepository.SessionExerciseTimingResult
 import com.labfytools.trainlog.model.ActiveSessionDraft
 import com.labfytools.trainlog.model.ExerciseDataFields
 import com.labfytools.trainlog.model.ExerciseProfile
@@ -68,7 +77,18 @@ import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
 import com.labfytools.trainlog.ui.theme.TrainlogTypography
 import java.text.Normalizer
 import java.util.Locale
-import com.labfytools.trainlog.R
+
+/**
+ * CONTRACT: a private recovery build may override finalization time for one
+ * exact stable lifecycle identity only. Empty build inputs and every other
+ * draft retain the normal repository clock default.
+ */
+private fun recoveryEndedAt(draft: ActiveSessionDraft): String? =
+    BuildConfig.ACTIVE_SESSION_RECOVERY_ENDED_AT.takeIf {
+        BuildConfig.ACTIVE_SESSION_RECOVERY_ID.isNotEmpty() &&
+            BuildConfig.ACTIVE_SESSION_RECOVERY_ID == draft.sessionId &&
+            it.isNotEmpty()
+    }
 
 @Composable
 fun SessionScreen(
@@ -76,7 +96,10 @@ fun SessionScreen(
     catalogRevision: Int,
     onBack: () -> Unit,
     onCreateExercise: () -> Unit,
+    onCreateEquipment: (editingEntryId: String?) -> Unit,
     onSessionSaved: () -> Unit,
+    restoreEditingEntryId: String? = null,
+    onEditingContextRestored: () -> Unit = {},
 ) {
     val colors =
         LocalTrainlogColors.current
@@ -96,13 +119,27 @@ fun SessionScreen(
 
     var activeDraft by
         remember(catalogRevision) {
+            val loadedDraft = (initialLoad as? ActiveDraftLoadResult.Loaded)?.draft
+            val restoredIndex = restoreEditingEntryId?.let { entryId ->
+                loadedDraft?.exercises?.indexOfFirst { it.entryId == entryId }
+                    ?.takeIf { it >= 0 }
+            }
             mutableStateOf(
-                (initialLoad as?
-                    ActiveDraftLoadResult.Loaded)
-                    ?.draft
+                if (restoredIndex == null) loadedDraft else loadedDraft?.let { draft ->
+                    draft.copy(
+                        form = draft.form.copy(
+                            editingExerciseIndex = restoredIndex,
+                            editingEntryId = restoreEditingEntryId,
+                        ),
+                    )
+                }
             )
         }
 
+    LaunchedEffect(restoreEditingEntryId) {
+        if (restoreEditingEntryId != null) onEditingContextRestored()
+    }
+
     var message by
         remember(catalogRevision) {
             mutableStateOf<
@@ -132,6 +169,9 @@ fun SessionScreen(
     var pendingDestructiveEdit by remember { mutableStateOf<Pair<Int, SessionExerciseDraft>?>(null) }
     var feedbackRevision by remember { mutableStateOf(0) }
     var reorderedDuringGesture by remember { mutableStateOf(false) }
+    var timelineRevision by remember { mutableStateOf(0) }
+    var pendingExerciseSwitch by remember { mutableStateOf<Pair<String, String>?>(null) }
+    var pendingFinalizeActiveEntryId by remember { mutableStateOf<String?>(null) }
 
     val persistDraft:
         (ActiveSessionDraft, String?) -> Unit =
@@ -171,6 +211,12 @@ fun SessionScreen(
         }
 
         val currentDraft = activeDraft!!
+        val exerciseTimings =
+            remember(timelineRevision, currentDraft.exercises.map { it.entryId }) {
+                repository.listActiveSessionExerciseTimings()
+            }
+        val timingByEntry = exerciseTimings.associateBy { it.entryId }
+        val activeTiming = exerciseTimings.firstOrNull { it.active }
 
         val lastWriteFailed =
             message?.startsWith(
@@ -196,69 +242,47 @@ fun SessionScreen(
         TrainlogFrame(
             title = strings.getString(R.string.session_type)
         ) {
-            TrainlogAction(
-                label =
-                    if (
-                        currentDraft.sessionType ==
-                        SessionType.TRAINING
-                    ) {
-                        strings.getString(R.string.training_selected)
-                    } else {
-                        strings.getString(R.string.training_unselected)
-                    },
-                description =
-                    strings.getString(R.string.normal_session_description),
-                accent =
-                    if (
-                        currentDraft.sessionType ==
-                        SessionType.TRAINING
-                    ) {
-                        colors.success
-                    } else {
-                        colors.muted
-                    },
-                onClick = {
+            Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                val training = currentDraft.sessionType == SessionType.TRAINING
+                TrainlogButton(
+                    label = strings.getString(R.string.training),
+                    modifier = Modifier.weight(1f),
+                    style = if (training) TrainlogButtonStyle.SUCCESS else TrainlogButtonStyle.SECONDARY,
+                    maxLines = 2,
+                    onClick = {
                     persistDraft(
-                        currentDraft.copy(
-                            sessionType =
-                                SessionType.TRAINING
-                        ),
+                        currentDraft.copy(sessionType = SessionType.TRAINING),
                         null,
                     )
-                },
-            )
-
-            TrainlogAction(
-                label =
-                    if (
-                        currentDraft.sessionType ==
-                        SessionType.MAX_TEST
-                    ) {
-                        strings.getString(R.string.max_test_selected)
-                    } else {
-                        strings.getString(R.string.max_test_unselected)
                     },
-                description =
-                    strings.getString(R.string.max_session_description),
-                accent =
-                    if (
-                        currentDraft.sessionType ==
-                        SessionType.MAX_TEST
-                    ) {
-                        colors.warning
-                    } else {
-                        colors.muted
-                    },
-                onClick = {
+                )
+                val maxTest = currentDraft.sessionType == SessionType.MAX_TEST
+                TrainlogButton(
+                    label = strings.getString(R.string.session_max_test),
+                    modifier = Modifier.weight(1f),
+                    style = if (maxTest) TrainlogButtonStyle.SUCCESS else TrainlogButtonStyle.SECONDARY,
+                    maxLines = 2,
+                    onClick = {
                     persistDraft(
-                        currentDraft.copy(
-                            sessionType =
-                                SessionType.MAX_TEST
-                        ),
+                        currentDraft.copy(sessionType = SessionType.MAX_TEST),
                         null,
                     )
-                },
-            )
+                    },
+                )
+                val cardio = currentDraft.sessionType == SessionType.CARDIO
+                TrainlogButton(
+                    label = strings.getString(R.string.session_cardio),
+                    modifier = Modifier.weight(1f),
+                    style = if (cardio) TrainlogButtonStyle.SUCCESS else TrainlogButtonStyle.SECONDARY,
+                    maxLines = 2,
+                    onClick = {
+                    persistDraft(
+                        currentDraft.copy(sessionType = SessionType.CARDIO),
+                        null,
+                    )
+                    },
+                )
+            }
         }
 
         ExercisePicker(
@@ -281,23 +305,19 @@ fun SessionScreen(
         ) {
             TrainlogInfo(
                 text =
-                    strings.getString(R.string.session_type_value,
-                        if (
-                            currentDraft.sessionType ==
-                            SessionType.MAX_TEST
-                        ) {
-                            strings.getString(R.string.session_max_test)
-                        } else {
-                            strings.getString(R.string.session_training)
-                        }),
+                    strings.getString(
+                        R.string.session_type_value,
+                        when (currentDraft.sessionType) {
+                            SessionType.TRAINING -> strings.getString(R.string.session_training)
+                            SessionType.MAX_TEST -> strings.getString(R.string.session_max_test)
+                            SessionType.CARDIO -> strings.getString(R.string.session_cardio)
+                        },
+                    ),
                 color =
-                    if (
-                        currentDraft.sessionType ==
-                        SessionType.MAX_TEST
-                    ) {
-                        colors.warning
-                    } else {
-                        colors.accent
+                    when (currentDraft.sessionType) {
+                        SessionType.MAX_TEST -> colors.warning
+                        SessionType.CARDIO -> colors.success
+                        SessionType.TRAINING -> colors.accent
                     },
             )
 
@@ -372,18 +392,110 @@ fun SessionScreen(
                             )
                         }
 
+                        val timing = timingByEntry[draft.entryId]
+                        when {
+                            timing == null -> {
+                                TrainlogButton(
+                                    label = strings.getString(R.string.exercise_timeline_start),
+                                    onClick = {
+                                        when (
+                                            val result =
+                                                repository.startActiveSessionExercise(draft.entryId)
+                                        ) {
+                                            is SessionExerciseTimingResult.Started -> {
+                                                timelineRevision++
+                                                message =
+                                                    strings.getString(
+                                                        R.string.exercise_timeline_started,
+                                                        draft.exercise.name,
+                                                    )
+                                            }
+                                            is SessionExerciseTimingResult.ActiveConflict -> {
+                                                pendingExerciseSwitch =
+                                                    result.activeEntryId to draft.entryId
+                                            }
+                                            is SessionExerciseTimingResult.Invalid ->
+                                                message = result.message
+                                            is SessionExerciseTimingResult.DatabaseError ->
+                                                message = result.message
+                                            is SessionExerciseTimingResult.Finished -> Unit
+                                        }
+                                    },
+                                    modifier =
+                                        Modifier
+                                            .fillMaxWidth()
+                                            .testTag("start-exercise-${draft.entryId}"),
+                                    style = TrainlogButtonStyle.SUCCESS,
+                                )
+                            }
+                            timing.active -> {
+                                TrainlogButton(
+                                    label = strings.getString(R.string.exercise_timeline_finish),
+                                    onClick = {
+                                        when (
+                                            val result =
+                                                repository.finishActiveSessionExercise(draft.entryId)
+                                        ) {
+                                            is SessionExerciseTimingResult.Finished -> {
+                                                timelineRevision++
+                                                message =
+                                                    strings.getString(
+                                                        R.string.exercise_timeline_finished,
+                                                        draft.exercise.name,
+                                                    )
+                                            }
+                                            is SessionExerciseTimingResult.Invalid ->
+                                                message = result.message
+                                            is SessionExerciseTimingResult.DatabaseError ->
+                                                message = result.message
+                                            is SessionExerciseTimingResult.Started,
+                                            is SessionExerciseTimingResult.ActiveConflict -> Unit
+                                        }
+                                    },
+                                    modifier =
+                                        Modifier
+                                            .fillMaxWidth()
+                                            .testTag("finish-exercise-${draft.entryId}"),
+                                    containerColor = colors.warning,
+                                    style = TrainlogButtonStyle.SECONDARY,
+                                )
+                            }
+                            else -> {
+                                TrainlogButton(
+                                    label = strings.getString(R.string.exercise_timeline_completed),
+                                    onClick = {},
+                                    modifier =
+                                        Modifier
+                                            .fillMaxWidth()
+                                            .testTag("completed-exercise-${draft.entryId}"),
+                                    enabled = false,
+                                    style = TrainlogButtonStyle.SECONDARY,
+                                )
+                            }
+                        }
+
+                        if (
+                            currentDraft.sessionType == SessionType.CARDIO &&
+                            timing?.active == true
+                        ) {
+                            CardioGuidancePanel(
+                                repository = repository,
+                                entryId = draft.entryId,
+                            )
+                        }
+
                         TrainlogAction(
                             label = strings.getString(R.string.modify_name, draft.exercise.name),
                             description = strings.getString(R.string.edit_exercise_description),
                             accent = colors.accent,
+                            modifier = Modifier.testTag("edit-draft-exercise-${draft.entryId}"),
                             onClick = {
                                 persistDraft(
                                     currentDraft.copy(
                                         form = formForExistingExercise(draft, index),
                                     ),
-                                    null,
+                                    strings.getString(R.string.editor_opened, draft.exercise.name),
                                 )
-                                message = strings.getString(R.string.editor_opened, draft.exercise.name)
                             },
                         )
                         if (currentDraft.form.editingEntryId == draft.entryId) {
@@ -467,8 +579,11 @@ fun SessionScreen(
                 sessionType = currentDraft.sessionType,
                 initialForm =
                     currentDraft.form,
-                initialPlan = currentDraft.form.editingExerciseIndex?.let {
-                    currentDraft.exercises.getOrNull(it)?.plan
+                initialOccurrence = currentDraft.form.editingExerciseIndex?.let {
+                    currentDraft.exercises.getOrNull(it)
+                },
+                onCreateEquipment = {
+                    onCreateEquipment(currentDraft.form.editingEntryId)
                 },
                 onFormChanged = {
                     form ->
@@ -530,22 +645,32 @@ fun SessionScreen(
                     Modifier.weight(1f).fillMaxHeight().testTag("active-session-create-exercise"),
                     containerColor = colors.surfaceAlt, maxLines = 2)
                 TrainlogButton(strings.getString(R.string.session_save), onClick = {
-                    when (
-                        val result =
-                            repository.finalizeActiveSessionDraft()
-                    ) {
-                        is FinalizeActiveDraftResult.Saved -> {
-                            onSessionSaved()
-                            onBack()
-                        }
+                    val activeEntryId = repository.activeSessionTimelineContext()?.activeEntryId
+                    if (activeEntryId != null) {
+                        pendingFinalizeActiveEntryId = activeEntryId
+                    } else {
+                        when (
+                            val result =
+                                repository.finalizeActiveSessionDraft(
+                                    recoveryEndedAt(currentDraft),
+                                )
+                        ) {
+                            is FinalizeActiveDraftResult.Saved -> {
+                                onSessionSaved()
+                                onBack()
+                            }
 
-                        is FinalizeActiveDraftResult.Invalid -> {
-                            message = localizedRepositoryMessage(strings, result.message)
-                        }
+                            is FinalizeActiveDraftResult.Invalid -> {
+                                message = localizedRepositoryMessage(strings, result.message)
+                            }
 
-                        is FinalizeActiveDraftResult.DatabaseError -> {
-                            message =
-                                strings.getString(R.string.finalize_failed, localizedRepositoryMessage(strings, result.message))
+                            is FinalizeActiveDraftResult.DatabaseError -> {
+                                message =
+                                    strings.getString(
+                                        R.string.finalize_failed,
+                                        localizedRepositoryMessage(strings, result.message),
+                                    )
+                            }
                         }
                     }
                 }, modifier = Modifier.weight(1f).fillMaxHeight().testTag("active-session-save"),
@@ -601,12 +726,24 @@ fun SessionScreen(
                             strings.getString(R.string.exercise_added) ||
                             message ==
                             strings.getString(R.string.exercise_removed) ||
-                            message == strings.getString(R.string.exercise_order_saved)
+                            message == strings.getString(R.string.exercise_order_saved) ||
+                            currentDraft.exercises.any { exercise ->
+                                message ==
+                                    strings.getString(
+                                        R.string.exercise_timeline_started,
+                                        exercise.exercise.name,
+                                    ) ||
+                                    message ==
+                                    strings.getString(
+                                        R.string.exercise_timeline_finished,
+                                        exercise.exercise.name,
+                                    )
+                            }
                         ) {
                             colors.success
                         } else {
                             colors.error
-                        },
+                        }
                 )
             }
         }
@@ -652,6 +789,142 @@ fun SessionScreen(
                 },
             )
         }
+
+        pendingExerciseSwitch?.let { (activeEntryId, targetEntryId) ->
+            val activeName =
+                currentDraft.exercises.firstOrNull { it.entryId == activeEntryId }
+                    ?.exercise?.name
+                    ?: strings.getString(R.string.exercise_title)
+            val targetName =
+                currentDraft.exercises.firstOrNull { it.entryId == targetEntryId }
+                    ?.exercise?.name
+                    ?: strings.getString(R.string.exercise_title)
+            AlertDialog(
+                onDismissRequest = { pendingExerciseSwitch = null },
+                title = { Text(strings.getString(R.string.exercise_timeline_switch_title)) },
+                text = {
+                    Text(
+                        strings.getString(
+                            R.string.exercise_timeline_switch_detail,
+                            activeName,
+                            targetName,
+                        ),
+                    )
+                },
+                confirmButton = {
+                    TextButton(
+                        onClick = {
+                            when (
+                                val finished =
+                                    repository.finishActiveSessionExercise(activeEntryId)
+                            ) {
+                                is SessionExerciseTimingResult.Finished -> {
+                                    when (
+                                        val started =
+                                            repository.startActiveSessionExercise(targetEntryId)
+                                    ) {
+                                        is SessionExerciseTimingResult.Started -> {
+                                            timelineRevision++
+                                            message =
+                                                strings.getString(
+                                                    R.string.exercise_timeline_started,
+                                                    targetName,
+                                                )
+                                        }
+                                        is SessionExerciseTimingResult.Invalid ->
+                                            message = started.message
+                                        is SessionExerciseTimingResult.DatabaseError ->
+                                            message = started.message
+                                        is SessionExerciseTimingResult.ActiveConflict,
+                                        is SessionExerciseTimingResult.Finished -> Unit
+                                    }
+                                }
+                                is SessionExerciseTimingResult.Invalid ->
+                                    message = finished.message
+                                is SessionExerciseTimingResult.DatabaseError ->
+                                    message = finished.message
+                                is SessionExerciseTimingResult.Started,
+                                is SessionExerciseTimingResult.ActiveConflict -> Unit
+                            }
+                            pendingExerciseSwitch = null
+                        },
+                    ) {
+                        Text(strings.getString(R.string.exercise_timeline_switch_confirm))
+                    }
+                },
+                dismissButton = {
+                    TextButton(onClick = { pendingExerciseSwitch = null }) {
+                        Text(strings.getString(R.string.dialog_cancel))
+                    }
+                },
+            )
+        }
+
+        pendingFinalizeActiveEntryId?.let { activeEntryId ->
+            val activeName =
+                currentDraft.exercises.firstOrNull { it.entryId == activeEntryId }
+                    ?.exercise?.name
+                    ?: strings.getString(R.string.exercise_title)
+            AlertDialog(
+                onDismissRequest = { pendingFinalizeActiveEntryId = null },
+                title = { Text(strings.getString(R.string.exercise_timeline_finalize_title)) },
+                text = {
+                    Text(
+                        strings.getString(
+                            R.string.exercise_timeline_finalize_detail,
+                            activeName,
+                        ),
+                    )
+                },
+                confirmButton = {
+                    TextButton(
+                        onClick = {
+                            when (
+                                val finished =
+                                    repository.finishActiveSessionExercise(activeEntryId)
+                            ) {
+                                is SessionExerciseTimingResult.Finished -> {
+                                    timelineRevision++
+                                    when (
+                                        val result = repository.finalizeActiveSessionDraft(
+                                            recoveryEndedAt(currentDraft),
+                                        )
+                                    ) {
+                                        is FinalizeActiveDraftResult.Saved -> {
+                                            pendingFinalizeActiveEntryId = null
+                                            onSessionSaved()
+                                            onBack()
+                                        }
+                                        is FinalizeActiveDraftResult.Invalid ->
+                                            message = localizedRepositoryMessage(strings, result.message)
+                                        is FinalizeActiveDraftResult.DatabaseError ->
+                                            message =
+                                                strings.getString(
+                                                    R.string.finalize_failed,
+                                                    localizedRepositoryMessage(strings, result.message),
+                                                )
+                                    }
+                                }
+                                is SessionExerciseTimingResult.Invalid ->
+                                    message = finished.message
+                                is SessionExerciseTimingResult.DatabaseError ->
+                                    message = finished.message
+                                is SessionExerciseTimingResult.Started,
+                                is SessionExerciseTimingResult.ActiveConflict -> Unit
+                            }
+                            pendingFinalizeActiveEntryId = null
+                        },
+                    ) {
+                        Text(strings.getString(R.string.exercise_timeline_finalize_confirm))
+                    }
+                },
+                dismissButton = {
+                    TextButton(onClick = { pendingFinalizeActiveEntryId = null }) {
+                        Text(strings.getString(R.string.dialog_cancel))
+                    }
+                },
+            )
+        }
     }
 }
 
@@ -894,7 +1167,8 @@ private fun SessionExerciseForm(
     exercise: ExerciseProfile,
     sessionType: SessionType,
     initialForm: SessionDraftForm,
-    initialPlan: SessionExercisePlan?,
+    initialOccurrence: SessionExerciseDraft?,
+    onCreateEquipment: () -> Unit,
     onFormChanged: (SessionDraftForm) -> Unit,
     onCancel: () -> Unit,
     onAdd:
@@ -904,6 +1178,7 @@ private fun SessionExerciseForm(
     val colors =
         LocalTrainlogColors.current
     val strings = localizedContext()
+    val initialPlan = initialOccurrence?.plan
 
     var setCountText by
         remember(key) {
@@ -969,13 +1244,11 @@ private fun SessionExerciseForm(
             )
         }
 
-    var equipmentRevision by remember(key) { mutableStateOf(0) }
-    val equipmentEntries = remember(equipmentRevision) { repository.listEquipment() }
+    val equipmentEntries = remember(key) { repository.listEquipment() }
     val fixedEquipmentId = remember(exercise.exerciseId) {
         repository.machineExerciseLegacyEquipmentId(exercise.exerciseId)
     }
     var equipmentSearch by remember(key) { mutableStateOf("") }
-    var customEquipmentName by remember(key) { mutableStateOf("") }
     var selectedEquipmentId by remember(key) {
         mutableStateOf(initialForm.selectedEquipmentId ?: fixedEquipmentId)
     }
@@ -1012,34 +1285,18 @@ private fun SessionExerciseForm(
                 value = equipmentSearch,
                 onValueChange = { equipmentSearch = it },
             )
-            TrainlogInputField(
-                label = strings.getString(R.string.new_historical_context),
-                value = customEquipmentName,
-                onValueChange = { customEquipmentName = it },
-            )
             TrainlogAction(
-                label = strings.getString(R.string.create_context),
-                description = strings.getString(R.string.context_compatibility),
+                label = strings.getString(R.string.create_equipment),
+                description = strings.getString(R.string.create_equipment_from_session),
                 accent = colors.success,
-                onClick = {
-                    when (val result = repository.createCustomEquipment(customEquipmentName)) {
-                        is CreateEquipmentResult.Created -> {
-                            customEquipmentName = ""
-                            equipmentRevision += 1
-                            selectedEquipmentId = result.equipment.equipmentId
-                            onFormChanged(currentForm(exercise, setCountText, repsText, durationText, speedText, distanceText, selectedEquipmentId, weightText, maxWeightText))
-                        }
-                        CreateEquipmentResult.Invalid -> error = strings.getString(R.string.context_name_invalid)
-                        CreateEquipmentResult.Conflict -> error = strings.getString(R.string.context_exists)
-                        is CreateEquipmentResult.DatabaseError -> error = strings.getString(R.string.context_create_error, localizedRepositoryMessage(strings, result.message))
-                    }
-                },
+                modifier = Modifier.testTag("session-create-equipment"),
+                onClick = onCreateEquipment,
             )
         }
         val selectedEquipment = equipmentEntries.firstOrNull { it.equipmentId == selectedEquipmentId }
         val percentResult = remember(
             exercise.exerciseId, selectedEquipmentId, targetPercentText,
-            targetChoice, equipmentRevision,
+            targetChoice,
         ) {
             if (targetChoice == ManualTargetChoice.PERCENT_MAX)
                 repository.calculateManualPercentMaxTarget(
@@ -1059,16 +1316,29 @@ private fun SessionExerciseForm(
                 },
             )
         }
-        if (fixedEquipmentId == null) repository.searchEquipment(equipmentSearch).take(8).forEach { equipment ->
-            TrainlogAction(
-                label = if (equipment.equipmentId == selectedEquipmentId) "✓ ${equipment.displayName}" else equipment.displayName,
-                description = equipment.labelName.ifBlank { equipment.type },
-                accent = if (equipment.equipmentId == selectedEquipmentId) colors.success else colors.muted,
-                onClick = {
-                    selectedEquipmentId = equipment.equipmentId
-                    onFormChanged(currentForm(exercise, setCountText, repsText, durationText, speedText, distanceText, equipment.equipmentId, weightText, maxWeightText))
-                },
-            )
+        if (fixedEquipmentId == null) {
+            /* WHY: alphabetical truncation made valid equipment beyond the
+             * eighth row impossible to select. CONTRACT: the bounded nested
+             * viewport exposes every search result while the surrounding
+             * exercise editor remains independently scrollable. */
+            Column(
+                Modifier
+                    .heightIn(max = 320.dp)
+                    .verticalScroll(rememberScrollState())
+                    .testTag("session-equipment-results"),
+            ) {
+                repository.searchEquipment(equipmentSearch).forEach { equipment ->
+                    TrainlogAction(
+                        label = if (equipment.equipmentId == selectedEquipmentId) "✓ ${equipment.displayName}" else equipment.displayName,
+                        description = equipment.labelName.ifBlank { equipment.type },
+                        accent = if (equipment.equipmentId == selectedEquipmentId) colors.success else colors.muted,
+                        onClick = {
+                            selectedEquipmentId = equipment.equipmentId
+                            onFormChanged(currentForm(exercise, setCountText, repsText, durationText, speedText, distanceText, equipment.equipmentId, weightText, maxWeightText))
+                        },
+                    )
+                }
+            }
         }
 
         if (sessionType == SessionType.MAX_TEST) {
@@ -1151,54 +1421,78 @@ private fun SessionExerciseForm(
                         strings.getString(R.string.field_weight)
                     }
                 setRows.forEachIndexed { index, row ->
-                    TrainlogInfo(
-                        text = strings.getString(R.string.set_number, index + 1),
-                        color = colors.accent,
-                    )
-                    SessionNumberField(
-                        label = strings.getString(R.string.set_reps_field, index + 1),
-                        value = row.repsText,
-                        testTag = "session-set-$index-reps",
-                        onValueChange = { value ->
-                            val updated = setRows.replaceAt(index, row.copy(repsText = value))
-                            setRows = updated
-                            repsText = encodeRawReps(updated)
-                            weightText = encodeRawWeights(updated)
-                            error = null
-                            onFormChanged(
-                                currentForm(
-                                    exercise, setCountText, repsText, durationText,
-                                    speedText, distanceText, selectedEquipmentId, weightText,
-                                )
+                    Column(
+                        Modifier
+                            .fillMaxWidth()
+                            .padding(bottom = 8.dp)
+                            .background(colors.surface, MaterialTheme.shapes.medium)
+                            .padding(10.dp),
+                    ) {
+                        Row(
+                            Modifier.fillMaxWidth(),
+                            horizontalArrangement = Arrangement.SpaceBetween,
+                        ) {
+                            BasicText(
+                                text = strings.getString(R.string.set_number, index + 1),
+                                modifier = Modifier.padding(vertical = 12.dp),
+                                style = TrainlogTypography.small.copy(
+                                    color = colors.accent,
+                                    fontWeight = FontWeight.Bold,
+                                ),
                             )
-                        },
-                    )
-                    SessionNumberField(
-                        label = strings.getString(R.string.set_load_field, index + 1, loadLabel),
-                        value = row.weightText,
-                        decimal = true,
-                        testTag = "session-set-$index-weight",
-                        onValueChange = { value ->
-                            val updated = setRows.replaceAt(index, row.copy(weightText = value))
-                            setRows = updated
-                            repsText = encodeRawReps(updated)
-                            weightText = encodeRawWeights(updated)
-                            error = null
-                            onFormChanged(
-                                currentForm(
-                                    exercise, setCountText, repsText, durationText,
-                                    speedText, distanceText, selectedEquipmentId, weightText,
-                                )
+                            TrainlogIconAction(
+                                icon = TrainlogIcons.DeleteOutline,
+                                contentDescription = localizedContext().getString(R.string.a11y_delete_set),
+                                modifier = Modifier.testTag("delete-set-${index + 1}"),
+                                accent = colors.error,
+                                onClick = { pendingSetRemoval = index },
                             )
-                        },
-                    )
-                    TrainlogDeleteButton(
-                        contentDescription = localizedContext().getString(com.labfytools.trainlog.R.string.a11y_delete_set),
-                        modifier = Modifier.testTag("delete-set-${index + 1}"),
-                        onClick = {
-                            pendingSetRemoval = index
-                        },
-                    )
+                        }
+                        Row(
+                            Modifier.fillMaxWidth(),
+                            horizontalArrangement = Arrangement.spacedBy(8.dp),
+                        ) {
+                            SessionNumberField(
+                                label = strings.getString(R.string.field_reps),
+                                value = row.repsText,
+                                modifier = Modifier.weight(1f),
+                                testTag = "session-set-$index-reps",
+                                onValueChange = { value ->
+                                    val updated = setRows.replaceAt(index, row.copy(repsText = value))
+                                    setRows = updated
+                                    repsText = encodeRawReps(updated)
+                                    weightText = encodeRawWeights(updated)
+                                    error = null
+                                    onFormChanged(
+                                        currentForm(
+                                            exercise, setCountText, repsText, durationText,
+                                            speedText, distanceText, selectedEquipmentId, weightText,
+                                        )
+                                    )
+                                },
+                            )
+                            SessionNumberField(
+                                label = loadLabel,
+                                value = row.weightText,
+                                modifier = Modifier.weight(1f),
+                                decimal = true,
+                                testTag = "session-set-$index-weight",
+                                onValueChange = { value ->
+                                    val updated = setRows.replaceAt(index, row.copy(weightText = value))
+                                    setRows = updated
+                                    repsText = encodeRawReps(updated)
+                                    weightText = encodeRawWeights(updated)
+                                    error = null
+                                    onFormChanged(
+                                        currentForm(
+                                            exercise, setCountText, repsText, durationText,
+                                            speedText, distanceText, selectedEquipmentId, weightText,
+                                        )
+                                    )
+                                },
+                            )
+                        }
+                    }
                 }
                 TrainlogAction(
                     label = strings.getString(R.string.add_set_plain),
@@ -1275,6 +1569,7 @@ private fun SessionExerciseForm(
             SessionNumberField(
                 label =
                     strings.getString(R.string.duration_minutes),
+                testTag = "session-continuous-duration",
                 value =
                     durationText,
                 onValueChange = {
@@ -1361,7 +1656,7 @@ private fun SessionExerciseForm(
             modifier = Modifier.fillMaxWidth().testTag("add-to-session"),
             containerColor = colors.success,
             onClick = {
-                val draft =
+                val capturedDraft =
                     buildSessionExerciseDraft(
                         exercise =
                             exercise,
@@ -1383,6 +1678,26 @@ private fun SessionExerciseForm(
                         rawSetRows = setRows,
                     )
 
+                /* WHY: a prepared occurrence may legitimately have a target
+                 * but no performed sets yet. CONTRACT: changing its equipment
+                 * edits planning metadata in place without fabricating actual
+                 * work. INVARIANT: any nonblank partial performed row still
+                 * follows normal validation and can never be discarded here. */
+                val targetOnlyDraft = initialOccurrence?.takeIf {
+                    sessionType == SessionType.TRAINING &&
+                        it.plan != null &&
+                        it.sets.isEmpty() &&
+                        it.maxWeightKg == null &&
+                        it.continuousDurationSeconds == 0 &&
+                        setRows.all { row ->
+                            row.repsText.isBlank() && row.weightText.isBlank()
+                        }
+                }?.copy(
+                    exercise = exercise,
+                    equipmentId = selectedEquipmentId,
+                )
+                val draft = capturedDraft ?: targetOnlyDraft
+
                 if (draft == null) {
                     error =
                         if (sessionType == SessionType.MAX_TEST) {
@@ -1406,7 +1721,9 @@ private fun SessionExerciseForm(
                         onFailure = { error = localizedTargetError(it.message, strings) },
                     )
                 } else {
-                    onAdd(draft.copy(plan = null))
+                    /* CONTRACT: editing performed continuous facts must not
+                     * erase the independent target copied from preparation. */
+                    onAdd(draft.copy(plan = initialPlan))
                 }
             },
         )
@@ -1418,6 +1735,7 @@ private fun SessionExerciseForm(
                 strings.getString(R.string.return_catalog),
             accent =
                 colors.muted,
+            modifier = Modifier.testTag("cancel-session-exercise-editor"),
             onClick =
                 onCancel,
         )
@@ -1608,6 +1926,7 @@ private fun SessionNumberField(
     label: String,
     value: String,
     onValueChange: (String) -> Unit,
+    modifier: Modifier = Modifier,
     testTag: String? = null,
     decimal: Boolean = false,
 ) {
@@ -1623,6 +1942,7 @@ private fun SessionNumberField(
         } else {
             KeyboardOptions(keyboardType = KeyboardType.Number)
         },
+        modifier = modifier,
     )
 }
 

android/app/src/main/java/com/labfytools/trainlog/ui/SleepDiaryScreen.kt

@@ -0,0 +1,537 @@
+package com.labfytools.trainlog.ui
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import kotlinx.coroutines.delay
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import com.labfytools.trainlog.R
+import com.labfytools.trainlog.data.TrainlogRepository
+import com.labfytools.trainlog.model.SleepDiaryDraft
+import com.labfytools.trainlog.model.SleepDiaryEntry
+import com.labfytools.trainlog.model.SleepDiaryEvent
+import com.labfytools.trainlog.model.SleepEventType
+import com.labfytools.trainlog.model.SleepQuality
+import com.labfytools.trainlog.model.SleepPublicationStatus
+import com.labfytools.trainlog.model.MedicationIntake
+import com.labfytools.trainlog.model.SleepMedication
+import java.time.LocalDate
+import java.time.OffsetDateTime
+import java.util.UUID
+
+
+@Composable
+fun SleepDiaryScreen(repository: TrainlogRepository) {
+    var correctionMode by remember { mutableStateOf(false) }
+    if (correctionMode) {
+        Column(Modifier.fillMaxSize()) {
+            Button(
+                onClick = { correctionMode = false },
+                modifier = Modifier.fillMaxWidth().padding(12.dp),
+            ) {
+                Text(stringResource(R.string.sleep_return_night_mode))
+            }
+            SleepDiaryEditorScreen(repository)
+        }
+    } else {
+        SleepNightCaptureScreen(repository) { correctionMode = true }
+    }
+}
+
+@Composable
+private fun SleepNightCaptureScreen(
+    repository: TrainlogRepository,
+    onCorrection: () -> Unit,
+) {
+    var revision by remember { mutableStateOf(0) }
+    var undoReceipt by remember {
+        mutableStateOf<TrainlogRepository.SleepQuickActionReceipt?>(null)
+    }
+    var message by remember { mutableStateOf<String?>(null) }
+    val strings = localizedContext()
+    val entries = remember(revision) { repository.listSleepDiary() }
+    val active =
+        entries.firstOrNull { entry ->
+            entry.events.any { it.type == SleepEventType.BED_TIME } &&
+                entry.events.none { it.type == SleepEventType.FINAL_GET_UP }
+        }
+    val pending =
+        entries.firstOrNull { entry ->
+            entry.events.none { it.type == SleepEventType.BED_TIME } &&
+                entry.events.none { it.type == SleepEventType.FINAL_GET_UP }
+        }
+    val visibleNight = active ?: pending
+    val medications =
+        remember(revision) {
+            repository.listSleepMedications(includeInactive = false)
+        }
+
+    LaunchedEffect(undoReceipt?.appliedRevisionId) {
+        if (undoReceipt != null) {
+            delay(10_000)
+            undoReceipt = null
+        }
+    }
+
+    fun apply(
+        successMessage: String,
+        result: TrainlogRepository.SleepQuickActionResult,
+    ) {
+        when (result) {
+            is TrainlogRepository.SleepQuickActionResult.Applied -> {
+                undoReceipt = result.receipt
+                message = successMessage
+                revision++
+            }
+            TrainlogRepository.SleepQuickActionResult.NoActiveNight ->
+                message = strings.getString(R.string.sleep_quick_no_active)
+            TrainlogRepository.SleepQuickActionResult.AlreadyActive ->
+                message = strings.getString(R.string.sleep_quick_already_active)
+            TrainlogRepository.SleepQuickActionResult.InvalidMedication ->
+                message = strings.getString(R.string.sleep_quick_medication_unavailable)
+            TrainlogRepository.SleepQuickActionResult.Conflict ->
+                message = strings.getString(R.string.sleep_quick_conflict)
+            TrainlogRepository.SleepQuickActionResult.Error ->
+                message = strings.getString(R.string.sleep_quick_error)
+        }
+    }
+
+    LazyColumn(
+        modifier = Modifier.fillMaxSize().padding(12.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp),
+    ) {
+        item {
+            Text(stringResource(R.string.sleep_night_capture_title))
+        }
+        item {
+            visibleNight?.let { night ->
+                Text(
+                    stringResource(
+                        R.string.sleep_night_in_progress,
+                        night.nightStartDate,
+                        night.nightEndDate,
+                    ),
+                )
+            } ?: Text(stringResource(R.string.sleep_no_night_active))
+        }
+        item {
+            Button(
+                onClick = {
+                    apply(
+                        strings.getString(R.string.sleep_bed_recorded),
+                        repository.quickSleepBedTime(),
+                    )
+                },
+                enabled = active == null,
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Text(stringResource(R.string.sleep_quick_bed))
+            }
+        }
+        if (medications.isNotEmpty()) {
+            item { Text(stringResource(R.string.sleep_medications)) }
+            items(medications, key = { it.medicationId }) { medication ->
+                var quantity by remember(medication.medicationId) { mutableStateOf(1) }
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                ) {
+                    Button(onClick = { if (quantity > 1) quantity-- }) { Text("−") }
+                    Text("×$quantity", modifier = Modifier.padding(top = 12.dp))
+                    Button(onClick = { if (quantity < 99) quantity++ }) { Text("+") }
+                    Button(
+                        onClick = {
+                            val selectedQuantity = quantity
+                            val result =
+                                repository.quickSleepMedication(
+                                    medication.medicationId,
+                                    quantity = selectedQuantity,
+                                )
+                            apply(
+                                strings.getString(
+                                    R.string.sleep_medication_recorded,
+                                    medication.name +
+                                        if (selectedQuantity > 1) " ×$selectedQuantity" else "",
+                                ),
+                                result,
+                            )
+                            if (result is TrainlogRepository.SleepQuickActionResult.Applied) {
+                                quantity = 1
+                            }
+                        },
+                        modifier = Modifier.weight(1f),
+                    ) {
+                        val dose =
+                            medication.defaultDoseValue?.let { doseValue ->
+                                " · " + doseValue.toString().trimEnd('0').trimEnd('.') +
+                                    " " + medication.defaultDoseUnit.orEmpty()
+                            }.orEmpty()
+                        Text("💊 " + medication.name + dose)
+                    }
+                }
+            }
+        }
+        item {
+            Button(
+                onClick = {
+                    apply(
+                        strings.getString(R.string.sleep_wake_recorded),
+                        repository.quickSleepWake(),
+                    )
+                },
+                enabled = active != null,
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Text(stringResource(R.string.sleep_quick_wake))
+            }
+        }
+        item {
+            Button(
+                onClick = {
+                    apply(
+                        strings.getString(R.string.sleep_get_up_recorded),
+                        repository.quickSleepFinalGetUp(),
+                    )
+                },
+                enabled = active != null,
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Text(stringResource(R.string.sleep_quick_get_up))
+            }
+        }
+        message?.let { text ->
+            item {
+                Card {
+                    Column(
+                        Modifier.fillMaxWidth().padding(12.dp),
+                        verticalArrangement = Arrangement.spacedBy(8.dp),
+                    ) {
+                        Text(text)
+                        undoReceipt?.let { receipt ->
+                            Button(
+                                onClick = {
+                                    when (repository.undoSleepQuickAction(receipt)) {
+                                        is TrainlogRepository.SleepQuickActionResult.Applied -> {
+                                            message = strings.getString(R.string.sleep_action_undone)
+                                            undoReceipt = null
+                                            revision++
+                                        }
+                                        else -> {
+                                            message = strings.getString(R.string.sleep_undo_unavailable)
+                                            undoReceipt = null
+                                            revision++
+                                        }
+                                    }
+                                },
+                            ) {
+                                Text(stringResource(R.string.sleep_undo))
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        visibleNight?.let { night ->
+            item {
+                Card {
+                    Column(
+                        Modifier.fillMaxWidth().padding(12.dp),
+                        verticalArrangement = Arrangement.spacedBy(5.dp),
+                    ) {
+                        Text(stringResource(R.string.sleep_night_timeline))
+                        night.events.sortedBy { it.startAt }.forEach { event ->
+                            Text(eventLabelPlain(event.type, strings) + " · " + shortTime(event.startAt))
+                        }
+                        night.intakes.sortedBy { it.takenAt }.forEach { intake ->
+                            Text(
+                                "💊 " + intake.medicationName +
+                                    (if (intake.quantity > 1) " ×${intake.quantity}" else "") +
+                                    " · " + shortTime(intake.takenAt),
+                            )
+                        }
+                    }
+                }
+            }
+        }
+        item {
+            Button(
+                onClick = onCorrection,
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Text(stringResource(R.string.sleep_correct_night))
+            }
+        }
+    }
+}
+
+private fun shortTime(value: String): String =
+    runCatching { OffsetDateTime.parse(value).toLocalTime().withSecond(0).withNano(0).toString() }
+        .getOrDefault(value)
+
+private fun eventLabelPlain(type: SleepEventType, context: android.content.Context): String =
+    context.getString(
+        when (type) {
+            SleepEventType.BED_TIME -> R.string.sleep_bed_time
+            SleepEventType.FINAL_GET_UP -> R.string.sleep_final_get_up
+            SleepEventType.NIGHT_GET_UP -> R.string.sleep_night_get_up
+            SleepEventType.SLEEP -> R.string.sleep_sleep
+            SleepEventType.NAP -> R.string.sleep_nap
+            SleepEventType.LONG_AWAKE -> R.string.sleep_long_awake
+            SleepEventType.HALF_SLEEP -> R.string.sleep_half_sleep
+            SleepEventType.DAYTIME_SLEEPINESS -> R.string.sleep_sleepiness
+        },
+    )
+
+@Composable
+private fun SleepDiaryEditorScreen(repository: TrainlogRepository) {
+    var revision by remember { mutableStateOf(0) }
+    var selected by remember(revision) { mutableStateOf<SleepDiaryEntry?>(repository.listSleepDiary().firstOrNull()) }
+    val today = LocalDate.now()
+    var startDate by remember(selected) { mutableStateOf(selected?.nightStartDate ?: today.minusDays(1).toString()) }
+    var endDate by remember(selected) { mutableStateOf(selected?.nightEndDate ?: today.toString()) }
+    var sleepQuality by remember(selected) { mutableStateOf(selected?.sleepQuality) }
+    var wakeQuality by remember(selected) { mutableStateOf(selected?.wakeQuality) }
+    var dayForm by remember(selected) { mutableStateOf(selected?.dayForm) }
+    var notes by remember(selected) { mutableStateOf(selected?.treatmentAndNotes.orEmpty()) }
+    var events by remember(selected) { mutableStateOf(selected?.events.orEmpty()) }
+    var intakes by remember(selected) { mutableStateOf(selected?.intakes.orEmpty()) }
+    val catalog = remember(revision) { repository.listSleepMedications() }
+    val medications = catalog.filter { it.active }
+    var intakeMedication by remember(medications) { mutableStateOf(medications.firstOrNull()) }
+    var intakeDose by remember(intakeMedication) { mutableStateOf(intakeMedication?.defaultDoseValue?.toString().orEmpty()) }
+    var intakeUnit by remember(intakeMedication) { mutableStateOf(intakeMedication?.defaultDoseUnit.orEmpty()) }
+    var medicationName by remember { mutableStateOf("") }
+    var medicationDose by remember { mutableStateOf("") }
+    var medicationUnit by remember { mutableStateOf("mg") }
+    var editingMedication by remember { mutableStateOf<SleepMedication?>(null) }
+    var editSerial by remember { mutableStateOf(0) }
+    val entries = repository.listSleepDiary()
+    fun changed() { editSerial++ }
+
+    LaunchedEffect(editSerial) {
+        if (editSerial > 0) {
+            val now = OffsetDateTime.now().toString()
+            val current = selected
+            val result = repository.saveSleepDiary(SleepDiaryDraft(current?.entryId,
+                current?.revisionId,startDate,endDate,current?.createdAt ?: now,now,sleepQuality,
+                wakeQuality,dayForm,notes,events,intakes))
+            if (result is TrainlogRepository.SaveSleepDiaryResult.Saved) {
+                selected = repository.listSleepDiary().firstOrNull { it.entryId == result.entryId }
+            }
+        }
+    }
+
+    LazyColumn(
+        modifier = Modifier.fillMaxSize().padding(12.dp),
+        verticalArrangement = Arrangement.spacedBy(10.dp),
+    ) {
+        item { Text(stringResource(R.string.sleep_current_night)) }
+        items(entries, key = { it.entryId }) { entry ->
+            Card(onClick = { selected = entry }) {
+                Column(Modifier.fillMaxWidth().padding(12.dp)) {
+                    Text("${entry.nightStartDate} → ${entry.nightEndDate}")
+                    Text(stringResource(when (entry.publicationStatus) {
+                        SleepPublicationStatus.DRAFT -> R.string.sleep_status_draft
+                        SleepPublicationStatus.READY -> R.string.sleep_status_ready
+                        SleepPublicationStatus.SYNCHRONIZED -> R.string.sleep_status_synchronized
+                        SleepPublicationStatus.MODIFIED -> R.string.sleep_status_modified
+                    }))
+                    Text("${entry.events.size} · ${entry.sleepQuality?.wireValue ?: "—"} / ${entry.wakeQuality?.wireValue ?: "—"}")
+                }
+            }
+        }
+        item {
+            Card {
+                Column(Modifier.fillMaxWidth().padding(12.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Text(stringResource(R.string.sleep_morning))
+                    Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                        OutlinedTextField(startDate, { startDate = it; changed() }, label = { Text("YYYY-MM-DD") }, modifier = Modifier.weight(1f))
+                        OutlinedTextField(endDate, { endDate = it; changed() }, label = { Text("YYYY-MM-DD") }, modifier = Modifier.weight(1f))
+                    }
+                    QualityRow(stringResource(R.string.sleep_quality), sleepQuality) { sleepQuality = it; changed() }
+                    QualityRow(stringResource(R.string.sleep_wake_quality), wakeQuality) { wakeQuality = it; changed() }
+                    Text(stringResource(R.string.sleep_day))
+                    QualityRow(stringResource(R.string.sleep_day_form), dayForm) { dayForm = it; changed() }
+                    SleepEventType.entries.forEach { type ->
+                        Button(onClick = {
+                            val start = OffsetDateTime.now()
+                            events = events + SleepDiaryEvent("sle_${UUID.randomUUID()}", type, start.toString(),
+                                if (type in pointTypes) null else start.plusHours(1).toString())
+                            changed()
+                        }) { Text(eventLabel(type)) }
+                    }
+                    events.forEachIndexed { index, event ->
+                        Card {
+                            Column(Modifier.padding(8.dp)) {
+                                Text(eventLabel(event.type))
+                                TimeButton(event.startAt) { value ->
+                                    events = events.mapIndexed { item, current ->
+                                        if (item == index) current.copy(startAt = value) else current
+                                    }
+                                    changed()
+                                }
+                                OutlinedTextField(event.startAt, { value -> events = events.mapIndexed { item, current -> if (item == index) current.copy(startAt = value) else current }; changed() }, label = { Text("ISO-8601") })
+                                event.endAt?.let { end ->
+                                    TimeButton(end) { value ->
+                                        events = events.mapIndexed { item, current ->
+                                            if (item == index) current.copy(endAt = value) else current
+                                        }
+                                        changed()
+                                    }
+                                    OutlinedTextField(end, { value -> events = events.mapIndexed { item, current -> if (item == index) current.copy(endAt = value) else current }; changed() }, label = { Text("ISO-8601 →") })
+                                }
+                                Button(onClick = { events = events.filterIndexed { item, _ -> item != index }; changed() }) { Text(stringResource(R.string.sleep_delete)) }
+                            }
+                        }
+                    }
+                    Text(stringResource(R.string.sleep_medications))
+                    OutlinedTextField(medicationName, { medicationName = it },
+                        label = { Text(stringResource(R.string.sleep_medications)) }, modifier = Modifier.fillMaxWidth())
+                    Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                        OutlinedTextField(medicationDose, { medicationDose = it },
+                            label = { Text(stringResource(R.string.sleep_dose)) }, modifier = Modifier.weight(1f))
+                        OutlinedTextField(medicationUnit, { medicationUnit = it },
+                            label = { Text(stringResource(R.string.sleep_unit)) }, modifier = Modifier.weight(1f))
+                    }
+                    Button(onClick = {
+                        val now = OffsetDateTime.now().toString()
+                        val dose = medicationDose.toDoubleOrNull()
+                        if (medicationName.isNotBlank() && (medicationDose.isEmpty() || dose != null && dose > 0.0)) {
+                            val current = editingMedication
+                            repository.saveSleepMedication(SleepMedication(current?.medicationId.orEmpty(),
+                                current?.revisionId.orEmpty(), current?.createdAt ?: now, now,
+                                medicationName.trim(), dose, if (dose == null) null else medicationUnit,
+                                current?.form.orEmpty(), current?.note.orEmpty(), current?.active ?: true))
+                            medicationName = ""; editingMedication = null; revision++
+                        }
+                    }) { Text(stringResource(R.string.sleep_add_medication)) }
+                    medications.forEach { medication ->
+                        Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                            FilterChip(selected = intakeMedication?.medicationId == medication.medicationId,
+                                onClick = { intakeMedication = medication
+                                    intakeDose = medication.defaultDoseValue?.toString().orEmpty()
+                                    intakeUnit = medication.defaultDoseUnit.orEmpty() },
+                                label = { Text(medication.name) })
+                            Button(onClick = { editingMedication = medication; medicationName = medication.name
+                                medicationDose = medication.defaultDoseValue?.toString().orEmpty()
+                                medicationUnit = medication.defaultDoseUnit.orEmpty() }) {
+                                Text(stringResource(R.string.sleep_edit))
+                            }
+                            Button(onClick = { repository.saveSleepMedication(medication.copy(
+                                updatedAt = OffsetDateTime.now().toString(), active = false)); revision++ }) {
+                                Text(stringResource(R.string.sleep_deactivate))
+                            }
+                        }
+                    }
+                    Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                        OutlinedTextField(intakeDose, { intakeDose = it },
+                            label = { Text(stringResource(R.string.sleep_dose)) }, modifier = Modifier.weight(1f))
+                        OutlinedTextField(intakeUnit, { intakeUnit = it },
+                            label = { Text(stringResource(R.string.sleep_unit)) }, modifier = Modifier.weight(1f))
+                    }
+                    Button(onClick = {
+                        intakeMedication?.let { medication ->
+                            val dose = intakeDose.toDoubleOrNull()
+                            if (intakeDose.isEmpty() || dose != null && dose > 0.0) {
+                                val now = OffsetDateTime.now().toString()
+                                intakes = intakes + MedicationIntake("mdi_${UUID.randomUUID()}", medication.medicationId,
+                                    medication.name, now, dose, if (dose == null) null else intakeUnit,
+                                    "", now)
+                                changed()
+                            }
+                        }
+                    }) { Text(stringResource(R.string.sleep_add_intake)) }
+                    intakes.forEachIndexed { index, intake -> Card {
+                        Column(Modifier.fillMaxWidth().padding(8.dp), verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                            Text(intake.medicationName)
+                            TimeButton(intake.takenAt) { value -> intakes = intakes.mapIndexed { item, current ->
+                                if (item == index) current.copy(takenAt = value) else current }; changed() }
+                            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                                OutlinedTextField(intake.doseValue?.toString().orEmpty(), { value ->
+                                    intakes = intakes.mapIndexed { item, current -> if (item == index) current.copy(
+                                        doseValue = value.toDoubleOrNull(), doseUnit = if (value.isEmpty()) null else current.doseUnit ?: "mg") else current }
+                                    changed()
+                                }, label = { Text(stringResource(R.string.sleep_dose)) }, modifier = Modifier.weight(1f))
+                                OutlinedTextField(intake.doseUnit.orEmpty(), { value -> intakes = intakes.mapIndexed { item, current ->
+                                    if (item == index) current.copy(doseUnit = value) else current }
+                                    changed()
+                                }, label = { Text(stringResource(R.string.sleep_unit)) }, modifier = Modifier.weight(1f))
+                            }
+                            Button(onClick = { intakes = intakes.filterIndexed { item, _ -> item != index }; changed() }) {
+                                Text(stringResource(R.string.sleep_delete))
+                            }
+                        }
+                    } }
+                    OutlinedTextField(notes, { notes = it; changed() }, label = { Text(stringResource(R.string.sleep_notes)) }, modifier = Modifier.fillMaxWidth(), minLines = 3)
+                    Button(onClick = {
+                        val now = OffsetDateTime.now().toString()
+                        val current = selected
+                        val result = repository.saveSleepDiary(SleepDiaryDraft(current?.entryId,current?.revisionId,startDate,endDate,current?.createdAt ?: now,now,sleepQuality,wakeQuality,dayForm,notes,events,intakes))
+                        if (result is TrainlogRepository.SaveSleepDiaryResult.Saved) { revision++; selected = repository.listSleepDiary().firstOrNull { it.entryId == result.entryId } }
+                    }) { Text(stringResource(R.string.sleep_save)) }
+                    selected?.let { entry -> Button(onClick = {
+                        repository.validateSleepDiary(entry.entryId, entry.revisionId,
+                            OffsetDateTime.now().toString())
+                        selected = repository.listSleepDiary().firstOrNull { it.entryId == entry.entryId }
+                    }) { Text(stringResource(R.string.sleep_validate)) } }
+                    selected?.let { entry -> Button(onClick = { repository.deleteSleepDiary(entry.entryId,entry.revisionId,OffsetDateTime.now().toString()); selected = null; revision++ }) { Text(stringResource(R.string.sleep_delete)) } }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun TimeButton(value: String, change: (String) -> Unit) {
+    val context = LocalContext.current
+    val parsed = runCatching { OffsetDateTime.parse(value) }.getOrNull()
+    Button(onClick = {
+        val current = parsed ?: OffsetDateTime.now()
+        android.app.TimePickerDialog(context, { _, hour, minute ->
+            change(current.withHour(hour).withMinute(minute).withSecond(0).withNano(0).toString())
+        }, current.hour, current.minute, true).show()
+    }) {
+        Text(stringResource(R.string.sleep_choose_time) + " " + (parsed?.toLocalTime()?.toString() ?: "—"))
+    }
+}
+
+private val pointTypes = setOf(SleepEventType.BED_TIME, SleepEventType.FINAL_GET_UP,
+    SleepEventType.NIGHT_GET_UP, SleepEventType.DAYTIME_SLEEPINESS)
+
+@Composable
+private fun QualityRow(label: String, selected: SleepQuality?, change: (SleepQuality?) -> Unit) {
+    Column { Text(label); Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+        SleepQuality.entries.forEach { value -> FilterChip(selected == value, { change(if (selected == value) null else value) }, { Text(value.wireValue) }) }
+    } }
+}
+
+@Composable
+private fun eventLabel(type: SleepEventType): String = stringResource(when (type) {
+    SleepEventType.BED_TIME -> R.string.sleep_bed_time
+    SleepEventType.FINAL_GET_UP -> R.string.sleep_final_get_up
+    SleepEventType.NIGHT_GET_UP -> R.string.sleep_night_get_up
+    SleepEventType.SLEEP -> R.string.sleep_sleep
+    SleepEventType.NAP -> R.string.sleep_nap
+    SleepEventType.LONG_AWAKE -> R.string.sleep_long_awake
+    SleepEventType.HALF_SLEEP -> R.string.sleep_half_sleep
+    SleepEventType.DAYTIME_SLEEPINESS -> R.string.sleep_sleepiness
+})

android/app/src/main/java/com/labfytools/trainlog/ui/SyncScreen.kt

@@ -8,6 +8,8 @@ package com.labfytools.trainlog.ui
 /* TRAINLOG_ANDROID_TRIGGERED_SYNC_V1 */
 
 import android.content.Context
+import android.Manifest
+import android.os.Build
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.ui.platform.LocalContext
@@ -25,6 +27,21 @@ import com.labfytools.trainlog.data.SyncExportResult
 import com.labfytools.trainlog.data.SyncReceiptResult
 import com.labfytools.trainlog.data.SyncRequestOutbox
 import com.labfytools.trainlog.data.SyncRequestResult
+import com.labfytools.trainlog.data.TrainlogRepository
+import com.labfytools.trainlog.data.ForegroundGenerationResult
+import com.labfytools.trainlog.data.BackgroundSyncRunLedger
+import com.labfytools.trainlog.data.SyncConversationArbiter
+import com.labfytools.trainlog.data.SyncConversationIntent
+import com.labfytools.trainlog.data.SyncGenerationForegroundCoordinator
+import com.labfytools.trainlog.data.BackgroundSyncSettings
+import com.labfytools.trainlog.data.SyncBackgroundService
+import com.labfytools.trainlog.data.AiExportDriveSettings
+import com.labfytools.trainlog.data.BluetoothSyncSettings
+import com.labfytools.trainlog.data.bondedBluetoothDesktops
+import com.labfytools.trainlog.data.hasBluetoothConnectPermission
+import com.labfytools.trainlog.data.canonicalExchangeDirectory
+import com.labfytools.trainlog.data.AndroidMtpPublicationVisibility
+import com.labfytools.trainlog.data.MtpPublicationVisibility
 import com.labfytools.trainlog.data.logDirectExchange
 import com.labfytools.trainlog.data.directStoragePermissionIntent
 import com.labfytools.trainlog.ui.theme.LocalTrainlogColors
@@ -37,6 +54,103 @@ import com.labfytools.trainlog.R
 /* Package-visible for orchestration tests: this is the production ordering
  * boundary, not a duplicate test-only implementation. */
 internal suspend fun publishBundleAndRequest(
+    repository: TrainlogRepository,
+    exporter: SyncExporter,
+    requestOutbox: SyncRequestOutbox,
+    visibility: MtpPublicationVisibility = com.labfytools.trainlog.data.ImmediateMtpPublicationVisibility,
+    explicitClaim: SyncConversationArbiter.ExplicitClaim =
+        SyncConversationArbiter.process.announceExplicit(),
+    terminalLedger: BackgroundSyncRunLedger? = null,
+): SyncRequestResult = withContext(Dispatchers.IO) {
+    try {
+        val directory = canonicalExchangeDirectory()
+        val coordinator = SyncGenerationForegroundCoordinator(repository, visibility)
+        return@withContext when (
+            val result = coordinator.run(
+                directory,
+                afterPeerPublication = {
+                    val opened = exporter.openStorageSnapshot()
+                    if (opened is com.labfytools.trainlog.data.DirectExchangeSnapshotResult.Error) {
+                        throw IllegalStateException(opened.message)
+                    }
+                    val snapshot =
+                        (opened as com.labfytools.trainlog.data.DirectExchangeSnapshotResult.Ready)
+                            .snapshot
+                    val requestIntent = requestOutbox.newIntent()
+                    /* WHY: a strict V3 snapshot cannot represent causal
+                     * tombstones, but the complete generation can. CONTRACT:
+                     * publish and confirm the modern trigger before attempting
+                     * optional legacy compatibility. INVARIANT: an old desktop
+                     * sees this intent only after a fresh V3 bundle succeeds. */
+                    when (
+                        val request =
+                            requestOutbox.publishFullGeneration(snapshot, requestIntent)
+                    ) {
+                        is SyncRequestResult.Requested -> Unit
+                        SyncRequestResult.Unsupported ->
+                            throw IllegalStateException("Generation synchronization is unsupported.")
+                        is SyncRequestResult.Error -> throw IllegalStateException(request.message)
+                        is SyncRequestResult.Completed ->
+                            throw IllegalStateException("Unexpected completed request signal.")
+                    }
+                    when (exporter.exportMobileBundle(snapshot)) {
+                        is SyncExportResult.Exported ->
+                            when (requestOutbox.publishLegacy(snapshot, requestIntent)) {
+                                is SyncRequestResult.Requested ->
+                                    logDirectExchange(
+                                        "trainlog-sync-request-v1.json",
+                                        "legacy_compatibility_published",
+                                    )
+                                else ->
+                                    logDirectExchange(
+                                        "trainlog-sync-request-v1.json",
+                                        "legacy_compatibility_unavailable",
+                                    )
+                            }
+                        SyncExportResult.Unsupported,
+                        is SyncExportResult.Error ->
+                            logDirectExchange(
+                                "trainlog-sync-request-v1.json",
+                                "legacy_compatibility_unavailable",
+                            )
+                    }
+                },
+                intent = SyncConversationIntent.NEW_EXPLICIT,
+                explicitClaim = explicitClaim,
+            )
+        ) {
+            is ForegroundGenerationResult.Completed -> SyncRequestResult.Completed(result.runId)
+            ForegroundGenerationResult.Busy ->
+                SyncRequestResult.Error("sync_interrupted")
+            is ForegroundGenerationResult.Superseded ->
+                SyncRequestResult.Error("sync_interrupted").also {
+                    result.runId?.let { runId ->
+                        terminalLedger?.recordTerminal(
+                            runId,
+                            coordinator.remoteEvidence(directory, runId),
+                        )
+                    }
+                }
+            is ForegroundGenerationResult.Cancelled ->
+                SyncRequestResult.Error("sync_interrupted")
+            is ForegroundGenerationResult.Failed ->
+                SyncRequestResult.Error(result.message).also {
+                    result.runId?.let { runId ->
+                        terminalLedger?.recordTerminal(
+                            runId,
+                            coordinator.remoteEvidence(directory, runId),
+                        )
+                    }
+                }
+        }
+    } finally {
+        explicitClaim.close()
+    }
+}
+
+/* Compatibility tooling keeps the standalone V3 publisher strict and
+ * available, but production Android triggers no longer select this path. */
+internal suspend fun publishLegacyBundleAndRequest(
     exporter: SyncExporter,
     requestOutbox: SyncRequestOutbox,
 ): SyncRequestResult = withContext(Dispatchers.IO) {
@@ -47,9 +161,7 @@ internal suspend fun publishBundleAndRequest(
         is com.labfytools.trainlog.data.DirectExchangeSnapshotResult.Ready ->
             when (val publication = exporter.exportMobileBundle(opened.snapshot)) {
                 SyncExportResult.Unsupported -> SyncRequestResult.Unsupported
-                is SyncExportResult.Error -> SyncRequestResult.Error(
-                    "prepare:${publication.message}",
-                )
+                is SyncExportResult.Error -> SyncRequestResult.Error("prepare:${publication.message}")
                 is SyncExportResult.Exported -> {
                     logDirectExchange("SYNC_BUNDLE", "coordinator.export.success")
                     logDirectExchange("trainlog-sync-request-v1.json", "coordinator.request.begin")
@@ -78,6 +190,7 @@ internal fun visibleReceiptStatus(
 
 @Composable
 fun SyncScreen(
+    repository: TrainlogRepository,
     inbox: SyncCatalogInbox,
     exporter: SyncExporter,
     requestOutbox: SyncRequestOutbox,
@@ -94,8 +207,11 @@ fun SyncScreen(
         add(strings.resources.getQuantityString(R.plurals.catalog_reconciled, reconciled, reconciled))
         skipped?.let { add(strings.resources.getQuantityString(R.plurals.catalog_present, it, it)) }
     }.joinToString(", ")
-    fun visibleError(raw: String): String = raw.removePrefix("prepare:").let {
-        if (raw.startsWith("prepare:")) strings.getString(R.string.sync_prepare_error, it) else raw
+    fun visibleError(raw: String): String = when {
+        raw == "sync_interrupted" -> strings.getString(R.string.sync_interrupted)
+        raw.startsWith("prepare:") ->
+            strings.getString(R.string.sync_prepare_error, raw.removePrefix("prepare:"))
+        else -> raw
     }
 
     var status by
@@ -125,6 +241,63 @@ fun SyncScreen(
         }
 
     var syncRunning by remember { mutableStateOf(false) }
+    val backgroundSettings = remember { BackgroundSyncSettings(context) }
+    var backgroundEnabled by remember { mutableStateOf(backgroundSettings.enabled) }
+    val driveSettings = remember { AiExportDriveSettings(context) }
+    var driveConnected by remember { mutableStateOf(driveSettings.connected) }
+    val bluetoothSettings = remember { BluetoothSyncSettings(context) }
+    var bluetoothPermission by remember {
+        mutableStateOf(hasBluetoothConnectPermission(context))
+    }
+    var bluetoothDesktop by remember {
+        mutableStateOf(bluetoothSettings.desktopAddress)
+    }
+    var bondedDesktops by remember {
+        mutableStateOf(
+            if (bluetoothPermission) bondedBluetoothDesktops(context) else emptyList()
+        )
+    }
+
+    val driveFolderLauncher = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.OpenDocumentTree(),
+    ) { uri ->
+        if (uri != null) {
+            runCatching { driveSettings.connect(uri) }
+                .onSuccess {
+                    driveConnected = true
+                    status = strings.getString(R.string.drive_sync_connected)
+                }
+                .onFailure { status = strings.getString(R.string.drive_sync_connection_failed) }
+        }
+    }
+
+    val bluetoothPermissionLauncher = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.RequestPermission(),
+    ) { granted ->
+        bluetoothPermission = granted || Build.VERSION.SDK_INT < Build.VERSION_CODES.S
+        bondedDesktops =
+            if (bluetoothPermission) bondedBluetoothDesktops(context) else emptyList()
+        if (bluetoothPermission && backgroundSettings.enabled) {
+            SyncBackgroundService.start(context)
+        }
+        status =
+            if (bluetoothPermission) {
+                strings.getString(R.string.bluetooth_sync_permission_granted)
+            } else {
+                strings.getString(R.string.bluetooth_sync_permission_required)
+            }
+    }
+
+    val notificationPermissionLauncher = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.RequestPermission(),
+    ) { granted ->
+        if (granted || Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) {
+            SyncBackgroundService.start(context)
+            backgroundEnabled = true
+        } else {
+            status = strings.getString(R.string.background_sync_notification_required)
+        }
+    }
 
     LaunchedEffect(
         pendingRequestId
@@ -312,10 +485,35 @@ fun SyncScreen(
                      * published from one prepared repository snapshot before
                      * that signal becomes visible; otherwise the PC can mix a
                      * fresh V3 file with stale or absent causal companions. */
+                    /* WHY: Samsung may freeze the activity after USB mode
+                     * changes or a permission surface opens. CONTRACT:
+                     * announce explicit priority before waking the service.
+                     * The service may keep Android alive, but cannot become
+                     * conversation owner while this claim is pending. */
+                    val explicitClaim = SyncConversationArbiter.process.announceExplicit()
+                    if (backgroundSettings.enabled) SyncBackgroundService.start(context)
                     syncRunning = true
+                    status = strings.getString(R.string.sync_running)
                     coroutineScope.launch {
                         try {
-                            when (val result = publishBundleAndRequest(exporter, requestOutbox)) {
+                            when (
+                                val result = publishBundleAndRequest(
+                                    repository,
+                                    exporter,
+                                    requestOutbox,
+                                    AndroidMtpPublicationVisibility(context),
+                                    explicitClaim,
+                                    BackgroundSyncRunLedger(context),
+                                )
+                            ) {
+                                is SyncRequestResult.Completed -> {
+                                    // The generation coordinator has already consumed the
+                                    // desktop return and published its durable ACK. Waiting
+                                    // for the legacy receipt here would leave a false spinner.
+                                    success = true
+                                    pendingRequestId = null
+                                    status = strings.getString(R.string.sync_generation_complete)
+                                }
                                 is SyncRequestResult.Requested -> {
                                     success = true
                                     pendingRequestId = result.requestId
@@ -331,6 +529,7 @@ fun SyncScreen(
                                 }
                             }
                         } finally {
+                            explicitClaim.close()
                             syncRunning = false
                         }
                     }
@@ -406,6 +605,121 @@ fun SyncScreen(
             )
         }
 
+        TrainlogFrame(title = strings.getString(R.string.bluetooth_sync_title)) {
+            TrainlogInfo(
+                text = strings.getString(R.string.bluetooth_sync_description),
+                color =
+                    if (bluetoothDesktop != null && bluetoothPermission) colors.success
+                    else colors.warning,
+            )
+            if (!bluetoothPermission) {
+                TrainlogAction(
+                    label = strings.getString(R.string.bluetooth_sync_permission),
+                    description = strings.getString(R.string.bluetooth_sync_permission_required),
+                    accent = colors.success,
+                    onClick = {
+                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+                            bluetoothPermissionLauncher.launch(Manifest.permission.BLUETOOTH_CONNECT)
+                        } else {
+                            bluetoothPermission = true
+                            bondedDesktops = bondedBluetoothDesktops(context)
+                        }
+                    },
+                )
+            } else {
+                if (bondedDesktops.isEmpty()) {
+                    TrainlogInfo(
+                        text = strings.getString(R.string.bluetooth_sync_no_desktop),
+                        color = colors.warning,
+                    )
+                }
+                bondedDesktops.forEach { desktop ->
+                    TrainlogAction(
+                        label = strings.getString(R.string.bluetooth_sync_select, desktop.name),
+                        description = strings.getString(R.string.bluetooth_sync_address, desktop.address),
+                        accent =
+                            if (bluetoothDesktop == desktop.address) colors.success else colors.accent,
+                        onClick = {
+                            bluetoothSettings.selectDesktop(desktop.address)
+                            bluetoothDesktop = desktop.address
+                            status =
+                                strings.getString(R.string.bluetooth_sync_selected, desktop.name)
+                            if (backgroundSettings.enabled) {
+                                SyncBackgroundService.start(context)
+                            }
+                        },
+                    )
+                }
+                if (bluetoothDesktop != null) {
+                    TrainlogAction(
+                        label = strings.getString(R.string.bluetooth_sync_disconnect),
+                        description =
+                            strings.getString(
+                                R.string.bluetooth_sync_address,
+                                bluetoothDesktop ?: "",
+                            ),
+                        accent = colors.warning,
+                        onClick = {
+                            bluetoothSettings.disconnect()
+                            bluetoothDesktop = null
+                        },
+                    )
+                }
+            }
+        }
+
+        TrainlogFrame(title = strings.getString(R.string.background_sync_title)) {
+            TrainlogInfo(
+                text = strings.getString(R.string.background_sync_description),
+                color = if (backgroundEnabled) colors.success else colors.warning,
+            )
+            TrainlogAction(
+                label = strings.getString(
+                    if (backgroundEnabled) R.string.background_sync_disable
+                    else R.string.background_sync_enable,
+                ),
+                description = strings.getString(R.string.background_sync_description),
+                accent = if (backgroundEnabled) colors.warning else colors.success,
+                onClick = {
+                    if (backgroundEnabled) {
+                        SyncBackgroundService.stop(context)
+                        backgroundEnabled = false
+                    } else if (
+                        Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU &&
+                        context.checkSelfPermission(Manifest.permission.POST_NOTIFICATIONS) !=
+                        android.content.pm.PackageManager.PERMISSION_GRANTED
+                    ) {
+                        notificationPermissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS)
+                    } else {
+                        SyncBackgroundService.start(context)
+                        backgroundEnabled = true
+                    }
+                },
+            )
+        }
+
+        TrainlogFrame(title = strings.getString(R.string.drive_sync_title)) {
+            TrainlogInfo(
+                text = strings.getString(R.string.drive_sync_description),
+                color = if (driveConnected) colors.success else colors.warning,
+            )
+            TrainlogAction(
+                label = strings.getString(
+                    if (driveConnected) R.string.drive_sync_disconnect else R.string.drive_sync_connect,
+                ),
+                description = strings.getString(R.string.drive_sync_latency),
+                accent = if (driveConnected) colors.warning else colors.success,
+                onClick = {
+                    if (driveConnected) {
+                        driveSettings.disconnect()
+                        driveConnected = false
+                    } else {
+                        driveFolderLauncher.launch(null)
+                    }
+                },
+            )
+        }
+
         if (status != null) {
             TrainlogFrame(
                 title = strings.getString(R.string.sync_status),

android/app/src/main/java/com/labfytools/trainlog/ui/TrainlogApp.kt

@@ -62,7 +62,7 @@ fun TrainlogApp(repository: TrainlogRepository, exporter: SyncExporter, inbox: S
     val draftLoad = remember(draftRevision, catalogRevision) { repository.loadActiveSessionDraft() }
     val activeDraft = (draftLoad as? ActiveDraftLoadResult.Loaded)?.draft
     val pendingAiDraftCount = remember(draftRevision, catalogRevision) {
-        repository.listAiSessionDrafts().size
+        repository.listAiSessionDrafts().size + repository.listPreparedSessions().size
     }
 
     fun open(route: AppRoute) { navigationController.open(route) }
@@ -93,7 +93,6 @@ fun TrainlogApp(repository: TrainlogRepository, exporter: SyncExporter, inbox: S
         when (val route = navigation.route) {
             AppRoute.Home -> HomeScreen(
                 activeDraft, draftMessage ?: (draftLoad as? ActiveDraftLoadResult.Error)?.let { localizedRepositoryMessage(localized, it.message) } ?: (draftLoad as? ActiveDraftLoadResult.Loaded)?.warning?.let { localizedRepositoryMessage(localized, it) },
-                repository.listSessions().firstOrNull(), repository.listLatestExerciseMaxima().firstOrNull(),
                 repository.getBodyZoneHomeOverview(),
                 ::openManualSession,
                 { zoneId ->
@@ -102,12 +101,33 @@ fun TrainlogApp(repository: TrainlogRepository, exporter: SyncExporter, inbox: S
                     exerciseState.searchQuery.value = ""
                     open(AppRoute.Exercises)
                 },
-                { open(AppRoute.Statistics) },
-                { open(AppRoute.BodyMeasurements) }, { open(AppRoute.SessionDetail(it)) }, { open(AppRoute.Sync) },
+                { open(AppRoute.BodyMeasurements) }, { open(AppRoute.Sync) },
+            )
+            AppRoute.Sessions -> SessionsHub(
+                activeDraft,
+                pendingAiDraftCount,
+                { open(AppRoute.SessionEditor) },
+                ::openManualSession,
+                { open(AppRoute.AiSessionDrafts) },
+                { open(AppRoute.CompletedSessions) },
+                { open(AppRoute.Programs) },
+                { open(AppRoute.CardioCalibration) },
+            )
+            AppRoute.SessionEditor -> SessionScreen(
+                repository,
+                catalogRevision,
+                { draftRevision++; back() },
+                { open(AppRoute.ExerciseCreate(AppRoute.SessionEditor)) },
+                { editingEntryId ->
+                    appState.pendingSessionEquipmentEntryId = editingEntryId
+                    open(AppRoute.EquipmentCreate(AppRoute.SessionEditor))
+                },
+                { exportSnapshot(); draftRevision++ },
+                restoreEditingEntryId = appState.pendingSessionEquipmentEntryId,
+                onEditingContextRestored = {
+                    appState.pendingSessionEquipmentEntryId = null
+                },
             )
-            AppRoute.Sessions -> SessionsHub(activeDraft, pendingAiDraftCount, { open(AppRoute.SessionEditor) }, ::openManualSession,
-                { open(AppRoute.AiSessionDrafts) }, { open(AppRoute.CompletedSessions) })
-            AppRoute.SessionEditor -> SessionScreen(repository, catalogRevision, { draftRevision++; back() }, { open(AppRoute.ExerciseCreate(AppRoute.SessionEditor)) }, { exportSnapshot(); draftRevision++ })
             AppRoute.SessionGenerator -> SessionGeneratorScreen(repository, generatorState, { back() }, { generatorState.abandon(); draftRevision++; open(AppRoute.SessionEditor) }, {
                 draftMessage = strings.getString(R.string.existing_draft_warning)
                 draftRevision++
@@ -124,6 +144,15 @@ fun TrainlogApp(repository: TrainlogRepository, exporter: SyncExporter, inbox: S
                 onStarted = { open(AppRoute.SessionEditor) },
             )
             AppRoute.CompletedSessions -> HistoryScreen(repository, { back() }) { open(AppRoute.SessionDetail(it)) }
+            AppRoute.Programs -> ProgramsScreen(repository) { open(AppRoute.ProgramDetail(it)) }
+            AppRoute.CardioCalibration -> CardioCalibrationScreen(repository) {
+                draftRevision++
+                exportSnapshot()
+            }
+            is AppRoute.ProgramDetail -> ProgramDetailScreen(repository, route.programId) {
+                draftRevision++
+                open(AppRoute.SessionEditor)
+            }
             is AppRoute.SessionDetail -> SessionDetailScreen(repository, route.sessionId, { back() }, { open(AppRoute.SessionCorrection(route.sessionId)) }) { draftRevision++; open(AppRoute.SessionEditor) }
             is AppRoute.SessionCorrection -> CompletedSessionCorrectionScreen(repository, route.sessionId) { saved ->
                 if (saved) exportSnapshot()
@@ -135,12 +164,51 @@ fun TrainlogApp(repository: TrainlogRepository, exporter: SyncExporter, inbox: S
             is AppRoute.ExerciseEdit -> ExerciseEditorRoute(repository, exerciseState, route.exerciseId, false) { exportSnapshot(); catalogRevision++; back() }
             AppRoute.Equipment -> EquipmentScreen(repository, equipmentState, { open(AppRoute.EquipmentCreate(AppRoute.Equipment)) }, { open(AppRoute.EquipmentDetail(it)) })
             is AppRoute.EquipmentDetail -> EquipmentDetailScreen(repository, route.equipmentId) { open(AppRoute.ExerciseDetail(it)) }
-            is AppRoute.EquipmentCreate -> EquipmentCreateScreen(repository, equipmentState) { exportSnapshot(); catalogRevision++; back() }
-            AppRoute.Statistics -> StatisticsDashboard(repository)
+            is AppRoute.EquipmentCreate -> EquipmentCreateScreen(repository, equipmentState) { equipment ->
+                /* WHY: equipment creation temporarily leaves the active-session editor.
+                 * CONTRACT: returning from that catalogue route preserves the durable
+                 * form and selects the exact stable ID that was just created.
+                 * INVARIANT: no equipment is synthesized; this runs only after the
+                 * explicit EquipmentCreateScreen action succeeded. */
+                if (route.caller == AppRoute.SessionEditor) {
+                    when (val loaded = repository.loadActiveSessionDraft()) {
+                        is ActiveDraftLoadResult.Loaded -> when (
+                            val saved = repository.saveActiveSessionDraft(
+                                loaded.draft.copy(
+                                    form = loaded.draft.form.copy(
+                                        editingExerciseIndex = appState.pendingSessionEquipmentEntryId
+                                            ?.let { entryId ->
+                                                loaded.draft.exercises.indexOfFirst {
+                                                    it.entryId == entryId
+                                                }.takeIf { it >= 0 }
+                                            },
+                                        editingEntryId = appState.pendingSessionEquipmentEntryId,
+                                        selectedEquipmentId = equipment.equipmentId,
+                                    ),
+                                ),
+                            )
+                        ) {
+                            ActiveDraftMutationResult.Saved -> draftRevision++
+                            is ActiveDraftMutationResult.Error -> {
+                                draftMessage = localizedRepositoryMessage(localized, saved.message)
+                            }
+                        }
+                        is ActiveDraftLoadResult.Error -> {
+                            draftMessage = localizedRepositoryMessage(localized, loaded.message)
+                        }
+                        ActiveDraftLoadResult.None -> Unit
+                    }
+                }
+                exportSnapshot()
+                catalogRevision++
+                back()
+            }
             AppRoute.BodyMeasurements -> BodyScreen(repository, bodyState, { exportSnapshot() }, { back() })
+            AppRoute.SleepDiary -> SleepDiaryScreen(repository)
             AppRoute.LatestMaxima -> LatestMaximaScreen(repository)
-            AppRoute.Sync -> SyncScreen(inbox, exporter, requestOutbox, { exportSnapshot(); catalogRevision++ }, { back() })
-            AppRoute.Settings -> SettingsScreen(inbox) { exportSnapshot(); catalogRevision++ }
+            AppRoute.Sync -> SyncScreen(repository, inbox, exporter, requestOutbox, { exportSnapshot(); catalogRevision++ }, { back() })
+            AppRoute.Settings -> SettingsScreen(repository, inbox, { open(AppRoute.HeartRateDiagnostics) }) { exportSnapshot(); catalogRevision++ }
+            AppRoute.HeartRateDiagnostics -> HeartRateDiagnosticsScreen { back() }
         }}
     }
 
@@ -164,6 +232,7 @@ fun TrainlogApp(repository: TrainlogRepository, exporter: SyncExporter, inbox: S
 private fun AppRoute.stateKey(): String = when (this) {
     is AppRoute.SessionDetail -> "session:${sessionId}"
     is AppRoute.SessionCorrection -> "session-correction:${sessionId}"
+    is AppRoute.ProgramDetail -> "program:${programId}"
     is AppRoute.ExerciseDetail -> "exercise:${exerciseId}"
     is AppRoute.ExerciseEdit -> "exercise-edit:${exerciseId}:${caller.section}"
     is AppRoute.ExerciseCreate -> "exercise-create:${caller.section}"

android/app/src/main/java/com/labfytools/trainlog/ui/TrainlogComponents.kt

@@ -23,6 +23,7 @@ import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.text.BasicText
@@ -37,6 +38,7 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -164,7 +166,7 @@ fun TrainlogAction(
                 .padding(vertical = 3.dp)
                 .heightIn(min = 48.dp)
                 .height(IntrinsicSize.Min)
-                .background(Color.Transparent)
+                .background(colors.surface, MaterialTheme.shapes.medium)
                 .clickable(onClick = onClick)
     ) {
         Column(
@@ -199,6 +201,46 @@ fun TrainlogAction(
     }
 }
 
+/** Presentation-only surface for dense object summaries and repeated rows. */
+@Composable
+fun TrainlogCompactCard(
+    modifier: Modifier = Modifier,
+    onClick: (() -> Unit)? = null,
+    content: @Composable ColumnScope.() -> Unit,
+) {
+    val colors = LocalTrainlogColors.current
+    val interaction = if (onClick == null) Modifier else Modifier.clickable(onClick = onClick)
+    Column(
+        modifier
+            .fillMaxWidth()
+            .background(colors.surface, MaterialTheme.shapes.medium)
+            .then(interaction)
+            .padding(12.dp),
+        verticalArrangement = Arrangement.spacedBy(6.dp),
+        content = content,
+    )
+}
+
+/** Small non-interactive metadata token; business state remains caller-owned. */
+@Composable
+fun TrainlogMetaBadge(
+    text: String,
+    modifier: Modifier = Modifier,
+    accent: Color? = null,
+) {
+    val colors = LocalTrainlogColors.current
+    Text(
+        text = text,
+        modifier = modifier.background(colors.surfaceAlt, MaterialTheme.shapes.small)
+            .padding(horizontal = 8.dp, vertical = 4.dp),
+        color = accent ?: colors.text,
+        style = TrainlogTypography.small,
+        maxLines = 1,
+    )
+}
+
+enum class TrainlogButtonStyle { PRIMARY, SECONDARY, SUCCESS, DESTRUCTIVE, GHOST }
+
 /** Compact pictogram action with a mandatory accessible name. */
 @Composable
 fun TrainlogIconAction(
@@ -225,11 +267,13 @@ fun TrainlogDeleteButton(
     contentDescription: String,
     onClick: () -> Unit,
     modifier: Modifier = Modifier,
+    fullWidth: Boolean = true,
 ) {
     val colors = LocalTrainlogColors.current
     Button(
         onClick = onClick,
-        modifier = modifier.fillMaxWidth().heightIn(min = 52.dp),
+        modifier = (if (fullWidth) modifier.fillMaxWidth() else modifier).heightIn(min = 48.dp),
+        shape = MaterialTheme.shapes.medium,
         colors = ButtonDefaults.buttonColors(containerColor = colors.error),
     ) {
         Icon(TrainlogIcons.DeleteOutline, contentDescription = contentDescription)
@@ -240,9 +284,7 @@ fun TrainlogDeleteButton(
 fun TrainlogPrimaryAction(label: String, description: String, onClick: () -> Unit) {
     val colors = LocalTrainlogColors.current
     Column(Modifier.fillMaxWidth().padding(bottom = 12.dp)) {
-        Button(onClick = onClick, modifier = Modifier.fillMaxWidth().heightIn(min = 48.dp)) {
-            Text(label)
-        }
+        TrainlogButton(label, onClick, Modifier.fillMaxWidth())
         if (description.isNotBlank()) {
             BasicText(
                 description,
@@ -270,7 +312,7 @@ fun TrainlogActionTile(
     Column(
         modifier
             .heightIn(min = 112.dp)
-            .background(colors.surface, RoundedCornerShape(12.dp))
+            .background(colors.surface, MaterialTheme.shapes.medium)
             .clickable(onClick = onClick)
             .padding(12.dp),
         verticalArrangement = Arrangement.spacedBy(6.dp),
@@ -291,13 +333,33 @@ fun TrainlogButton(
     containerColor: Color? = null,
     maxLines: Int = 1,
     enabled: Boolean = true,
+    style: TrainlogButtonStyle = TrainlogButtonStyle.PRIMARY,
 ) {
+    val colors = LocalTrainlogColors.current
+    val resolvedContainer = containerColor ?: when (style) {
+        TrainlogButtonStyle.PRIMARY -> colors.accent
+        TrainlogButtonStyle.SECONDARY -> colors.surfaceAlt
+        TrainlogButtonStyle.SUCCESS -> colors.success
+        TrainlogButtonStyle.DESTRUCTIVE -> colors.error
+        TrainlogButtonStyle.GHOST -> Color.Transparent
+    }
+    val resolvedContent = when (style) {
+        TrainlogButtonStyle.PRIMARY, TrainlogButtonStyle.SUCCESS,
+        TrainlogButtonStyle.DESTRUCTIVE -> colors.crust
+        TrainlogButtonStyle.SECONDARY, TrainlogButtonStyle.GHOST -> colors.text
+    }
     Button(
         onClick = onClick,
         enabled = enabled,
         modifier = modifier.heightIn(min = 52.dp),
-        colors = containerColor?.let { ButtonDefaults.buttonColors(containerColor = it) }
-            ?: ButtonDefaults.buttonColors(),
+        shape = MaterialTheme.shapes.medium,
+        border = if (style == TrainlogButtonStyle.GHOST) BorderStroke(1.dp, colors.surfaceAlt) else null,
+        colors = ButtonDefaults.buttonColors(
+            containerColor = resolvedContainer,
+            contentColor = resolvedContent,
+            disabledContainerColor = colors.surfaceAlt,
+            disabledContentColor = colors.muted,
+        ),
         contentPadding = PaddingValues(horizontal = 10.dp, vertical = 8.dp),
     ) {
         icon?.let {
@@ -334,12 +396,15 @@ fun TrainlogInputField(
     label: String,
     value: String,
     onValueChange: (String) -> Unit,
+    modifier: Modifier = Modifier,
     keyboardOptions: KeyboardOptions =
         KeyboardOptions.Default,
     testTag: String? = null,
     singleLine: Boolean = true,
     minLines: Int = 1,
     maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE,
+    suffix: String? = null,
+    compact: Boolean = false,
 ) {
     val colors =
         LocalTrainlogColors.current
@@ -350,8 +415,7 @@ fun TrainlogInputField(
         }
 
     Column(
-        modifier =
-            Modifier.padding(bottom = 10.dp)
+        modifier = modifier.padding(bottom = 10.dp)
     ) {
         BasicText(
             text = label.uppercase(),
@@ -395,7 +459,7 @@ fun TrainlogInputField(
             modifier =
                 Modifier
                     .fillMaxWidth()
-                    .heightIn(min = 48.dp)
+                    .heightIn(min = if (compact) 44.dp else 48.dp)
                     .onFocusChanged {
                         focused = it.isFocused
                     }
@@ -406,11 +470,22 @@ fun TrainlogInputField(
                             Modifier.testTag(testTag)
                         }
                     )
-                    .background(colors.surface)
+                    .background(colors.surface, MaterialTheme.shapes.medium)
                     .padding(
-                        horizontal = 12.dp,
-                        vertical = 10.dp,
+                        horizontal = if (compact) 10.dp else 12.dp,
+                        vertical = if (compact) 8.dp else 10.dp,
                     ),
+            decorationBox = { innerTextField ->
+                Row(
+                    Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.spacedBy(6.dp),
+                ) {
+                    Box(Modifier.weight(1f)) { innerTextField() }
+                    suffix?.let {
+                        BasicText(it, style = TrainlogTypography.small.copy(color = colors.muted))
+                    }
+                }
+            },
         )
 
         Box(

android/app/src/main/java/com/labfytools/trainlog/ui/theme/TrainlogTheme.kt

@@ -9,12 +9,15 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.staticCompositionLocalOf
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Shapes
 import androidx.compose.material3.darkColorScheme
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.sp
+import androidx.compose.ui.unit.dp
 
 data class TrainlogColors(
     val background: Color,
@@ -110,6 +113,19 @@ fun TrainlogTheme(
         error = TrainlogDarkColors.error,
     )
     CompositionLocalProvider(LocalTrainlogColors provides TrainlogDarkColors) {
-        MaterialTheme(colorScheme = scheme, content = content)
+        /* INVARIANT: all Material controls share the same restrained corner
+         * language. Screen code may change size, but must not reintroduce the
+         * former pill-shaped action hierarchy. */
+        MaterialTheme(
+            colorScheme = scheme,
+            shapes = Shapes(
+                extraSmall = RoundedCornerShape(6.dp),
+                small = RoundedCornerShape(8.dp),
+                medium = RoundedCornerShape(10.dp),
+                large = RoundedCornerShape(12.dp),
+                extraLarge = RoundedCornerShape(14.dp),
+            ),
+            content = content,
+        )
     }
 }

android/app/src/main/res/values-en/strings.xml

@@ -8,10 +8,58 @@
     <string name="nav_statistics">Statistics</string>
     <string name="nav_sync">Synchronization</string>
     <string name="nav_settings">Settings</string>
+    <string name="nav_sleep">Sleep</string>
+    <string name="sleep_current_night">Current night</string>
+    <string name="sleep_morning">Morning</string>
+    <string name="sleep_day">Day</string>
+    <string name="sleep_bed_time">Bedtime</string>
+    <string name="sleep_final_get_up">Final get-up</string>
+    <string name="sleep_night_get_up">Night get-up</string>
+    <string name="sleep_sleep">Sleep</string>
+    <string name="sleep_nap">Nap</string>
+    <string name="sleep_long_awake">Long awakening</string>
+    <string name="sleep_half_sleep">Half-sleep</string>
+    <string name="sleep_sleepiness">Sleepiness</string>
+    <string name="sleep_quality">Sleep quality</string>
+    <string name="sleep_wake_quality">Wake quality</string>
+    <string name="sleep_day_form">Day form</string>
+    <string name="sleep_notes">Treatment and notes</string>
+    <string name="sleep_add_event">Add event</string>
+    <string name="sleep_save">Save</string>
+    <string name="sleep_validate">Validate day</string>
+    <string name="sleep_status_draft">Draft</string>
+    <string name="sleep_status_ready">Ready to sync</string>
+    <string name="sleep_status_synchronized">Synchronized</string>
+    <string name="sleep_status_modified">Modified since synchronization</string>
+    <string name="sleep_delete">Delete</string>
+    <string name="sleep_choose_time">Choose time</string>
     <string name="route_session_editor">Current session</string>
     <string name="route_session_generator">Plan a session</string>
     <string name="route_ai_drafts">Drafts</string>
     <string name="route_completed_sessions">Completed sessions</string>
+    <string name="route_programs">Programs</string>
+    <string name="route_program_detail">Program details</string>
+    <string name="programs_none">No synchronized programs.</string>
+    <string name="program_active">ACTIVE</string>
+    <string name="program_archived">ARCHIVED</string>
+    <string name="program_start_date">Start: %1$s</string>
+    <string name="program_end_date">End: %1$s</string>
+    <string name="program_open">View program</string>
+    <string name="program_not_found">Program not found.</string>
+    <string name="program_target_sets">%1$d sets</string>
+    <string name="program_target_reps">%1$d repetitions</string>
+    <string name="program_target_duration">%1$d s</string>
+    <string name="program_target_weight">%1$.1f kg</string>
+    <string name="program_session_todo">To do</string>
+    <string name="program_session_in_progress">In progress</string>
+    <string name="program_session_completed">Completed</string>
+    <string name="program_session_start">Start</string>
+    <string name="program_session_resume">Resume session</string>
+    <string name="program_session_completed_detail">This session has already been completed.</string>
+    <string name="program_session_unavailable">This session can no longer be started.</string>
+    <string name="program_session_show_occurrences">Show exercises</string>
+    <string name="program_session_hide_occurrences">Hide exercises</string>
+    <plurals name="program_session_count"><item quantity="one">%d session</item><item quantity="other">%d sessions</item></plurals>
     <string name="route_session_detail">Session details</string>
     <string name="route_session_correction">Edit session</string>
     <string name="route_exercise_detail">Exercise details</string>
@@ -71,10 +119,27 @@
     <string name="sync_action">Synchronize</string>
     <string name="sync_snapshot_automatic">The Android snapshot is maintained automatically.</string>
     <string name="sync_running">Synchronization in progress…</string>
+    <string name="sync_interrupted">Synchronization interrupted. You can start a new attempt.</string>
     <string name="sync_now">Synchronize now</string>
+    <string name="background_sync_title">Background synchronization</string>
+    <string name="background_sync_description">Allows Trainlog to receive PC synchronizations without opening the app.</string>
+    <string name="background_sync_enable">Enable background synchronization</string>
+    <string name="background_sync_disable">Disable background synchronization</string>
+    <string name="background_sync_channel">Trainlog synchronization</string>
+    <string name="background_sync_notification_title">Trainlog is ready to synchronize</string>
+    <string name="background_sync_notification_text">The service is waiting for a PC request.</string>
+    <string name="background_sync_notification_required">Allow notifications to enable background synchronization.</string>
+    <string name="drive_sync_title">Private Google Drive</string>
+    <string name="drive_sync_description">Select the private Trainlog/Sync/v1 folder. Trainlog only accesses that folder and never copies SQLite into it.</string>
+    <string name="drive_sync_connect">Connect Google Drive</string>
+    <string name="drive_sync_disconnect">Disconnect Google Drive</string>
+    <string name="drive_sync_latency">Background checks are bounded by Android and can take at least 15 minutes.</string>
+    <string name="drive_sync_connected">Drive folder connected. A check has been scheduled.</string>
+    <string name="drive_sync_connection_failed">Unable to retain access to the Drive folder.</string>
     <string name="sync_flow_description">Android → PC then PC → Android, in one operation.</string>
     <string name="sync_authorize_first">File access is required. Authorize Documents/Trainlog first.</string>
     <string name="sync_request_sent">Request sent · waiting for the PC…</string>
+    <string name="sync_generation_complete">Synchronization completed on Android and PC.</string>
     <string name="sync_android_unsupported">Android is not supported.</string>
     <string name="sync_folder_section">EXCHANGE FOLDER</string>
     <string name="sync_authorize_folder">Authorize access to the Trainlog folder</string>
@@ -294,6 +359,9 @@
     <string name="session_proposal">Session proposal</string><string name="planned_for">Planned for %1$s</string>
     <plurals name="repetition_count"><item quantity="one">%d repetition</item><item quantity="other">%d repetitions</item></plurals>
     <string name="start">Start</string><string name="start_proposal_description">Copy this proposal into the current session.</string>
+    <string name="manual_preparation">Manual preparation</string>
+    <string name="start_preparation_description">Creates a protected active session.</string>
+    <string name="draft_rest_short">rest %1$d s</string>
     <string name="draft_already_active">A session is already in progress. The imported draft was preserved.</string>
     <string name="delete_draft_detail">Draft “%1$s” will be deleted.\nThis action cannot be undone.</string>
     <string name="training">Training</string><string name="resume_current_session">Resume current session</string>
@@ -349,7 +417,7 @@
     <string name="regenerate_description">Run again with the same inputs and reference instant.</string><string name="accept_actual_description">Create the normal draft without prefilling performed sets.</string><string name="acknowledge_exposure_first">Confirm the recent-exposure warning first.</string>
     <string name="reason_observed_dose">observed repeated dose</string><string name="reason_max_no_prescription">observed maximum without numeric prescription</string><string name="reason_user_max">user-selected MAX percentage</string><string name="reason_max_unavailable">compatible MAX unavailable</string><string name="reason_assistance_omitted">assistance load omitted</string><string name="reason_load_absent">numeric load absent</string><string name="reason_manual_load">manually entered load</string><string name="reason_preferred">preferred exercise</string><string name="reason_primary_zone">requested primary zone</string><string name="reason_secondary_zone">requested secondary zone</string><string name="reason_distinct_movement">distinct movement</string><string name="reason_recent_exercise">same exercise observed recently</string><string name="reason_recent_pattern">similar movement observed recently</string>
     <string name="shortage_upper">missing upper region</string><string name="shortage_lower">missing lower region</string><string name="shortage_core">missing core</string><string name="shortage_push">missing upper-body push</string><string name="shortage_pull">missing upper-body pull</string><string name="shortage_lower_extension">missing lower-body extension</string><string name="shortage_lower_flexion">missing lower-body flexion</string><string name="shortage_exercises">fewer distinct exercises available</string>
-    <string name="create_equipment">Create equipment</string><string name="create_personal_machine">Add a personal machine.</string><string name="search_equipment">Search by name, label, or alias</string>
+    <string name="create_equipment">Create equipment</string><string name="create_personal_machine">Add a personal machine.</string><string name="create_equipment_from_session">Create it in the catalogue, then return to this exercise.</string><string name="search_equipment">Search by name, label, or alias</string>
     <string name="unknown_reference">Unknown reference · %1$s</string><string name="definition">Definition</string><string name="personal">Personal</string><string name="provided">Provided</string><string name="label_value">Label: %1$s</string>
     <string name="confidence_value">%1$s confidence</string><string name="verified_sources">Verified sources: %1$d</string><string name="personal_equipment">Personal equipment</string><string name="create">Create</string>
     <string name="create_machine_description">Create a personal machine with the current semantics.</string><string name="equipment_name_invalid">Enter a name of 1 to 120 characters.</string><string name="equipment_name_exists">Equipment already has this name.</string><string name="creation_failed">Creation failed: %1$s.</string>
@@ -396,4 +464,157 @@
     <string name="exercise_order_saved">Session order saved.</string>
     <string name="exercise_reorder_failed">Reorder was not saved: %1$s</string>
     <string name="invalid_decimal_value">Enter a valid decimal value using “,” or “.”.</string>
+    <string name="settings_backup_section">Complete local backup</string>
+    <string name="settings_backup_plaintext">The file contains plaintext health data. Keep it in a private location.</string>
+    <string name="settings_backup_create">Create backup</string>
+    <string name="settings_backup_create_description">Export the complete database, active draft, and preferences.</string>
+    <string name="settings_backup_restore">Restore backup</string>
+    <string name="settings_backup_restore_description">Verify and restore this installation. Synchronization must remain stopped.</string>
+    <string name="settings_backup_complete">Complete backup exported.</string>
+    <string name="settings_backup_failed">Backup failed; any private staged copy was retained.</string>
+    <string name="settings_restore_failed">The backup is invalid or could not be restored.</string>
+    <string name="sleep_medications">Medications</string>
+    <string name="sleep_add_medication">Add medication</string>
+    <string name="sleep_add_intake">Add intake</string>
+    <string name="sleep_dose">Dose</string>
+    <string name="sleep_unit">Unit</string>
+    <string name="sleep_deactivate">Deactivate</string>
+    <string name="sleep_edit">Edit</string>
+    <string name="yes">Yes</string>
+    <string name="no">No</string>
+    <string name="route_heart_rate_diagnostics">BLE heart-rate diagnostics</string>
+    <string name="settings_cardio_section">Cardio</string>
+    <string name="settings_cardio_diagnostics">Heart-rate sensor diagnostics</string>
+    <string name="settings_cardio_diagnostics_description">Find and verify a Bluetooth Heart Rate Service sensor.</string>
+    <string name="hr_diag_status">Sensor status</string>
+    <string name="hr_diag_idle">Ready</string>
+    <string name="hr_diag_scanning">Scanning…</string>
+    <string name="hr_diag_connecting">Connecting…</string>
+    <string name="hr_diag_discovering">Discovering services…</string>
+    <string name="hr_diag_subscribing">Enabling measurements…</string>
+    <string name="hr_diag_receiving">Measurements received</string>
+    <string name="hr_diag_disconnected">Disconnected</string>
+    <string name="hr_diag_error">BLE error</string>
+    <string name="hr_diag_permission_denied">Bluetooth permission denied.</string>
+    <string name="hr_diag_technical">Diagnostic: %1$s</string>
+    <string name="hr_diag_services">Heart Rate Service: %1$s · measurement: %2$s · battery: %3$s</string>
+    <string name="hr_diag_bpm">%1$d BPM</string>
+    <string name="hr_diag_measurement_meta">%1$d RR · contact %2$s · energy %3$s</string>
+    <string name="hr_diag_notifications">Notifications received: %1$d</string>
+    <string name="hr_diag_scan_section">BLE scan</string>
+    <string name="hr_diag_scan">Find heart-rate</string>
+    <string name="hr_diag_scan_all">Expanded scan</string>
+    <string name="hr_diag_scan_description">Heart-rate scan lasts at most 10 seconds. Expanded scan is for sensors that do not advertise their service in BLE advertisements.</string>
+    <string name="hr_diag_devices">BLE devices</string>
+    <string name="hr_diag_no_devices">No device found yet.</string>
+    <string name="hr_diag_unnamed_device">Unnamed device</string>
+    <string name="hr_diag_hrs_advertised">Heart Rate advertised</string>
+    <string name="hr_diag_hrs_not_advertised">Heart Rate not advertised</string>
+    <string name="hr_diag_device_description">%1$s · %2$d dBm · %3$s</string>
+    <string name="hr_diag_use_sensor">Use this sensor</string>
+    <string name="heart_rate_service_channel">Heart-rate sensor</string>
+    <string name="heart_rate_service_title">Trainlog · cardio</string>
+    <string name="heart_rate_service_connecting">Connecting to sensor…</string>
+    <string name="heart_rate_service_reconnecting">Waiting for heart-rate signal…</string>
+    <string name="heart_rate_service_disconnected">Heart-rate sensor disconnected</string>
+    <string name="heart_rate_service_bpm">%1$d BPM</string>
+    <string name="heart_rate_a11y_connected">Heart rate %1$d BPM, sensor connected</string>
+    <string name="heart_rate_a11y_connecting">Heart-rate sensor connecting</string>
+    <string name="heart_rate_a11y_reconnecting">Heart-rate signal temporarily lost, reconnecting</string>
+    <string name="heart_rate_a11y_disconnected">Heart-rate sensor disconnected</string>
+    <string name="settings_cardio_configured">Heart-rate sensor configured.</string>
+    <string name="settings_cardio_forget">Forget sensor</string>
+    <string name="settings_cardio_forget_description">Stop heart-rate connection and remove the remembered sensor.</string>
+    <string name="exercise_timeline_start">Start exercise</string>
+    <string name="exercise_timeline_finish">Finish exercise</string>
+    <string name="exercise_timeline_completed">Exercise completed</string>
+    <string name="exercise_timeline_started">%1$s · started</string>
+    <string name="exercise_timeline_finished">%1$s · finished</string>
+    <string name="exercise_timeline_switch_title">Switch exercise?</string>
+    <string name="exercise_timeline_switch_detail">%1$s is still active. Finish it now and then start %2$s?</string>
+    <string name="exercise_timeline_switch_confirm">Finish and start</string>
+    <string name="exercise_timeline_finalize_title">An exercise is still active</string>
+    <string name="exercise_timeline_finalize_detail">%1$s is still active. Finish it now and then save the session?</string>
+    <string name="exercise_timeline_finalize_confirm">Finish and save</string>
+
+    <string name="sleep_night_capture_title">Night capture</string>
+    <string name="sleep_no_night_active">No night in progress.</string>
+    <string name="sleep_night_in_progress">Night in progress · %1$s → %2$s</string>
+    <string name="sleep_quick_bed">🛏 BED</string>
+    <string name="sleep_quick_wake">👁 WAKE</string>
+    <string name="sleep_quick_get_up">☀ GET UP</string>
+    <string name="sleep_bed_recorded">Bed time recorded.</string>
+    <string name="sleep_wake_recorded">30-minute awakening recorded.</string>
+    <string name="sleep_get_up_recorded">Get-up recorded.</string>
+    <string name="sleep_medication_recorded">%1$s recorded.</string>
+    <string name="sleep_undo">UNDO</string>
+    <string name="sleep_action_undone">Last action undone.</string>
+    <string name="sleep_undo_unavailable">Undo unavailable: the night has already changed.</string>
+    <string name="sleep_correct_night">Correct the night</string>
+    <string name="sleep_return_night_mode">Back to night capture</string>
+    <string name="sleep_night_timeline">Night timeline</string>
+
+    <string name="sleep_quick_no_active">No night in progress.</string>
+    <string name="sleep_quick_already_active">A night is already in progress.</string>
+    <string name="sleep_quick_medication_unavailable">Medication unavailable.</string>
+    <string name="sleep_quick_conflict">The night changed; reload before trying again.</string>
+    <string name="sleep_quick_error">Unable to record the action.</string>
+    <string name="session_cardio">Cardio</string>
+    <string name="route_cardio_calibration">Cardio calibration</string>
+    <string name="calibration_explanation">This session measures your current heart-rate response. Effort increases progressively and you can stop immediately at any time. The result is stored as an observed heart-rate peak, not as a medical maximum heart rate.</string>
+    <string name="calibration_start">Start calibration</string>
+    <string name="calibration_start_description">Create a dedicated cardio session, start heart-rate capture and begin with warm-up.</string>
+    <string name="calibration_latest">Latest calibration</string>
+    <string name="calibration_current">Calibration in progress</string>
+    <string name="calibration_phase_value">Phase: %1$s</string>
+    <string name="calibration_phase_warmup">Warm-up</string>
+    <string name="calibration_phase_progressive">Progressive effort</string>
+    <string name="calibration_phase_high_effort">High effort</string>
+    <string name="calibration_phase_recovery">Recovery</string>
+    <string name="calibration_phase_completed">Completed</string>
+    <string name="calibration_phase_aborted">Stopped</string>
+    <string name="calibration_peak_value">Observed peak: %1$d BPM</string>
+    <string name="calibration_recovery_value">Recovery +%1$d min: %2$d BPM</string>
+    <string name="calibration_to_progressive">Start progressive effort</string>
+    <string name="calibration_progressive_description">Increase effort progressively without trying to beat a previous value.</string>
+    <string name="calibration_to_high_effort">Move to high effort</string>
+    <string name="calibration_high_effort_description">Continue only while you choose to tolerate the effort. The next button ends the effort phase immediately.</string>
+    <string name="calibration_end_effort">Stop effort</string>
+    <string name="calibration_end_effort_description">Mark the end of effort and begin measured recovery.</string>
+    <string name="calibration_finish">Finish calibration</string>
+    <string name="calibration_finish_description">Close recovery and save the calibration profile.</string>
+    <string name="calibration_abort">Stop calibration</string>
+    <string name="calibration_conflict">Another session or calibration is already active.</string>
+    <string name="cardio_guidance_title">Cardio guidance</string>
+    <string name="cardio_guidance_phase_value">Phase: %1$s</string>
+    <string name="cardio_guidance_target_value">Target: %1$d–%2$d BPM</string>
+    <string name="cardio_guidance_calibration_value">Calibration: observed peak %1$d BPM · %2$d–%3$d %%</string>
+    <string name="cardio_guidance_latest_calibration">Latest calibration: observed peak %1$d BPM</string>
+    <string name="cardio_guidance_resolved_target">Resolved target: %1$d–%2$d BPM</string>
+    <string name="cardio_guidance_accelerate">SPEED UP</string>
+    <string name="cardio_guidance_maintain">MAINTAIN</string>
+    <string name="cardio_guidance_slow_down">SLOW DOWN</string>
+    <string name="cardio_guidance_suspended">HEART-RATE SIGNAL UNAVAILABLE</string>
+    <string name="cardio_guidance_bpm_value">%1$d BPM</string>
+    <string name="cardio_guidance_bpm_missing">-- BPM</string>
+    <string name="cardio_guidance_start_phase">Start phase</string>
+    <string name="cardio_guidance_finish_phase">End phase</string>
+    <string name="cardio_guidance_invalid_configuration">Complete the target and exit condition.</string>
+    <string name="cardio_guidance_start_failed">Unable to start this phase.</string>
+    <string name="cardio_phase_warmup">Warm-up</string>
+    <string name="cardio_phase_work">Work</string>
+    <string name="cardio_phase_recovery">Recovery</string>
+    <string name="cardio_phase_cooldown">Cool-down</string>
+    <string name="cardio_target_absolute">BPM</string>
+    <string name="cardio_target_calibration">Calibration %%</string>
+    <string name="cardio_target_min_bpm">Min BPM</string>
+    <string name="cardio_target_max_bpm">Max BPM</string>
+    <string name="cardio_target_min_percent">Min %%</string>
+    <string name="cardio_target_max_percent">Max %%</string>
+    <string name="cardio_exit_duration">Duration</string>
+    <string name="cardio_exit_target">Enter target</string>
+    <string name="cardio_exit_recover">Below threshold</string>
+    <string name="cardio_exit_bounded">Duration or threshold</string>
+    <string name="cardio_exit_seconds">Max duration</string>
+    <string name="cardio_exit_recovery_bpm">Recovery threshold</string>
 </resources>

android/app/src/main/res/values/strings.xml

@@ -8,10 +8,58 @@
     <string name="nav_statistics">Statistiques</string>
     <string name="nav_sync">Synchronisation</string>
     <string name="nav_settings">Paramètres</string>
+    <string name="nav_sleep">Sommeil</string>
+    <string name="sleep_current_night">Nuit actuelle</string>
+    <string name="sleep_morning">Matin</string>
+    <string name="sleep_day">Journée</string>
+    <string name="sleep_bed_time">Mise au lit</string>
+    <string name="sleep_final_get_up">Lever</string>
+    <string name="sleep_night_get_up">Lever nocturne</string>
+    <string name="sleep_sleep">Sommeil</string>
+    <string name="sleep_nap">Sieste</string>
+    <string name="sleep_long_awake">Long réveil</string>
+    <string name="sleep_half_sleep">Demi-sommeil</string>
+    <string name="sleep_sleepiness">Somnolence</string>
+    <string name="sleep_quality">Qualité du sommeil</string>
+    <string name="sleep_wake_quality">Qualité du réveil</string>
+    <string name="sleep_day_form">Forme de la journée</string>
+    <string name="sleep_notes">Traitement et remarques</string>
+    <string name="sleep_add_event">Ajouter un événement</string>
+    <string name="sleep_save">Enregistrer</string>
+    <string name="sleep_validate">Valider la journée</string>
+    <string name="sleep_status_draft">Brouillon</string>
+    <string name="sleep_status_ready">Prête à synchroniser</string>
+    <string name="sleep_status_synchronized">Synchronisée</string>
+    <string name="sleep_status_modified">Modifiée depuis la synchronisation</string>
+    <string name="sleep_delete">Supprimer</string>
+    <string name="sleep_choose_time">Choisir l’heure</string>
     <string name="route_session_editor">Séance en cours</string>
     <string name="route_session_generator">Programmer une séance</string>
     <string name="route_ai_drafts">Brouillons</string>
     <string name="route_completed_sessions">Séances effectuées</string>
+    <string name="route_programs">Programmes</string>
+    <string name="route_program_detail">Détail du programme</string>
+    <string name="programs_none">Aucun programme synchronisé.</string>
+    <string name="program_active">ACTIF</string>
+    <string name="program_archived">ARCHIVÉ</string>
+    <string name="program_start_date">Début : %1$s</string>
+    <string name="program_end_date">Fin : %1$s</string>
+    <string name="program_open">Afficher le programme</string>
+    <string name="program_not_found">Programme introuvable.</string>
+    <string name="program_target_sets">%1$d séries</string>
+    <string name="program_target_reps">%1$d répétitions</string>
+    <string name="program_target_duration">%1$d s</string>
+    <string name="program_target_weight">%1$.1f kg</string>
+    <string name="program_session_todo">À faire</string>
+    <string name="program_session_in_progress">En cours</string>
+    <string name="program_session_completed">Effectuée</string>
+    <string name="program_session_start">Démarrer</string>
+    <string name="program_session_resume">Reprendre la séance</string>
+    <string name="program_session_completed_detail">Cette séance a déjà été effectuée.</string>
+    <string name="program_session_unavailable">Cette séance ne peut plus être démarrée.</string>
+    <string name="program_session_show_occurrences">Voir les exercices</string>
+    <string name="program_session_hide_occurrences">Masquer les exercices</string>
+    <plurals name="program_session_count"><item quantity="one">%d séance</item><item quantity="other">%d séances</item></plurals>
     <string name="route_session_detail">Détail de la séance</string>
     <string name="route_session_correction">Modifier la séance</string>
     <string name="route_exercise_detail">Fiche exercice</string>
@@ -71,10 +119,37 @@
     <string name="sync_action">Synchroniser</string>
     <string name="sync_snapshot_automatic">Le snapshot Android est maintenu automatiquement.</string>
     <string name="sync_running">Synchronisation en cours…</string>
+    <string name="sync_interrupted">Synchronisation interrompue. Une nouvelle tentative peut être lancée.</string>
     <string name="sync_now">Synchroniser maintenant</string>
+    <string name="background_sync_title">Synchronisation en arrière-plan</string>
+    <string name="background_sync_description">Permet à Trainlog de recevoir les synchronisations du PC sans ouvrir l’application.</string>
+    <string name="background_sync_enable">Activer la synchronisation en arrière-plan</string>
+    <string name="background_sync_disable">Désactiver la synchronisation en arrière-plan</string>
+    <string name="background_sync_channel">Synchronisation Trainlog</string>
+    <string name="background_sync_notification_title">Trainlog est prêt à synchroniser</string>
+    <string name="background_sync_notification_text">Le service attend une demande du PC.</string>
+    <string name="background_sync_notification_required">Autorisez les notifications pour activer la synchronisation en arrière-plan.</string>
+    <string name="bluetooth_sync_title">Bluetooth automatique</string>
+    <string name="bluetooth_sync_description">Trainlog se connecte automatiquement au PC appairé dès qu’il est à portée. MTP reste disponible en secours.</string>
+    <string name="bluetooth_sync_permission">Autoriser l’accès Bluetooth</string>
+    <string name="bluetooth_sync_permission_required">Autorisation Bluetooth requise pour la connexion automatique.</string>
+    <string name="bluetooth_sync_permission_granted">Bluetooth autorisé. Sélectionnez le PC appairé.</string>
+    <string name="bluetooth_sync_no_desktop">Aucun ordinateur appairé détecté.</string>
+    <string name="bluetooth_sync_select">Utiliser %1$s</string>
+    <string name="bluetooth_sync_selected">PC Bluetooth sélectionné : %1$s.</string>
+    <string name="bluetooth_sync_disconnect">Oublier le PC Bluetooth</string>
+    <string name="bluetooth_sync_address">%1$s</string>
+    <string name="drive_sync_title">Export IA Google Drive</string>
+    <string name="drive_sync_description">Sélectionnez une fois le dossier Trainlog/AI. Après chaque synchronisation, Android y publie automatiquement trainlog_ai_export_v1.json.</string>
+    <string name="drive_sync_connect">Choisir Trainlog/AI</string>
+    <string name="drive_sync_disconnect">Déconnecter l’export IA Drive</string>
+    <string name="drive_sync_latency">L’échec de Drive ne bloque jamais la synchronisation. Android conserve l’export local et réessaie automatiquement.</string>
+    <string name="drive_sync_connected">Dossier Trainlog/AI connecté. L’export sera publié automatiquement.</string>
+    <string name="drive_sync_connection_failed">Impossible de conserver l’accès au dossier Trainlog/AI.</string>
     <string name="sync_flow_description">Android → PC puis PC → Android, en une seule opération.</string>
     <string name="sync_authorize_first">Accès fichiers requis. Autorisez d’abord Documents/Trainlog.</string>
     <string name="sync_request_sent">Demande envoyée · attente du PC…</string>
+    <string name="sync_generation_complete">Synchronisation terminée sur Android et PC.</string>
     <string name="sync_android_unsupported">Android non supporté.</string>
     <string name="sync_folder_section">DOSSIER D’ÉCHANGE</string>
     <string name="sync_authorize_folder">Autoriser l’accès au dossier Trainlog</string>
@@ -294,6 +369,9 @@
     <string name="session_proposal">Proposition de séance</string><string name="planned_for">Prévue le %1$s</string>
     <plurals name="repetition_count"><item quantity="one">%d répétition</item><item quantity="other">%d répétitions</item></plurals>
     <string name="start">Démarrer</string><string name="start_proposal_description">Copier cette proposition dans la séance en cours.</string>
+    <string name="manual_preparation">Préparation manuelle</string>
+    <string name="start_preparation_description">Crée une séance en cours protégée.</string>
+    <string name="draft_rest_short">repos %1$d s</string>
     <string name="draft_already_active">Une séance est déjà en cours. Le brouillon importé a été conservé.</string>
     <string name="delete_draft_detail">Le brouillon « %1$s » sera supprimé.\nCette action est irréversible.</string>
     <string name="training">Entraînement</string><string name="resume_current_session">Reprendre la séance en cours</string>
@@ -349,7 +427,7 @@
     <string name="regenerate_description">Relancer les mêmes entrées et le même instant de référence.</string><string name="accept_actual_description">Créer le brouillon normal sans préremplir les séries réalisées.</string><string name="acknowledge_exposure_first">Confirmez d’abord l’avertissement d’exposition récente.</string>
     <string name="reason_observed_dose">dose répétée observée</string><string name="reason_max_no_prescription">maximum observé sans prescription numérique</string><string name="reason_user_max">pourcentage de MAX choisi par l’utilisateur</string><string name="reason_max_unavailable">MAX compatible indisponible</string><string name="reason_assistance_omitted">charge d’assistance omise</string><string name="reason_load_absent">charge numérique absente</string><string name="reason_manual_load">charge saisie manuellement</string><string name="reason_preferred">exercice préféré</string><string name="reason_primary_zone">zone principale demandée</string><string name="reason_secondary_zone">zone secondaire demandée</string><string name="reason_distinct_movement">mouvement distinct</string><string name="reason_recent_exercise">même exercice observé récemment</string><string name="reason_recent_pattern">mouvement similaire observé récemment</string>
     <string name="shortage_upper">région supérieure manquante</string><string name="shortage_lower">région inférieure manquante</string><string name="shortage_core">tronc manquant</string><string name="shortage_push">poussée du haut du corps manquante</string><string name="shortage_pull">tirage du haut du corps manquant</string><string name="shortage_lower_extension">extension du bas du corps manquante</string><string name="shortage_lower_flexion">flexion du bas du corps manquante</string><string name="shortage_exercises">moins d’exercices distincts disponibles</string>
-    <string name="create_equipment">Créer un équipement</string><string name="create_personal_machine">Ajouter une machine personnelle.</string><string name="search_equipment">Rechercher par nom, étiquette ou alias</string>
+    <string name="create_equipment">Créer un équipement</string><string name="create_personal_machine">Ajouter une machine personnelle.</string><string name="create_equipment_from_session">Créer dans le catalogue puis revenir à cet exercice.</string><string name="search_equipment">Rechercher par nom, étiquette ou alias</string>
     <string name="unknown_reference">Référence inconnue · %1$s</string><string name="definition">Définition</string><string name="personal">Personnel</string><string name="provided">Fourni</string><string name="label_value">Étiquette : %1$s</string>
     <string name="confidence_value">Confiance %1$s</string><string name="verified_sources">Sources vérifiées : %1$d</string><string name="personal_equipment">Équipement personnel</string><string name="create">Créer</string>
     <string name="create_machine_description">Créer une machine personnelle avec la sémantique actuelle.</string><string name="equipment_name_invalid">Saisissez un nom de 1 à 120 caractères.</string><string name="equipment_name_exists">Un équipement porte déjà ce nom.</string><string name="creation_failed">Création impossible : %1$s.</string>
@@ -396,4 +474,157 @@
     <string name="exercise_order_saved">Ordre de la séance enregistré.</string>
     <string name="exercise_reorder_failed">Réorganisation non enregistrée : %1$s</string>
     <string name="invalid_decimal_value">Saisissez une valeur décimale valide avec « , » ou « . ».</string>
+    <string name="settings_backup_section">Sauvegarde locale complète</string>
+    <string name="settings_backup_plaintext">Le fichier contient vos données de santé en clair. Conservez-le dans un emplacement privé.</string>
+    <string name="settings_backup_create">Créer une sauvegarde</string>
+    <string name="settings_backup_create_description">Exporter la base complète, le brouillon actif et les préférences.</string>
+    <string name="settings_backup_restore">Restaurer une sauvegarde</string>
+    <string name="settings_backup_restore_description">Vérifier puis restaurer cette installation. La synchronisation doit rester arrêtée.</string>
+    <string name="settings_backup_complete">Sauvegarde complète exportée.</string>
+    <string name="settings_backup_failed">Échec de la sauvegarde ; toute copie privée créée est conservée.</string>
+    <string name="settings_restore_failed">Sauvegarde invalide ou restauration impossible.</string>
+    <string name="sleep_medications">Médicaments</string>
+    <string name="sleep_add_medication">Ajouter un médicament</string>
+    <string name="sleep_add_intake">Ajouter une prise</string>
+    <string name="sleep_dose">Dosage</string>
+    <string name="sleep_unit">Unité</string>
+    <string name="sleep_deactivate">Désactiver</string>
+    <string name="sleep_edit">Modifier</string>
+    <string name="yes">Oui</string>
+    <string name="no">Non</string>
+    <string name="route_heart_rate_diagnostics">Diagnostic cardio BLE</string>
+    <string name="settings_cardio_section">Cardio</string>
+    <string name="settings_cardio_diagnostics">Diagnostic du capteur cardio</string>
+    <string name="settings_cardio_diagnostics_description">Rechercher et vérifier un capteur Bluetooth Heart Rate Service.</string>
+    <string name="hr_diag_status">État du capteur</string>
+    <string name="hr_diag_idle">Prêt</string>
+    <string name="hr_diag_scanning">Recherche en cours…</string>
+    <string name="hr_diag_connecting">Connexion…</string>
+    <string name="hr_diag_discovering">Découverte des services…</string>
+    <string name="hr_diag_subscribing">Activation des mesures…</string>
+    <string name="hr_diag_receiving">Mesures reçues</string>
+    <string name="hr_diag_disconnected">Déconnecté</string>
+    <string name="hr_diag_error">Erreur BLE</string>
+    <string name="hr_diag_permission_denied">Autorisation Bluetooth refusée.</string>
+    <string name="hr_diag_technical">Diagnostic : %1$s</string>
+    <string name="hr_diag_services">Heart Rate Service : %1$s · mesure : %2$s · batterie : %3$s</string>
+    <string name="hr_diag_bpm">%1$d BPM</string>
+    <string name="hr_diag_measurement_meta">%1$d RR · contact %2$s · énergie %3$s</string>
+    <string name="hr_diag_notifications">Notifications reçues : %1$d</string>
+    <string name="hr_diag_scan_section">Recherche BLE</string>
+    <string name="hr_diag_scan">Rechercher cardio</string>
+    <string name="hr_diag_scan_all">Recherche élargie</string>
+    <string name="hr_diag_scan_description">La recherche cardio dure au maximum 10 secondes. La recherche élargie sert aux capteurs qui n’annoncent pas leur service dans la publicité BLE.</string>
+    <string name="hr_diag_devices">Périphériques BLE</string>
+    <string name="hr_diag_no_devices">Aucun périphérique trouvé pour l’instant.</string>
+    <string name="hr_diag_unnamed_device">Périphérique sans nom</string>
+    <string name="hr_diag_hrs_advertised">Heart Rate annoncé</string>
+    <string name="hr_diag_hrs_not_advertised">Heart Rate non annoncé</string>
+    <string name="hr_diag_device_description">%1$s · %2$d dBm · %3$s</string>
+    <string name="hr_diag_use_sensor">Utiliser ce capteur</string>
+    <string name="heart_rate_service_channel">Capteur cardio</string>
+    <string name="heart_rate_service_title">Trainlog · cardio</string>
+    <string name="heart_rate_service_connecting">Connexion au capteur…</string>
+    <string name="heart_rate_service_reconnecting">Signal cardio en attente…</string>
+    <string name="heart_rate_service_disconnected">Capteur cardio déconnecté</string>
+    <string name="heart_rate_service_bpm">%1$d BPM</string>
+    <string name="heart_rate_a11y_connected">Fréquence cardiaque %1$d BPM, capteur connecté</string>
+    <string name="heart_rate_a11y_connecting">Capteur cardio en connexion</string>
+    <string name="heart_rate_a11y_reconnecting">Signal cardio temporairement perdu, reconnexion en cours</string>
+    <string name="heart_rate_a11y_disconnected">Capteur cardio déconnecté</string>
+    <string name="settings_cardio_configured">Capteur cardio configuré.</string>
+    <string name="settings_cardio_forget">Oublier le capteur</string>
+    <string name="settings_cardio_forget_description">Arrêter la connexion cardio et supprimer le capteur mémorisé.</string>
+    <string name="exercise_timeline_start">Démarrer l’exercice</string>
+    <string name="exercise_timeline_finish">Terminer l’exercice</string>
+    <string name="exercise_timeline_completed">Exercice terminé</string>
+    <string name="exercise_timeline_started">%1$s · démarré</string>
+    <string name="exercise_timeline_finished">%1$s · terminé</string>
+    <string name="exercise_timeline_switch_title">Changer d’exercice ?</string>
+    <string name="exercise_timeline_switch_detail">%1$s est encore en cours. Le terminer maintenant puis démarrer %2$s ?</string>
+    <string name="exercise_timeline_switch_confirm">Terminer et démarrer</string>
+    <string name="exercise_timeline_finalize_title">Un exercice est encore en cours</string>
+    <string name="exercise_timeline_finalize_detail">%1$s est encore actif. Le terminer maintenant puis enregistrer la séance ?</string>
+    <string name="exercise_timeline_finalize_confirm">Terminer et enregistrer</string>
+
+    <string name="sleep_night_capture_title">Saisie nocturne</string>
+    <string name="sleep_no_night_active">Aucune nuit en cours.</string>
+    <string name="sleep_night_in_progress">Nuit en cours · %1$s → %2$s</string>
+    <string name="sleep_quick_bed">🛏 COUCHÉ</string>
+    <string name="sleep_quick_wake">👁 RÉVEIL</string>
+    <string name="sleep_quick_get_up">☀ LEVÉ</string>
+    <string name="sleep_bed_recorded">Couché enregistré.</string>
+    <string name="sleep_wake_recorded">Réveil de 30 minutes enregistré.</string>
+    <string name="sleep_get_up_recorded">Levé enregistré.</string>
+    <string name="sleep_medication_recorded">%1$s enregistré.</string>
+    <string name="sleep_undo">ANNULER</string>
+    <string name="sleep_action_undone">Dernière action annulée.</string>
+    <string name="sleep_undo_unavailable">Annulation impossible : la nuit a déjà changé.</string>
+    <string name="sleep_correct_night">Corriger la nuit</string>
+    <string name="sleep_return_night_mode">Retour à la saisie nocturne</string>
+    <string name="sleep_night_timeline">Chronologie de la nuit</string>
+
+    <string name="sleep_quick_no_active">Aucune nuit en cours.</string>
+    <string name="sleep_quick_already_active">Une nuit est déjà en cours.</string>
+    <string name="sleep_quick_medication_unavailable">Médicament indisponible.</string>
+    <string name="sleep_quick_conflict">La nuit a changé ; rechargez avant de recommencer.</string>
+    <string name="sleep_quick_error">Enregistrement impossible.</string>
+    <string name="session_cardio">Cardio</string>
+    <string name="route_cardio_calibration">Calibration cardio</string>
+    <string name="calibration_explanation">Cette séance mesure votre réponse cardiaque actuelle. L’effort augmente progressivement et vous pouvez arrêter immédiatement à tout moment. Le résultat est enregistré comme un pic de fréquence cardiaque observé, pas comme une FC max médicale.</string>
+    <string name="calibration_start">Démarrer la calibration</string>
+    <string name="calibration_start_description">Créer une séance cardio dédiée, démarrer la capture cardiaque et commencer par l’échauffement.</string>
+    <string name="calibration_latest">Dernière calibration</string>
+    <string name="calibration_current">Calibration en cours</string>
+    <string name="calibration_phase_value">Phase : %1$s</string>
+    <string name="calibration_phase_warmup">Échauffement</string>
+    <string name="calibration_phase_progressive">Montée progressive</string>
+    <string name="calibration_phase_high_effort">Effort élevé</string>
+    <string name="calibration_phase_recovery">Récupération</string>
+    <string name="calibration_phase_completed">Terminée</string>
+    <string name="calibration_phase_aborted">Arrêtée</string>
+    <string name="calibration_peak_value">Pic observé : %1$d BPM</string>
+    <string name="calibration_recovery_value">Récupération +%1$d min : %2$d BPM</string>
+    <string name="calibration_to_progressive">Commencer la montée progressive</string>
+    <string name="calibration_progressive_description">Augmenter progressivement l’effort sans chercher à battre une ancienne valeur.</string>
+    <string name="calibration_to_high_effort">Passer à l’effort élevé</string>
+    <string name="calibration_high_effort_description">Continuer seulement tant que vous choisissez de tolérer l’effort. Le bouton suivant arrête immédiatement la phase d’effort.</string>
+    <string name="calibration_end_effort">Arrêter l’effort</string>
+    <string name="calibration_end_effort_description">Marquer la fin de l’effort et commencer la récupération mesurée.</string>
+    <string name="calibration_finish">Terminer la calibration</string>
+    <string name="calibration_finish_description">Fermer la récupération et enregistrer le profil de calibration.</string>
+    <string name="calibration_abort">Arrêter la calibration</string>
+    <string name="calibration_conflict">Une autre séance ou calibration est déjà en cours.</string>
+    <string name="cardio_guidance_title">Guidage cardio</string>
+    <string name="cardio_guidance_phase_value">Phase : %1$s</string>
+    <string name="cardio_guidance_target_value">Cible : %1$d–%2$d BPM</string>
+    <string name="cardio_guidance_calibration_value">Calibration : pic observé %1$d BPM · %2$d–%3$d %%</string>
+    <string name="cardio_guidance_latest_calibration">Dernière calibration : pic observé %1$d BPM</string>
+    <string name="cardio_guidance_resolved_target">Cible utilisée : %1$d–%2$d BPM</string>
+    <string name="cardio_guidance_accelerate">ACCÉLÈRE</string>
+    <string name="cardio_guidance_maintain">MAINTIENS</string>
+    <string name="cardio_guidance_slow_down">RALENTIS</string>
+    <string name="cardio_guidance_suspended">SIGNAL CARDIO INDISPONIBLE</string>
+    <string name="cardio_guidance_bpm_value">%1$d BPM</string>
+    <string name="cardio_guidance_bpm_missing">-- BPM</string>
+    <string name="cardio_guidance_start_phase">Démarrer la phase</string>
+    <string name="cardio_guidance_finish_phase">Terminer la phase</string>
+    <string name="cardio_guidance_invalid_configuration">Complète la cible et la condition de fin.</string>
+    <string name="cardio_guidance_start_failed">Impossible de démarrer cette phase.</string>
+    <string name="cardio_phase_warmup">Échauffement</string>
+    <string name="cardio_phase_work">Travail</string>
+    <string name="cardio_phase_recovery">Récupération</string>
+    <string name="cardio_phase_cooldown">Retour au calme</string>
+    <string name="cardio_target_absolute">BPM</string>
+    <string name="cardio_target_calibration">%% calibration</string>
+    <string name="cardio_target_min_bpm">BPM min</string>
+    <string name="cardio_target_max_bpm">BPM max</string>
+    <string name="cardio_target_min_percent">%% min</string>
+    <string name="cardio_target_max_percent">%% max</string>
+    <string name="cardio_exit_duration">Durée</string>
+    <string name="cardio_exit_target">Entrée dans la cible</string>
+    <string name="cardio_exit_recover">Sous un seuil</string>
+    <string name="cardio_exit_bounded">Durée ou seuil</string>
+    <string name="cardio_exit_seconds">Durée max</string>
+    <string name="cardio_exit_recovery_bpm">Seuil de récupération</string>
 </resources>

android/app/src/test/java/com/labfytools/trainlog/data/AiSessionDraftRepositoryTest.kt

@@ -62,6 +62,41 @@ class AiSessionDraftRepositoryTest {
         assertTrue(repository.listSessions().isEmpty())
     }
 
+    @Test
+    fun desktopWithdrawalTombstonePreventsLegacyReplay() {
+        val exercise = exercise()
+        val legacyArtifact = artifact(exercise.exerciseId)
+        assertEquals(
+            AiSessionDraftImportResult.Applied(1, 0),
+            repository.applyAiSessionDraftsJson(legacyArtifact),
+        )
+        val withdrawalArtifact = JSONObject()
+            .put("format", "trainlog-ai-session-drafts")
+            .put("version", 2)
+            .put("generated_at", "2026-09-18T12:01:00Z")
+            .put("drafts", JSONArray())
+            .put(
+                "withdrawals",
+                JSONArray().put(
+                    JSONObject()
+                        .put("draft_id", DRAFT_ID)
+                        .put("withdrawn_at", "2026-09-18T12:00:00Z"),
+                ),
+            )
+            .toString()
+
+        assertTrue(
+            repository.applyAiSessionDraftsJson(withdrawalArtifact) is
+                AiSessionDraftImportResult.Applied,
+        )
+        assertTrue(repository.listAiSessionDrafts().isEmpty())
+        assertEquals(
+            AiSessionDraftImportResult.Applied(0, 1),
+            repository.applyAiSessionDraftsJson(legacyArtifact),
+        )
+        assertTrue(repository.listAiSessionDrafts().isEmpty())
+    }
+
     @Test
     fun pendingDraftIsListed() {
         val exercise = exercise()

android/app/src/test/java/com/labfytools/trainlog/data/AndroidBackupServiceTest.kt

@@ -0,0 +1,122 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionDraftForm
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionSetDraft
+import com.labfytools.trainlog.model.TrackingMode
+import java.io.ByteArrayInputStream
+import java.io.ByteArrayOutputStream
+import java.util.UUID
+import java.util.zip.ZipInputStream
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidBackupServiceTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun manifestUsesInjectedCanonicalProductVersion() {
+        val name = "backup-version-${UUID.randomUUID()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            val output = ByteArrayOutputStream()
+            val service = AndroidBackupService(context, "0.1.3-test")
+            assertTrue(service.create(repository, output) is AndroidBackupResult.Success)
+            var manifest: JSONObject? = null
+            ZipInputStream(ByteArrayInputStream(output.toByteArray())).use { zip ->
+                while (true) {
+                    val entry = zip.nextEntry ?: break
+                    if (entry.name == "manifest.json") {
+                        manifest = JSONObject(zip.readBytes().toString(Charsets.UTF_8))
+                    }
+                }
+            }
+            assertEquals("0.1.3-test", checkNotNull(manifest).getString("product_version"))
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun completeBackupRestoresDraftPeerLedgersAndPreferences() {
+        val name = "backup-${UUID.randomUUID()}.db"
+        var repository = TrainlogRepository(context, name)
+        val service = AndroidBackupService(context)
+        try {
+            val exercise =
+                (repository.createExercise(
+                        NewExerciseProfile(
+                            "Backup exercise",
+                            RecordingMode.SETS,
+                            TrackingMode.REPS,
+                            0,
+                        )
+                    ) as CreateExerciseResult.Created)
+                    .exercise
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    ActiveSessionDraft(
+                        exercises =
+                            listOf(
+                                SessionExerciseDraft(
+                                    exercise = exercise,
+                                    sets = listOf(SessionSetDraft(reps = 9, weightKg = 31.5)),
+                                )
+                            ),
+                        form = SessionDraftForm(selectedExercise = exercise, weightText = "31,"),
+                    )
+                ),
+            )
+            val peer = SyncGenerationService(repository).peerId()
+            context
+                .getSharedPreferences("trainlog_presentation_settings", Context.MODE_PRIVATE)
+                .edit()
+                .putString("language", "en")
+                .commit()
+            val output = ByteArrayOutputStream()
+            assertTrue(service.create(repository, output) is AndroidBackupResult.Success)
+            val verified = service.verify(ByteArrayInputStream(output.toByteArray())).getOrThrow()
+            assertTrue(service.restore(repository, verified, name) is AndroidBackupResult.Success)
+            repository = TrainlogRepository(context, name)
+            val draft = repository.loadActiveSessionDraft()
+            assertTrue(draft is ActiveDraftLoadResult.Loaded)
+            assertEquals("31,", (draft as ActiveDraftLoadResult.Loaded).draft.form.weightText)
+            assertEquals(peer, SyncGenerationService(repository).peerId())
+            assertEquals(
+                "en",
+                context
+                    .getSharedPreferences("trainlog_presentation_settings", Context.MODE_PRIVATE)
+                    .getString("language", null),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun corruptAndTraversalContainersAreRejectedBeforeRestore() {
+        val service = AndroidBackupService(context)
+        val output = ByteArrayOutputStream()
+        java.util.zip.ZipOutputStream(output).use { zip ->
+            zip.putNextEntry(java.util.zip.ZipEntry("../database.sqlite"))
+            zip.write(byteArrayOf(1))
+            zip.closeEntry()
+        }
+        assertTrue(service.verify(ByteArrayInputStream(output.toByteArray())).isFailure)
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV10PlanningMigrationTest.kt

@@ -66,7 +66,7 @@ class AndroidV10PlanningMigrationTest {
 
         TrainlogRepository(context, name).useForTest { it.listSessions() }
         SQLiteDatabase.openDatabase(path.path, null, SQLiteDatabase.OPEN_READONLY).use { db ->
-            assertEquals(17, scalar(db, "PRAGMA user_version"))
+            assertEquals(33, scalar(db, "PRAGMA user_version"))
             for (table in listOf("session_exercises", "draft_session_exercises")) {
                 assertEquals(6, scalar(db, "SELECT COUNT(*) FROM pragma_table_info('$table') WHERE name IN ('load_mode','rest_seconds','target_sets','target_reps','target_duration_seconds','target_weight_kg')"))
                 assertEquals(0, scalar(db, "SELECT COUNT(*) FROM $table WHERE load_mode<>'none' OR rest_seconds<>0 OR target_sets IS NOT NULL OR target_reps IS NOT NULL OR target_duration_seconds IS NOT NULL OR target_weight_kg IS NOT NULL"))

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV11ExerciseAliasMigrationTest.kt

@@ -69,7 +69,7 @@ class AndroidV11ExerciseAliasMigrationTest {
             migrated.close()
         }
         SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READONLY).use { db ->
-            assertEquals(17, scalar(db, "PRAGMA user_version"))
+            assertEquals(33, scalar(db, "PRAGMA user_version"))
             /* v13 intentionally adds the frozen machine identities and
              * exercise-owned metadata; all non-exercise facts stay exact. */
             val after = snapshot(db).filterKeys { it !in setOf("exercise_aliases", "exercise_profile_state", "exercise_profile_revisions") }

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV16AiSessionDraftMigrationTest.kt

@@ -78,7 +78,7 @@ class AndroidV16AiSessionDraftMigrationTest {
             migrated.close()
         }
         SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READONLY).use { db ->
-            assertEquals(17, scalar(db, "PRAGMA user_version"))
+            assertEquals(33, scalar(db, "PRAGMA user_version"))
             assertEquals(before, listOf(
                 scalar(db, "SELECT COUNT(*) FROM sessions"),
                 scalar(db, "SELECT COUNT(*) FROM performed_sets"),

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV25ProgramExecutionMigrationTest.kt

@@ -0,0 +1,93 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionExercisePlan
+import com.labfytools.trainlog.model.TrackingMode
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+/** Additive v24 -> v25 provenance migration preserves the singleton draft. */
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidV25ProgramExecutionMigrationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun v24FixturePreservesDraftAndInventsNoProgramProvenance() {
+        val name = "program-execution-v24-${UUID.randomUUID()}.db"
+        val first = TrainlogRepository(context, name)
+        val exercise = (
+            first.createExercise(
+                NewExerciseProfile(
+                    "Migration fixture",
+                    RecordingMode.SETS,
+                    TrackingMode.REPS,
+                    0,
+                ),
+            ) as CreateExerciseResult.Created
+        ).exercise
+        assertEquals(
+            ActiveDraftMutationResult.Saved,
+            first.saveActiveSessionDraft(
+                ActiveSessionDraft(
+                    exercises = listOf(
+                        SessionExerciseDraft(
+                            exercise = exercise,
+                            plan = SessionExercisePlan(sets = 3, reps = 8),
+                        ),
+                    ),
+                ),
+            ),
+        )
+        first.close()
+
+        val path = context.getDatabasePath(name).path
+        SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READWRITE).use { db ->
+            /* The published-unreleased fixture may already contain additive
+             * columns; lowering only user_version proves migration replay is safe. */
+            db.execSQL("PRAGMA user_version=24")
+        }
+
+        val reopened = TrainlogRepository(context, name)
+        try {
+            val draft = (reopened.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            assertEquals(null, draft.sourceProgramId)
+            assertEquals(null, draft.sourceProgramSessionId)
+        } finally {
+            reopened.close()
+        }
+        SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READONLY).use { db ->
+            assertEquals(33, scalar(db, "PRAGMA user_version"))
+            assertEquals(0, scalar(db, "SELECT COUNT(*) FROM sessions WHERE source_program_id IS NOT NULL"))
+            assertEquals("ok", text(db, "PRAGMA integrity_check"))
+            db.rawQuery("PRAGMA foreign_key_check", null).use { cursor ->
+                assertFalse(cursor.moveToFirst())
+            }
+        }
+        context.deleteDatabase(name)
+    }
+
+    private fun scalar(db: SQLiteDatabase, sql: String): Int =
+        db.rawQuery(sql, null).use { cursor ->
+            assertTrue(cursor.moveToFirst())
+            cursor.getInt(0)
+        }
+
+    private fun text(db: SQLiteDatabase, sql: String): String =
+        db.rawQuery(sql, null).use { cursor ->
+            assertTrue(cursor.moveToFirst())
+            cursor.getString(0)
+        }
+}

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV26SleepMigrationTest.kt

@@ -0,0 +1,50 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidV26SleepMigrationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun v25AddsEmptySleepDomainAndReopens() {
+        val name = "sleep-v25-${UUID.randomUUID()}.db"
+        TrainlogRepository(context, name).useForTest { assertTrueEmpty(it) }
+        SQLiteDatabase.openDatabase(context.getDatabasePath(name).path, null, SQLiteDatabase.OPEN_READWRITE).use { db ->
+            db.execSQL("DROP TABLE sleep_diary_events")
+            db.execSQL("DROP TABLE sleep_diary_revisions")
+            db.execSQL("DROP TABLE sleep_diary_entries")
+            db.version = 25
+        }
+        var repository = TrainlogRepository(context, name)
+        try {
+            assertTrueEmpty(repository)
+            repository.close()
+            repository = TrainlogRepository(context, name)
+            assertTrueEmpty(repository)
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { assertEquals(33, it.version) }
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    private fun assertTrueEmpty(repository: TrainlogRepository) = assertEquals(emptyList<Any>(), repository.listSleepDiary())
+
+    private fun TrainlogRepository.useForTest(block: (TrainlogRepository) -> Unit) {
+        try { block(this) } finally { close() }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV27HeartRateMigrationTest.kt

@@ -0,0 +1,54 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import java.util.UUID
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidV27HeartRateMigrationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun v26AddsEmptyHeartRateDomainAndReopens() {
+        val name = "heart-rate-v26-${UUID.randomUUID()}.db"
+        TrainlogRepository(context, name).also {
+            JSONObject(it.buildHeartRateV1Json())
+            it.close()
+        }
+        SQLiteDatabase.openDatabase(
+            context.getDatabasePath(name).path,
+            null,
+            SQLiteDatabase.OPEN_READWRITE,
+        ).use { db ->
+            db.execSQL("DROP TABLE heart_rate_generation_captures")
+            db.execSQL("DROP TABLE heart_rate_rr_intervals")
+            db.execSQL("DROP TABLE heart_rate_samples")
+            db.execSQL("DROP TABLE heart_rate_captures")
+            db.version = 26
+        }
+
+        var repository = TrainlogRepository(context, name)
+        try {
+            assertEquals(0, JSONObject(repository.buildHeartRateV1Json())
+                .getJSONArray("captures").length())
+            repository.close()
+            repository = TrainlogRepository(context, name)
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { assertEquals(33, it.version) }
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV28SessionTimelineMigrationTest.kt

@@ -0,0 +1,105 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionSetDraft
+import com.labfytools.trainlog.model.TrackingMode
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidV28SessionTimelineMigrationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun v27SeedsOnlyAuthoritativeActiveSessionBoundary() {
+        val name = "timeline-v27-${UUID.randomUUID()}.db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.startActiveSessionDraft(),
+            )
+            val exercise =
+                (repository.createExercise(
+                    NewExerciseProfile(
+                        "Timeline migration exercise",
+                        RecordingMode.SETS,
+                        TrackingMode.REPS,
+                        0,
+                    ),
+                ) as CreateExerciseResult.Created).exercise
+            val loaded =
+                repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            val sessionId = checkNotNull(loaded.draft.sessionId)
+            val startedAt = checkNotNull(loaded.draft.startedAt)
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    loaded.draft.copy(
+                        exercises =
+                            listOf(
+                                SessionExerciseDraft(
+                                    exercise = exercise,
+                                    sets = listOf(SessionSetDraft(reps = 1)),
+                                ),
+                            ),
+                    ),
+                ),
+            )
+            repository.close()
+
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READWRITE,
+            ).use { db ->
+                db.execSQL("DROP TABLE session_timeline_generation_sessions")
+                db.execSQL("DROP TABLE session_timeline_exercises")
+                db.execSQL("DROP TABLE session_timeline_sessions")
+                db.version = 27
+            }
+
+            repository = TrainlogRepository(context, name)
+            assertNotNull(repository.activeSessionTimelineContext())
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { db ->
+                assertEquals(33, db.version)
+                db.rawQuery(
+                    "SELECT session_id,started_at,ended_at FROM session_timeline_sessions",
+                    null,
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(sessionId, cursor.getString(0))
+                    assertEquals(startedAt, cursor.getString(1))
+                    assertTrue(cursor.isNull(2))
+                }
+                db.rawQuery(
+                    "SELECT COUNT(*) FROM session_timeline_exercises",
+                    null,
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(0, cursor.getInt(0))
+                }
+            }
+            assertNotNull(repository.activeSessionTimelineContext())
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV29CardioSessionMigrationTest.kt

@@ -0,0 +1,108 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionDraft
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionSetDraft
+import com.labfytools.trainlog.model.TrackingMode
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidV29CardioSessionMigrationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun v28BackfillsCanonicalSessionKindFromFrozenLegacyType() {
+        val name = "cardio-v28-" + UUID.randomUUID() + ".db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            val exercise =
+                (repository.createExercise(
+                    NewExerciseProfile(
+                        "Cardio migration exercise",
+                        RecordingMode.SETS,
+                        TrackingMode.REPS,
+                        0,
+                    ),
+                ) as CreateExerciseResult.Created).exercise
+            assertTrue(
+                repository.saveSession(
+                    SessionDraft(
+                        listOf(
+                            SessionExerciseDraft(
+                                exercise = exercise,
+                                sets = listOf(SessionSetDraft(reps = 5)),
+                            ),
+                        ),
+                    ),
+                ) is SaveSessionResult.Saved,
+            )
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    ActiveSessionDraft(
+                        exercises =
+                            listOf(
+                                SessionExerciseDraft(
+                                    exercise = exercise,
+                                    sets = listOf(SessionSetDraft(reps = 6)),
+                                ),
+                            ),
+                    ),
+                ),
+            )
+            repository.close()
+
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READWRITE,
+            ).use { db ->
+                db.execSQL("UPDATE sessions SET session_kind='cardio'")
+                db.execSQL("UPDATE active_session_draft SET session_kind='cardio'")
+                db.version = 28
+            }
+
+            repository = TrainlogRepository(context, name)
+            assertEquals(1, repository.listSessions().size)
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { db ->
+                assertEquals(33, db.version)
+                db.rawQuery(
+                    "SELECT session_type,session_kind FROM sessions",
+                    null,
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals("training", cursor.getString(0))
+                    assertEquals("training", cursor.getString(1))
+                }
+                db.rawQuery(
+                    "SELECT session_type,session_kind FROM active_session_draft WHERE id=1",
+                    null,
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals("training", cursor.getString(0))
+                    assertEquals("training", cursor.getString(1))
+                }
+            }
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV30CardioCalibrationMigrationTest.kt

@@ -0,0 +1,69 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidV30CardioCalibrationMigrationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun v29AddsEmptyCalibrationDomainAndReservedExercise() {
+        val name = "calibration-v29-" + UUID.randomUUID() + ".db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            repository.listExercises()
+            repository.close()
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READWRITE,
+            ).use { db ->
+                db.execSQL("DROP TABLE cardio_calibration_generation")
+                db.execSQL("DROP TABLE cardio_calibration_recovery")
+                db.execSQL("DROP TABLE cardio_calibrations")
+                db.version = 29
+            }
+
+            repository = TrainlogRepository(context, name)
+            assertTrue(repository.listExercises().none { it.name == "Calibration cardio" })
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { db ->
+                assertEquals(33, db.version)
+                db.rawQuery(
+                    "SELECT COUNT(*) FROM exercises WHERE " +
+                        "exercise_id='ex_ca1b4a7e-1c2d-4f00-8a11-000000000001' " +
+                        "AND name='Calibration cardio'",
+                    null,
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(1, cursor.getInt(0))
+                }
+                db.rawQuery(
+                    "SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name IN(" +
+                        "'cardio_calibrations','cardio_calibration_recovery'," +
+                        "'cardio_calibration_generation')",
+                    null,
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(3, cursor.getInt(0))
+                }
+            }
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV31CardioGuidanceMigrationTest.kt

@@ -0,0 +1,65 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidV31CardioGuidanceMigrationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun v30AddsEmptyGuidanceDomainAndReopens() {
+        val name = "guidance-v30-" + UUID.randomUUID() + ".db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            repository.listSessions()
+            repository.close()
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READWRITE,
+            ).use { db ->
+                db.execSQL("DROP TABLE cardio_guidance_generation")
+                db.execSQL("DROP TABLE cardio_guidance_events")
+                db.execSQL("DROP TABLE cardio_guidance_phases")
+                db.execSQL("DROP TABLE cardio_guidance_runs")
+                db.version = 30
+            }
+
+            repository = TrainlogRepository(context, name)
+            assertTrue(repository.activeCardioGuidancePhase() == null)
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { db ->
+                assertEquals(33, db.version)
+                db.rawQuery(
+                    "SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name IN(" +
+                        "'cardio_guidance_runs','cardio_guidance_phases'," +
+                        "'cardio_guidance_events','cardio_guidance_generation')",
+                    null,
+                ).use { c ->
+                    assertTrue(c.moveToFirst())
+                    assertEquals(4, c.getInt(0))
+                }
+                db.rawQuery("SELECT COUNT(*) FROM cardio_guidance_runs", null).use { c ->
+                    assertTrue(c.moveToFirst())
+                    assertEquals(0, c.getInt(0))
+                }
+            }
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/AndroidV32SleepQuantityMigrationTest.kt

@@ -0,0 +1,96 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.SleepMedication
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class AndroidV32SleepQuantityMigrationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun v31IntakesHydrateToOneAndQuickPublicationStartsEmpty() {
+        val name = "sleep-quantity-v31-${UUID.randomUUID()}.db"
+        val initial = TrainlogRepository(context, name)
+        try {
+            val saved = initial.saveSleepMedication(
+                SleepMedication(
+                    "", "", "2026-09-23T20:00:00+02:00", "2026-09-23T20:00:00+02:00",
+                    "Migration medication", 75.0, "mg", "", "", true,
+                ),
+            ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            initial.quickSleepMedication(saved.entryId, "2026-09-23T21:00:00+02:00")
+        } finally {
+            initial.close()
+        }
+        val path = context.getDatabasePath(name).path
+        SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READWRITE).use { db ->
+            db.execSQL("PRAGMA foreign_keys=OFF")
+            db.execSQL("DROP TABLE sleep_diary_quick_publication_state")
+            db.execSQL("ALTER TABLE sleep_medication_intakes RENAME TO sleep_medication_intakes_v32")
+            db.execSQL(
+                """CREATE TABLE sleep_medication_intakes(
+                    revision_id TEXT NOT NULL, intake_id TEXT NOT NULL,
+                    medication_id TEXT NOT NULL, medication_name TEXT NOT NULL,
+                    taken_at TEXT NOT NULL, dose_value REAL, dose_unit TEXT,
+                    note TEXT, created_at TEXT NOT NULL,
+                    PRIMARY KEY(revision_id,intake_id)
+                )""".trimIndent(),
+            )
+            db.execSQL(
+                "INSERT INTO sleep_medication_intakes SELECT revision_id,intake_id,medication_id," +
+                    "medication_name,taken_at,dose_value,dose_unit,note,created_at " +
+                    "FROM sleep_medication_intakes_v32",
+            )
+            db.execSQL("DROP TABLE sleep_medication_intakes_v32")
+            db.execSQL("PRAGMA user_version=31")
+        }
+
+        val migrated = TrainlogRepository(context, name)
+        migrated.listSleepDiary()
+        migrated.close()
+        SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READONLY).use { db ->
+            assertEquals(33, scalar(db, "PRAGMA user_version"))
+            assertEquals(
+                1,
+                scalar(
+                    db,
+                    "SELECT COUNT(*) FROM pragma_table_info('sleep_medication_intakes') " +
+                        "WHERE name='quantity' AND \"notnull\"=1 AND dflt_value='1'",
+                ),
+            )
+            assertEquals(1, scalar(db, "SELECT quantity FROM sleep_medication_intakes"))
+            assertEquals(
+                1,
+                scalar(
+                    db,
+                    "SELECT COUNT(*) FROM sqlite_master WHERE type='table' " +
+                        "AND name='sleep_diary_quick_publication_state'",
+                ),
+            )
+            assertEquals("ok", text(db, "PRAGMA integrity_check"))
+        }
+        context.deleteDatabase(name)
+    }
+
+    private fun scalar(db: SQLiteDatabase, sql: String): Int =
+        db.rawQuery(sql, null).use { cursor ->
+            assertTrue(cursor.moveToFirst())
+            cursor.getInt(0)
+        }
+
+    private fun text(db: SQLiteDatabase, sql: String): String =
+        db.rawQuery(sql, null).use { cursor ->
+            assertTrue(cursor.moveToFirst())
+            cursor.getString(0)
+        }
+}

android/app/src/test/java/com/labfytools/trainlog/data/BluetoothSyncTransportContractTest.kt

@@ -0,0 +1,38 @@
+package com.labfytools.trainlog.data
+
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class BluetoothSyncTransportContractTest {
+    @Test
+    fun connectedPeerStartsAutoSyncWithoutUserActionButHonorsCooldown() {
+        assertTrue(
+            shouldPublishBluetoothArrivalRequest(
+                autoSyncEnabled = true,
+                cooldownReady = true,
+            )
+        )
+        assertFalse(
+            shouldPublishBluetoothArrivalRequest(
+                autoSyncEnabled = false,
+                cooldownReady = true,
+            )
+        )
+        assertFalse(
+            shouldPublishBluetoothArrivalRequest(
+                autoSyncEnabled = true,
+                cooldownReady = false,
+            )
+        )
+    }
+
+    @Test
+    fun androidPullArchiveCarriesGenerationAckRecoveryEvidence() {
+        assertTrue(
+            BLUETOOTH_ANDROID_PULL_COORDINATION.contains(
+                "android-archive-acknowledgements-v1.json"
+            )
+        )
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/BodyZonesTest.kt

@@ -328,7 +328,7 @@ class BodyZonesTest {
         SQLiteDatabase.openDatabase(context.getDatabasePath(name).path, null,
             SQLiteDatabase.OPEN_READONLY).use { db ->
             db.rawQuery("PRAGMA user_version", null).use { cursor ->
-                assertTrue(cursor.moveToFirst()); assertEquals(17, cursor.getInt(0))
+                assertTrue(cursor.moveToFirst()); assertEquals(33, cursor.getInt(0))
             }
             db.rawQuery("SELECT id FROM exercises", null).use { cursor ->
                 assertTrue(cursor.moveToFirst()); assertEquals(42L, cursor.getLong(0))

android/app/src/test/java/com/labfytools/trainlog/data/BridgeBackupMigrationTest.kt

@@ -0,0 +1,129 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import java.io.File
+import java.io.FileInputStream
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Assume.assumeTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class BridgeBackupMigrationTest {
+    @Test
+    fun verifiedSchemaSeventeenBridgeBackupMigratesThroughCurrentOwner() {
+        val source = System.getenv("TRAINLOG_BRIDGE_BACKUP_INPUT")?.let(::File)
+        assumeTrue(source?.isFile == true)
+        val context: Context = ApplicationProvider.getApplicationContext()
+        val name = "bridge-migrate-${UUID.randomUUID()}.db"
+        val service = AndroidBackupService(context)
+        var repository = TrainlogRepository(context, name)
+        try {
+            val verified = FileInputStream(source!!).use { service.verify(it).getOrThrow() }
+            val historical = historicalDump(verified.database)
+            val activeDraft = historical.entries.single { it.key.startsWith("active_session_draft|") }
+            val hadActiveDraft = activeDraft.value.isNotEmpty()
+            assertTrue(service.restore(repository, verified, name) is AndroidBackupResult.Success)
+            repository = TrainlogRepository(context, name)
+            assertEquals(
+                hadActiveDraft,
+                repository.loadActiveSessionDraft() is ActiveDraftLoadResult.Loaded,
+            )
+            val migrated = context.getDatabasePath(name)
+            assertEquals(historical, historicalDump(migrated, historical.keys))
+            SQLiteDatabase.openDatabase(
+                    migrated.path,
+                    null,
+                    android.database.sqlite.SQLiteDatabase.OPEN_READONLY,
+                )
+                .use { assertEquals(31, it.version) }
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    /**
+     * CONTRACT: every pre-migration column and value is compared exactly;
+     * additive v18-v20 tables/columns are outside the historical shape.
+     * INVARIANT: the supplied archive is opened read-only and only the
+     * test-owned restored database is migrated.
+     */
+    private fun historicalDump(
+        databasePath: File,
+        shape: Set<String>? = null,
+    ): Map<String, List<List<String>>> =
+        SQLiteDatabase.openDatabase(
+                databasePath.path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            )
+            .use { database ->
+                val tables =
+                    database
+                        .rawQuery(
+                            "SELECT name FROM sqlite_master WHERE type='table' " +
+                                "AND name NOT LIKE 'sqlite_%' AND name<>'android_metadata' " +
+                                "ORDER BY name;",
+                            null,
+                        )
+                        .use { cursor ->
+                            buildList {
+                                while (cursor.moveToNext()) add(cursor.getString(0))
+                            }
+                        }
+                val specifications =
+                    shape
+                        ?: tables
+                            .map { table ->
+                                val columns =
+                                    database.rawQuery("PRAGMA table_info(`$table`);", null).use {
+                                        cursor ->
+                                        buildList {
+                                            while (cursor.moveToNext()) add(cursor.getString(1))
+                                        }
+                                    }
+                                "$table|${columns.joinToString(",")}"
+                            }
+                            .toSet()
+                specifications.associateWith { specification ->
+                    val table = specification.substringBefore('|')
+                    val columns = specification.substringAfter('|').split(',')
+                    val selection = columns.joinToString(",") { "`$it`" }
+                    database
+                        .rawQuery(
+                            "SELECT $selection FROM `$table` ORDER BY rowid;",
+                            null,
+                        )
+                        .use { cursor ->
+                            buildList {
+                                while (cursor.moveToNext()) {
+                                    add(
+                                        (0 until cursor.columnCount).map { column ->
+                                            when (cursor.getType(column)) {
+                                                android.database.Cursor.FIELD_TYPE_NULL -> "null"
+                                                android.database.Cursor.FIELD_TYPE_INTEGER ->
+                                                    "integer:${cursor.getLong(column)}"
+                                                android.database.Cursor.FIELD_TYPE_FLOAT ->
+                                                    "float:${java.lang.Double.toHexString(cursor.getDouble(column))}"
+                                                android.database.Cursor.FIELD_TYPE_STRING ->
+                                                    "string:${cursor.getString(column)}"
+                                                android.database.Cursor.FIELD_TYPE_BLOB ->
+                                                    "blob:${cursor.getBlob(column).contentToString()}"
+                                                else -> error("Unknown SQLite field type")
+                                            }
+                                        }
+                                    )
+                                }
+                            }
+                        }
+                }
+            }
+}

android/app/src/test/java/com/labfytools/trainlog/data/CardioCalibrationRepositoryTest.kt

@@ -0,0 +1,187 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.CardioCalibrationPhase
+import com.labfytools.trainlog.model.SessionType
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class CardioCalibrationRepositoryTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    private fun measurement(bpm: Int) =
+        ParsedHeartRateMeasurement(
+            bpm = bpm,
+            sensorContactDetected = null,
+            energyExpended = null,
+            rrIntervals1024 = listOf(1024),
+        )
+
+    @Test
+    fun calibrationTracksObservedPeakRecoveryAndFinalizesRealCardioSession() {
+        val name = "calibration-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            val started =
+                repository.startCardioCalibration("2026-09-23T10:00:00+02:00")
+                    as TrainlogRepository.CardioCalibrationResult.Applied
+            assertEquals(CardioCalibrationPhase.WARMUP, started.profile.phase)
+
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T10:00:10+02:00",
+                measurement(80),
+            )
+            assertEquals(
+                CardioCalibrationPhase.PROGRESSIVE,
+                (repository.advanceCardioCalibrationPhase("2026-09-23T10:01:00+02:00")
+                    as TrainlogRepository.CardioCalibrationResult.Applied).profile.phase,
+            )
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T10:01:20+02:00",
+                measurement(112),
+            )
+            assertEquals(
+                CardioCalibrationPhase.HIGH_EFFORT,
+                (repository.advanceCardioCalibrationPhase("2026-09-23T10:02:00+02:00")
+                    as TrainlogRepository.CardioCalibrationResult.Applied).profile.phase,
+            )
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T10:02:30+02:00",
+                measurement(150),
+            )
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T10:03:00+02:00",
+                measurement(160),
+            )
+
+            val recovery =
+                repository.markCardioCalibrationEffortEnd("2026-09-23T10:03:01+02:00")
+                    as TrainlogRepository.CardioCalibrationResult.Applied
+            assertEquals(CardioCalibrationPhase.RECOVERY, recovery.profile.phase)
+            assertEquals(160, recovery.profile.observedPeakBpm)
+            assertTrue(recovery.profile.heartRateCaptureId != null)
+
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T10:04:01+02:00",
+                measurement(140),
+            )
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T10:05:02+02:00",
+                measurement(120),
+            )
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T10:06:01+02:00",
+                measurement(100),
+            )
+
+            val completed =
+                repository.finishCardioCalibration("2026-09-23T10:06:10+02:00")
+                    as TrainlogRepository.CardioCalibrationResult.Applied
+            assertEquals(CardioCalibrationPhase.COMPLETED, completed.profile.phase)
+            assertEquals(
+                listOf(60 to 140, 120 to 120, 180 to 100),
+                completed.profile.recovery.map { it.targetOffsetSeconds to it.bpm },
+            )
+            assertNull(repository.activeCardioCalibration())
+            assertNull(repository.activeHeartRateCapture())
+
+            val session = repository.listSessions().single()
+            assertEquals(SessionType.CARDIO, session.sessionType)
+            val detail = checkNotNull(repository.getSessionDetail(session.sessionId))
+            assertEquals(370, detail.exercises.single().continuousDurationSeconds)
+            assertEquals(1, repository.listCompletedCardioCalibrations().size)
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun recoveryDoesNotInventLateReferencePointsAndCannotFinishTooEarly() {
+        val name = "calibration-recovery-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            repository.startCardioCalibration("2026-09-23T12:00:00+02:00")
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T12:00:10+02:00",
+                measurement(80),
+            )
+            repository.advanceCardioCalibrationPhase("2026-09-23T12:01:00+02:00")
+            repository.advanceCardioCalibrationPhase("2026-09-23T12:02:00+02:00")
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T12:02:30+02:00",
+                measurement(155),
+            )
+            repository.markCardioCalibrationEffortEnd("2026-09-23T12:03:00+02:00")
+
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T12:05:05+02:00",
+                measurement(118),
+            )
+            val duringRecovery = checkNotNull(repository.activeCardioCalibration())
+            assertEquals(
+                listOf(120 to 118),
+                duringRecovery.recovery.map { it.targetOffsetSeconds to it.bpm },
+            )
+
+            val tooEarly =
+                repository.finishCardioCalibration("2026-09-23T12:05:59+02:00")
+            assertTrue(tooEarly is TrainlogRepository.CardioCalibrationResult.Invalid)
+            assertTrue(repository.activeCardioCalibration() != null)
+
+            repository.recordLiveHeartRateForActiveSession(
+                "CYCPLUS H2",
+                "2026-09-23T12:06:03+02:00",
+                measurement(105),
+            )
+            val completed =
+                repository.finishCardioCalibration("2026-09-23T12:06:05+02:00")
+                    as TrainlogRepository.CardioCalibrationResult.Applied
+            assertEquals(
+                listOf(120 to 118, 180 to 105),
+                completed.profile.recovery.map { it.targetOffsetSeconds to it.bpm },
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun abortBeforeEffortEndNeverCreatesCompletedReference() {
+        val name = "calibration-abort-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            repository.startCardioCalibration("2026-09-23T11:00:00+02:00")
+            val aborted =
+                repository.abortCardioCalibration("2026-09-23T11:01:00+02:00")
+                    as TrainlogRepository.CardioCalibrationResult.Applied
+            assertEquals(CardioCalibrationPhase.ABORTED, aborted.profile.phase)
+            assertNull(aborted.profile.effortEndAt)
+            assertTrue(repository.loadActiveSessionDraft() is ActiveDraftLoadResult.None)
+            assertTrue(repository.listCompletedCardioCalibrations().isEmpty())
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/CardioGuidanceEngineTest.kt

@@ -0,0 +1,147 @@
+package com.labfytools.trainlog.data
+
+import com.labfytools.trainlog.model.CardioGuidanceInstruction
+import com.labfytools.trainlog.model.CardioTargetDefinition
+import com.labfytools.trainlog.model.CardioTargetSnapshot
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class CardioGuidanceEngineTest {
+    private val target = CardioTargetSnapshot(120, 140)
+
+    @Test
+    fun absoluteAndCalibrationTargetsResolveToImmutableBpmSnapshot() {
+        assertEquals(
+            CardioTargetSnapshot(120, 140),
+            CardioTargetResolver.resolve(CardioTargetDefinition.AbsoluteBpm(120, 140)),
+        )
+        assertEquals(
+            CardioTargetSnapshot(
+                minimumBpm = 100,
+                maximumBpm = 125,
+                calibrationId = "cal_11111111-1111-4111-8111-111111111111",
+                calibrationObservedPeakBpm = 167,
+                minimumPercent = 60,
+                maximumPercent = 75,
+            ),
+            CardioTargetResolver.resolve(
+                CardioTargetDefinition.CalibrationPercent(
+                    calibrationId = "cal_11111111-1111-4111-8111-111111111111",
+                    observedPeakBpm = 167,
+                    minimumPercent = 60,
+                    maximumPercent = 75,
+                ),
+            ),
+        )
+    }
+
+    @Test
+    fun invalidTargetDefinitionsAreRejectedInsteadOfClamped() {
+        assertNull(CardioTargetResolver.resolve(CardioTargetDefinition.AbsoluteBpm(140, 120)))
+        assertNull(
+            CardioTargetResolver.resolve(
+                CardioTargetDefinition.CalibrationPercent("cal_x", 0, 60, 70),
+            ),
+        )
+        assertNull(
+            CardioTargetResolver.resolve(
+                CardioTargetDefinition.CalibrationPercent("cal_x", 160, 80, 60),
+            ),
+        )
+    }
+
+    @Test
+    fun lowBpmMustPersistBeforeAccelerateInstructionChanges() {
+        val engine = CardioGuidanceEngine(hysteresisBpm = 2, confirmationMs = 3_000)
+        assertEquals(
+            CardioGuidanceInstruction.MAINTAIN,
+            engine.evaluate(target, 110, true, 1_000).instruction,
+        )
+        assertEquals(
+            CardioGuidanceInstruction.MAINTAIN,
+            engine.evaluate(target, 111, true, 3_999).instruction,
+        )
+        val changed = engine.evaluate(target, 111, true, 4_000)
+        assertEquals(CardioGuidanceInstruction.ACCELERATE, changed.instruction)
+        assertNull(changed.pendingInstruction)
+    }
+
+    @Test
+    fun highBpmMustPersistBeforeSlowDownInstructionChanges() {
+        val engine = CardioGuidanceEngine(hysteresisBpm = 2, confirmationMs = 2_000)
+        engine.evaluate(target, 150, true, 0)
+        assertEquals(
+            CardioGuidanceInstruction.SLOW_DOWN,
+            engine.evaluate(target, 150, true, 2_000).instruction,
+        )
+    }
+
+    @Test
+    fun hysteresisPreventsBoundaryYoyo() {
+        val engine = CardioGuidanceEngine(hysteresisBpm = 2, confirmationMs = 0)
+        assertEquals(
+            CardioGuidanceInstruction.ACCELERATE,
+            engine.evaluate(target, 117, true, 0).instruction,
+        )
+        // 119 is still below target, but not enough to leave ACCELERATE.
+        assertEquals(
+            CardioGuidanceInstruction.ACCELERATE,
+            engine.evaluate(target, 119, true, 1).instruction,
+        )
+        assertEquals(
+            CardioGuidanceInstruction.MAINTAIN,
+            engine.evaluate(target, 122, true, 2).instruction,
+        )
+        // 141 is just above the zone and remains MAINTAIN within hysteresis.
+        assertEquals(
+            CardioGuidanceInstruction.MAINTAIN,
+            engine.evaluate(target, 141, true, 3).instruction,
+        )
+        assertEquals(
+            CardioGuidanceInstruction.SLOW_DOWN,
+            engine.evaluate(target, 143, true, 4).instruction,
+        )
+    }
+
+    @Test
+    fun isolatedOppositeSampleDoesNotReplaceCurrentInstruction() {
+        val engine = CardioGuidanceEngine(hysteresisBpm = 2, confirmationMs = 3_000)
+        engine.evaluate(target, 110, true, 0)
+        engine.evaluate(target, 110, true, 3_000)
+        assertEquals(
+            CardioGuidanceInstruction.ACCELERATE,
+            engine.evaluate(target, 150, true, 3_100).instruction,
+        )
+        assertEquals(
+            CardioGuidanceInstruction.ACCELERATE,
+            engine.evaluate(target, 112, true, 3_200).instruction,
+        )
+    }
+
+    @Test
+    fun staleOrMissingSignalSuspendsImmediatelyAndNeverUsesOldBpm() {
+        val engine = CardioGuidanceEngine(hysteresisBpm = 2, confirmationMs = 0)
+        assertEquals(
+            CardioGuidanceInstruction.ACCELERATE,
+            engine.evaluate(target, 110, true, 0).instruction,
+        )
+        val stale = engine.evaluate(target, 110, false, 1_000)
+        assertEquals(CardioGuidanceInstruction.SUSPENDED, stale.instruction)
+        assertNull(stale.bpm)
+
+        // A fresh sample must re-establish a candidate from real current data.
+        val resumed = engine.evaluate(target, 130, true, 2_000)
+        assertTrue(resumed.instruction != CardioGuidanceInstruction.SUSPENDED)
+        assertEquals(130, resumed.bpm)
+    }
+
+    @Test
+    fun noTargetSuspendsGuidance() {
+        val engine = CardioGuidanceEngine()
+        val output = engine.evaluate(null, 130, true, 0)
+        assertEquals(CardioGuidanceInstruction.SUSPENDED, output.instruction)
+        assertNull(output.bpm)
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/CardioGuidanceGenerationTest.kt

@@ -0,0 +1,260 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.CardioGuidanceInstruction
+import com.labfytools.trainlog.model.CardioGuidanceOutput
+import com.labfytools.trainlog.model.CardioGuidedPhase
+import com.labfytools.trainlog.model.CardioPhaseExitCondition
+import com.labfytools.trainlog.model.CardioPhaseKind
+import com.labfytools.trainlog.model.CardioTargetSnapshot
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionExercisePlan
+import com.labfytools.trainlog.model.SessionType
+import com.labfytools.trainlog.model.TrackingMode
+import java.nio.file.Files
+import java.time.OffsetDateTime
+import java.util.UUID
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class CardioGuidanceGenerationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    private fun measurement(bpm: Int) =
+        ParsedHeartRateMeasurement(
+            bpm = bpm,
+            sensorContactDetected = null,
+            energyExpended = null,
+            rrIntervals1024 = listOf(1024),
+        )
+
+    @Test
+    fun completedGuidanceSynchronizesOnceAndAckStopsRepublication() {
+        val name = "guidance-generation-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        val root = Files.createTempDirectory("trainlog-guidance-generation-").toFile()
+        try {
+            val exercise =
+                (repository.createExercise(
+                    NewExerciseProfile(
+                        "Vélo guidé sync",
+                        RecordingMode.CONTINUOUS,
+                        TrackingMode.DURATION,
+                        0,
+                    ),
+                ) as CreateExerciseResult.Created).exercise
+
+            val entry =
+                SessionExerciseDraft(
+                    exercise = exercise,
+                    plan = SessionExercisePlan(sets = 0, durationSeconds = 30),
+                )
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    ActiveSessionDraft(
+                        startedAt = OffsetDateTime.now().minusMinutes(1).toString(),
+                        sessionType = SessionType.CARDIO,
+                        exercises = listOf(entry),
+                    ),
+                ),
+            )
+            val active =
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            val base = OffsetDateTime.parse(checkNotNull(active.startedAt))
+            val exerciseStart = base.plusSeconds(1).toString()
+            assertTrue(
+                repository.startActiveSessionExercise(entry.entryId, exerciseStart) is
+                    TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+
+            val target = CardioTargetSnapshot(120, 140)
+            val phase =
+                CardioGuidedPhase(
+                    phaseId = "cgp_" + UUID.randomUUID(),
+                    kind = CardioPhaseKind.WORK,
+                    target = target,
+                    exitCondition = CardioPhaseExitCondition.FixedDuration(30),
+                )
+            assertTrue(
+                repository.startCardioGuidancePhase(
+                    entry.entryId,
+                    phase,
+                    base.plusSeconds(2).toString(),
+                ) is TrainlogRepository.CardioGuidanceMutationResult.Applied,
+            )
+
+            val lowAt = base.plusSeconds(3).toString()
+            repository.recordLiveHeartRateForActiveSession(
+                "Synthetic HR",
+                lowAt,
+                measurement(110),
+            )
+            repository.recordCardioGuidanceOutput(
+                phase.phaseId,
+                lowAt,
+                CardioGuidanceOutput(
+                    CardioGuidanceInstruction.ACCELERATE,
+                    110,
+                    target,
+                ),
+            )
+            val targetAt = base.plusSeconds(4).toString()
+            repository.recordLiveHeartRateForActiveSession(
+                "Synthetic HR",
+                targetAt,
+                measurement(130),
+            )
+            repository.recordCardioGuidanceOutput(
+                phase.phaseId,
+                targetAt,
+                CardioGuidanceOutput(
+                    CardioGuidanceInstruction.MAINTAIN,
+                    130,
+                    target,
+                ),
+            )
+
+            repository.finishCardioGuidancePhase(
+                phase.phaseId,
+                base.plusSeconds(5).toString(),
+            )
+            repository.finishActiveSessionExercise(
+                entry.entryId,
+                base.plusSeconds(6).toString(),
+            )
+            val completedDraft =
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    completedDraft.copy(
+                        exercises =
+                            completedDraft.exercises.map {
+                                if (it.entryId == entry.entryId) {
+                                    it.copy(continuousDurationSeconds = 5)
+                                } else {
+                                    it
+                                }
+                            },
+                    ),
+                ),
+            )
+            assertTrue(repository.finalizeActiveSessionDraft() is FinalizeActiveDraftResult.Saved)
+            assertEquals(
+                1,
+                JSONObject(repository.buildCardioGuidanceV1Json())
+                    .getJSONArray("runs")
+                    .length(),
+            )
+
+            val repositoryRoot =
+                generateSequence(java.io.File(checkNotNull(System.getProperty("user.dir")))) {
+                        it.parentFile
+                    }
+                    .first { java.io.File(it, "tools/sync_generation_exchange.py").isFile }
+            fun run(vararg command: String): String {
+                val process =
+                    ProcessBuilder(*command)
+                        .directory(repositoryRoot)
+                        .redirectErrorStream(true)
+                        .start()
+                val output = process.inputStream.bufferedReader().readText()
+                assertEquals(
+                    "command failed: ${command.joinToString(" ")}\n$output",
+                    0,
+                    process.waitFor(),
+                )
+                return output
+            }
+
+            val desktopDb = java.io.File(root, "desktop.sqlite")
+            run(
+                java.io.File(repositoryRoot, "build/tui/sync-generation-fixture").absolutePath,
+                desktopDb.absolutePath,
+            )
+            val desktopPeer =
+                Regex("PEER_ID=(peer_[^\\s]+)")
+                    .find(
+                        run(
+                            "python3",
+                            java.io.File(
+                                repositoryRoot,
+                                "tools/sync_generation_exchange.py",
+                            ).absolutePath,
+                            "peer-id",
+                            "--database",
+                            desktopDb.absolutePath,
+                        ),
+                    )!!
+                    .groupValues[1]
+
+            val service = SyncGenerationService(repository)
+            val captured = service.capture(root, desktopPeer)
+            assertEquals(
+                1,
+                JSONObject(
+                        java.io.File(
+                            captured.stagingDirectory,
+                            "cardio-guidance-v1.json",
+                        ).readText(),
+                    )
+                    .getJSONArray("runs")
+                    .length(),
+            )
+            val published =
+                service.publish(captured, java.io.File(root, "objects"))
+            val ackFile = java.io.File(root, "ack.json")
+            run(
+                "python3",
+                java.io.File(repositoryRoot, "tools/sync_generation_exchange.py").absolutePath,
+                "consume-desktop",
+                published.absolutePath,
+                "--database",
+                desktopDb.absolutePath,
+                "--ack-output",
+                ackFile.absolutePath,
+            )
+            assertEquals(
+                "consumed",
+                JSONObject(ackFile.readText()).getString("result"),
+            )
+            assertEquals(
+                "acknowledged",
+                service.acceptAcknowledgement(ackFile.readBytes()),
+            )
+            assertEquals(
+                0,
+                JSONObject(repository.buildCardioGuidanceV1Json())
+                    .getJSONArray("runs")
+                    .length(),
+            )
+            assertEquals(
+                "1|1|2",
+                run(
+                        "sqlite3",
+                        desktopDb.absolutePath,
+                        "SELECT (SELECT count(*) FROM cardio_guidance_runs) || '|' || " +
+                            "(SELECT count(*) FROM cardio_guidance_phases) || '|' || " +
+                            "(SELECT count(*) FROM cardio_guidance_events);",
+                    )
+                    .trim(),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+            root.deleteRecursively()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/CardioGuidanceRepositoryTest.kt

@@ -0,0 +1,428 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.CardioGuidanceInstruction
+import com.labfytools.trainlog.model.CardioGuidanceOutput
+import com.labfytools.trainlog.model.CardioGuidedPhase
+import com.labfytools.trainlog.model.CardioPhaseExitCondition
+import com.labfytools.trainlog.model.CardioPhaseKind
+import com.labfytools.trainlog.model.CardioTargetSnapshot
+import com.labfytools.trainlog.model.HeartRateContextKind
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionExercisePlan
+import com.labfytools.trainlog.model.SessionType
+import com.labfytools.trainlog.model.TrackingMode
+import java.time.OffsetDateTime
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class CardioGuidanceRepositoryTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    private data class ActiveCardio(
+        val repository: TrainlogRepository,
+        val databaseName: String,
+        val entryId: String,
+        val exerciseStartedAt: String,
+    ) {
+        fun at(seconds: Long): String =
+            OffsetDateTime.parse(exerciseStartedAt).plusSeconds(seconds).toString()
+    }
+
+    private fun activeCardio(): ActiveCardio {
+        val name = "guidance-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        val exercise =
+            (repository.createExercise(
+                NewExerciseProfile(
+                    "Tapis guidé",
+                    RecordingMode.CONTINUOUS,
+                    TrackingMode.DURATION,
+                    0,
+                ),
+            ) as CreateExerciseResult.Created).exercise
+        val entry =
+            SessionExerciseDraft(
+                exercise = exercise,
+                plan = SessionExercisePlan(sets = 0, durationSeconds = 600),
+            )
+        assertEquals(
+            ActiveDraftMutationResult.Saved,
+            repository.saveActiveSessionDraft(
+                ActiveSessionDraft(
+                    startedAt = OffsetDateTime.now().minusMinutes(20).toString(),
+                    sessionType = SessionType.CARDIO,
+                    exercises = listOf(entry),
+                ),
+            ),
+        )
+        val loaded = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+        val exerciseStartedAt =
+            OffsetDateTime.parse(checkNotNull(loaded.draft.startedAt))
+                .plusSeconds(10)
+                .toString()
+        val started =
+            repository.startActiveSessionExercise(
+                entry.entryId,
+                exerciseStartedAt,
+            )
+        assertTrue(started is TrainlogRepository.SessionExerciseTimingResult.Started)
+        return ActiveCardio(repository, name, entry.entryId, exerciseStartedAt)
+    }
+
+    @Test
+    fun trainingCaptureTransitionsToCardioWithoutStarvingGuidance() {
+        val name = "guidance-transition-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            val exercise =
+                (repository.createExercise(
+                    NewExerciseProfile(
+                        "Vélo guidé après transition",
+                        RecordingMode.CONTINUOUS,
+                        TrackingMode.DURATION,
+                        0,
+                    ),
+                ) as CreateExerciseResult.Created).exercise
+            assertEquals(ActiveDraftMutationResult.Saved, repository.startActiveSessionDraft())
+            val training =
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            val base = OffsetDateTime.parse(checkNotNull(training.startedAt))
+            val firstMeasurement =
+                ParsedHeartRateMeasurement(
+                    bpm = 101,
+                    sensorContactDetected = true,
+                    energyExpended = 12,
+                    rrIntervals1024 = listOf(611),
+                )
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR",
+                    base.plusSeconds(1).toString(),
+                    firstMeasurement,
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            val originalCapture = checkNotNull(repository.activeHeartRateCapture())
+            assertEquals(HeartRateContextKind.SESSION, originalCapture.contextKind)
+
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(training.copy(sessionType = SessionType.CARDIO)),
+            )
+            val transitionedCapture = checkNotNull(repository.activeHeartRateCapture())
+            assertEquals(originalCapture.captureId, transitionedCapture.captureId)
+            assertEquals(HeartRateContextKind.CARDIO, transitionedCapture.contextKind)
+
+            val entry =
+                SessionExerciseDraft(
+                    exercise = exercise,
+                    plan = SessionExercisePlan(sets = 0, durationSeconds = 60),
+                )
+            val cardio =
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(cardio.copy(exercises = listOf(entry))),
+            )
+            assertTrue(
+                repository.startActiveSessionExercise(entry.entryId, base.plusSeconds(2).toString()) is
+                    TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+            val target = CardioTargetSnapshot(100, 110)
+            val phase =
+                CardioGuidedPhase(
+                    phaseId = "cgp_" + UUID.randomUUID(),
+                    kind = CardioPhaseKind.WARMUP,
+                    target = target,
+                    exitCondition = CardioPhaseExitCondition.FixedDuration(60),
+                )
+            assertTrue(
+                repository.startCardioGuidancePhase(
+                    entry.entryId,
+                    phase,
+                    base.plusSeconds(3).toString(),
+                ) is TrainlogRepository.CardioGuidanceMutationResult.Applied,
+            )
+            val secondAt = base.plusSeconds(4).toString()
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR",
+                    secondAt,
+                    firstMeasurement.copy(bpm = 99),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            assertTrue(
+                repository.recordCardioGuidanceOutput(
+                    phase.phaseId,
+                    secondAt,
+                    CardioGuidanceOutput(CardioGuidanceInstruction.ACCELERATE, 99, target),
+                ) is TrainlogRepository.CardioGuidanceMutationResult.Applied,
+            )
+            assertEquals(
+                listOf(CardioGuidanceInstruction.ACCELERATE),
+                repository.listCardioGuidanceEvents(phase.phaseId).map { it.instruction },
+            )
+
+            val lateReverse =
+                repository.saveActiveSessionDraft(
+                    (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded)
+                        .draft
+                        .copy(sessionType = SessionType.TRAINING),
+                )
+            assertTrue(lateReverse is ActiveDraftMutationResult.Error)
+            assertEquals(
+                SessionType.CARDIO,
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded)
+                    .draft
+                    .sessionType,
+            )
+            assertEquals(
+                HeartRateContextKind.CARDIO,
+                checkNotNull(repository.activeHeartRateCapture()).contextKind,
+            )
+
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { db ->
+                db.rawQuery(
+                    "SELECT sequence,bpm,exercise_entry_id FROM heart_rate_samples " +
+                        "WHERE capture_id=? ORDER BY sequence",
+                    arrayOf(originalCapture.captureId),
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(0L, cursor.getLong(0))
+                    assertEquals(101, cursor.getInt(1))
+                    assertTrue(cursor.isNull(2))
+                    assertTrue(cursor.moveToNext())
+                    assertEquals(1L, cursor.getLong(0))
+                    assertEquals(99, cursor.getInt(1))
+                    assertEquals(entry.entryId, cursor.getString(2))
+                    assertTrue(!cursor.moveToNext())
+                }
+            }
+
+            assertEquals(ActiveDraftMutationResult.Saved, repository.discardActiveSessionDraft())
+            assertNull(repository.activeHeartRateCapture())
+            assertNull(repository.activeCardioGuidancePhase())
+            assertTrue(repository.listActiveSessionExerciseTimings().isEmpty())
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun cardioCaptureCanReturnToTrainingBeforeCardioOnlyFactsExist() {
+        val name = "guidance-early-reverse-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            assertEquals(ActiveDraftMutationResult.Saved, repository.startActiveSessionDraft())
+            val training =
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            val observedAt =
+                OffsetDateTime.parse(checkNotNull(training.startedAt)).plusSeconds(1).toString()
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR",
+                    observedAt,
+                    ParsedHeartRateMeasurement(103, null, null, listOf(600)),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            val captureId = checkNotNull(repository.activeHeartRateCapture()).captureId
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(training.copy(sessionType = SessionType.CARDIO)),
+            )
+            val cardio =
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(cardio.copy(sessionType = SessionType.TRAINING)),
+            )
+            val reversed = checkNotNull(repository.activeHeartRateCapture())
+            assertEquals(captureId, reversed.captureId)
+            assertEquals(HeartRateContextKind.SESSION, reversed.contextKind)
+
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).path,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { db ->
+                db.rawQuery(
+                    "SELECT COUNT(*),MIN(bpm) FROM heart_rate_samples WHERE capture_id=?",
+                    arrayOf(captureId),
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(1, cursor.getInt(0))
+                    assertEquals(103, cursor.getInt(1))
+                }
+            }
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun phaseRequiresActiveCardioExerciseAndRecordsOnlyInstructionChanges() {
+        val active = activeCardio()
+        val repository = active.repository
+        try {
+            val target = CardioTargetSnapshot(120, 140)
+            val phase =
+                CardioGuidedPhase(
+                    phaseId = "cgp_" + UUID.randomUUID(),
+                    kind = CardioPhaseKind.WORK,
+                    target = target,
+                    exitCondition = CardioPhaseExitCondition.FixedDuration(180),
+                )
+            val started =
+                repository.startCardioGuidancePhase(
+                    active.entryId,
+                    phase,
+                    active.at(10),
+                ) as TrainlogRepository.CardioGuidanceMutationResult.Applied
+            assertEquals(CardioGuidanceInstruction.MAINTAIN, started.phase!!.currentInstruction)
+
+            repository.recordCardioGuidanceOutput(
+                phase.phaseId,
+                active.at(13),
+                CardioGuidanceOutput(
+                    CardioGuidanceInstruction.ACCELERATE,
+                    110,
+                    target,
+                ),
+            )
+            repository.recordCardioGuidanceOutput(
+                phase.phaseId,
+                active.at(14),
+                CardioGuidanceOutput(
+                    CardioGuidanceInstruction.ACCELERATE,
+                    111,
+                    target,
+                ),
+            )
+            repository.recordCardioGuidanceOutput(
+                phase.phaseId,
+                active.at(30),
+                CardioGuidanceOutput(
+                    CardioGuidanceInstruction.MAINTAIN,
+                    130,
+                    target,
+                ),
+            )
+            assertEquals(
+                listOf(
+                    CardioGuidanceInstruction.ACCELERATE,
+                    CardioGuidanceInstruction.MAINTAIN,
+                ),
+                repository.listCardioGuidanceEvents(phase.phaseId).map { it.instruction },
+            )
+
+            repository.finishActiveSessionExercise(
+                active.entryId,
+                active.at(600),
+            )
+            assertNull(repository.activeCardioGuidancePhase())
+            val completedDraft =
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    completedDraft.copy(
+                        exercises =
+                            completedDraft.exercises.map {
+                                if (it.entryId == active.entryId) {
+                                    it.copy(continuousDurationSeconds = 600)
+                                } else {
+                                    it
+                                }
+                            },
+                    ),
+                ),
+            )
+            val finalized = repository.finalizeActiveSessionDraft()
+            assertTrue(finalized is FinalizeActiveDraftResult.Saved)
+        } finally {
+            repository.close()
+            context.deleteDatabase(active.databaseName)
+        }
+    }
+
+    @Test
+    fun guidanceCannotStartBeforeExerciseTimingIsActive() {
+        val name = "guidance-inactive-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            val exercise =
+                (repository.createExercise(
+                    NewExerciseProfile(
+                        "Vélo guidé",
+                        RecordingMode.CONTINUOUS,
+                        TrackingMode.DURATION,
+                        0,
+                    ),
+                ) as CreateExerciseResult.Created).exercise
+            repository.startActiveSessionDraft()
+            val loaded = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            val entry = SessionExerciseDraft(exercise = exercise, continuousDurationSeconds = 60)
+            repository.saveActiveSessionDraft(
+                loaded.draft.copy(sessionType = SessionType.CARDIO, exercises = listOf(entry)),
+            )
+            val result =
+                repository.startCardioGuidancePhase(
+                    entry.entryId,
+                    CardioGuidedPhase(
+                        "cgp_" + UUID.randomUUID(),
+                        CardioPhaseKind.WARMUP,
+                        CardioTargetSnapshot(100, 115),
+                        CardioPhaseExitCondition.FixedDuration(60),
+                    ),
+                    "2026-09-23T13:00:00+02:00",
+                )
+            assertTrue(result is TrainlogRepository.CardioGuidanceMutationResult.Invalid)
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun abandonedDraftDeletesOnlyUnfinishedGuidanceRun() {
+        val active = activeCardio()
+        val repository = active.repository
+        try {
+            repository.startCardioGuidancePhase(
+                active.entryId,
+                CardioGuidedPhase(
+                    "cgp_" + UUID.randomUUID(),
+                    CardioPhaseKind.WORK,
+                    CardioTargetSnapshot(120, 140),
+                    CardioPhaseExitCondition.FixedDuration(120),
+                ),
+                active.at(10),
+            )
+            assertTrue(repository.activeCardioGuidancePhase() != null)
+            repository.discardActiveSessionDraft()
+            assertNull(repository.activeCardioGuidancePhase())
+        } finally {
+            repository.close()
+            context.deleteDatabase(active.databaseName)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/CardioPhaseCompletionTest.kt

@@ -0,0 +1,67 @@
+package com.labfytools.trainlog.data
+
+import com.labfytools.trainlog.model.CardioGuidedPhase
+import com.labfytools.trainlog.model.CardioPhaseExitCondition
+import com.labfytools.trainlog.model.CardioPhaseKind
+import com.labfytools.trainlog.model.CardioTargetSnapshot
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class CardioPhaseCompletionTest {
+    private val target = CardioTargetSnapshot(120, 140)
+
+    private fun phase(
+        exit: CardioPhaseExitCondition,
+        targetOverride: CardioTargetSnapshot? = target,
+    ) = CardioGuidedPhase(
+        phaseId = "phase_test",
+        kind = CardioPhaseKind.WORK,
+        target = targetOverride,
+        exitCondition = exit,
+    )
+
+    @Test
+    fun fixedDurationUsesElapsedTimeOnly() {
+        val p = phase(CardioPhaseExitCondition.FixedDuration(180))
+        assertFalse(CardioPhaseCompletion.isComplete(p, 179, null, false))
+        assertTrue(CardioPhaseCompletion.isComplete(p, 180, null, false))
+    }
+
+    @Test
+    fun enterTargetRequiresFreshMeasurementInsideSnapshot() {
+        val p = phase(CardioPhaseExitCondition.EnterTarget)
+        assertFalse(CardioPhaseCompletion.isComplete(p, 10, 130, false))
+        assertFalse(CardioPhaseCompletion.isComplete(p, 10, 119, true))
+        assertTrue(CardioPhaseCompletion.isComplete(p, 10, 120, true))
+        assertTrue(CardioPhaseCompletion.isComplete(p, 10, 140, true))
+    }
+
+    @Test
+    fun enterTargetWithoutTargetNeverCompletes() {
+        val p = phase(CardioPhaseExitCondition.EnterTarget, null)
+        assertFalse(CardioPhaseCompletion.isComplete(p, 100, 130, true))
+    }
+
+    @Test
+    fun recoveryThresholdRequiresFreshMeasurement() {
+        val p = phase(CardioPhaseExitCondition.RecoverBelow(110), null)
+        assertFalse(CardioPhaseCompletion.isComplete(p, 30, 105, false))
+        assertFalse(CardioPhaseCompletion.isComplete(p, 30, 111, true))
+        assertTrue(CardioPhaseCompletion.isComplete(p, 30, 110, true))
+    }
+
+    @Test
+    fun durationOrRecoveryCanFinishFromEitherRealCondition() {
+        val p = phase(CardioPhaseExitCondition.DurationOrRecoverBelow(300, 110), null)
+        assertFalse(CardioPhaseCompletion.isComplete(p, 299, 120, true))
+        assertTrue(CardioPhaseCompletion.isComplete(p, 100, 108, true))
+        assertTrue(CardioPhaseCompletion.isComplete(p, 300, null, false))
+    }
+
+    @Test
+    fun negativeElapsedTimeCannotCompleteAnything() {
+        val p = phase(CardioPhaseExitCondition.FixedDuration(0))
+        assertFalse(CardioPhaseCompletion.isComplete(p, -1, 130, true))
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/CardioSessionSyncGenerationTest.kt

@@ -0,0 +1,194 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionSetDraft
+import com.labfytools.trainlog.model.SessionType
+import com.labfytools.trainlog.model.TrackingMode
+import java.nio.file.Files
+import java.util.UUID
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class CardioSessionSyncGenerationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun dedicatedCardioCompanionImportsWithoutWideningFrozenHistory() {
+        val sourceName = "cardio-sync-" + UUID.randomUUID() + ".db"
+        val root = Files.createTempDirectory("trainlog-cardio-sync-").toFile()
+        val source = TrainlogRepository(context, sourceName)
+        try {
+            val exercise =
+                (source.createExercise(
+                    NewExerciseProfile(
+                        "Cardio sync exercise",
+                        RecordingMode.SETS,
+                        TrackingMode.REPS,
+                        0,
+                    ),
+                ) as CreateExerciseResult.Created).exercise
+            val entry =
+                SessionExerciseDraft(
+                    exercise = exercise,
+                    sets = listOf(SessionSetDraft(reps = 15)),
+                )
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                source.saveActiveSessionDraft(
+                    ActiveSessionDraft(
+                        sessionType = SessionType.CARDIO,
+                        exercises = listOf(entry),
+                    ),
+                ),
+            )
+            assertTrue(
+                source.finalizeActiveSessionDraft() is FinalizeActiveDraftResult.Saved,
+            )
+            val sessionId = source.listSessions().single().sessionId
+
+            val repositoryRoot =
+                generateSequence(java.io.File(checkNotNull(System.getProperty("user.dir")))) {
+                    it.parentFile
+                }.first { java.io.File(it, "tools/sync_generation_exchange.py").isFile }
+
+            fun run(vararg command: String): String {
+                val process =
+                    ProcessBuilder(*command)
+                        .directory(repositoryRoot)
+                        .redirectErrorStream(true)
+                        .start()
+                val output = process.inputStream.bufferedReader().readText()
+                assertEquals(
+                    "command failed: " + command.joinToString(" ") + "\n" + output,
+                    0,
+                    process.waitFor(),
+                )
+                return output
+            }
+
+            val desktopDb = java.io.File(root, "desktop.sqlite")
+            run(
+                java.io.File(
+                    repositoryRoot,
+                    "build/tui/sync-generation-fixture",
+                ).absolutePath,
+                desktopDb.absolutePath,
+            )
+            val desktopPeer =
+                Regex("PEER_ID=(peer_[^\\s]+)")
+                    .find(
+                        run(
+                            "python3",
+                            java.io.File(
+                                repositoryRoot,
+                                "tools/sync_generation_exchange.py",
+                            ).absolutePath,
+                            "peer-id",
+                            "--database",
+                            desktopDb.absolutePath,
+                        ),
+                    )!!
+                    .groupValues[1]
+
+            val service = SyncGenerationService(source)
+            val captured = service.capture(root, desktopPeer)
+            val history =
+                JSONObject(
+                    java.io.File(
+                        captured.stagingDirectory,
+                        "history-v4.json",
+                    ).readText(),
+                )
+            assertEquals(0, history.getJSONArray("sessions").length())
+
+            val cardio =
+                JSONObject(
+                    java.io.File(
+                        captured.stagingDirectory,
+                        "cardio-sessions-v1.json",
+                    ).readText(),
+                )
+            assertEquals("trainlog-cardio-sessions", cardio.getString("format"))
+            assertEquals(1, cardio.getJSONArray("sessions").length())
+            assertEquals(
+                "cardio",
+                cardio
+                    .getJSONArray("sessions")
+                    .getJSONObject(0)
+                    .getString("session_type"),
+            )
+
+            val published = service.publish(captured, java.io.File(root, "objects"))
+            val ackFile = java.io.File(root, "ack.json")
+            run(
+                "python3",
+                java.io.File(
+                    repositoryRoot,
+                    "tools/sync_generation_exchange.py",
+                ).absolutePath,
+                "consume-desktop",
+                published.absolutePath,
+                "--database",
+                desktopDb.absolutePath,
+                "--ack-output",
+                ackFile.absolutePath,
+            )
+            val ack = JSONObject(ackFile.readText())
+            assertEquals(
+                "desktop ACK diagnostic: " + ack.getString("diagnostic"),
+                "consumed",
+                ack.getString("result"),
+            )
+            assertEquals(
+                "training|cardio|15",
+                run(
+                    "sqlite3",
+                    desktopDb.absolutePath,
+                    "SELECT s.session_type || '|' || s.session_kind || '|' || ps.reps " +
+                        "FROM sessions s JOIN session_exercises se ON se.session_row_id=s.id " +
+                        "JOIN performed_sets ps ON ps.session_exercise_row_id=se.id " +
+                        "WHERE s.session_id='$sessionId';",
+                ).trim(),
+            )
+
+            assertEquals(
+                "acknowledged",
+                service.acceptAcknowledgement(ackFile.readBytes()),
+            )
+            assertEquals(
+                ack.toString(),
+                JSONObject(
+                    run(
+                        "python3",
+                        java.io.File(
+                            repositoryRoot,
+                            "tools/sync_generation_exchange.py",
+                        ).absolutePath,
+                        "consume-desktop",
+                        published.absolutePath,
+                        "--database",
+                        desktopDb.absolutePath,
+                        "--ack-output",
+                        java.io.File(root, "replay-ack.json").absolutePath,
+                    ).let { java.io.File(root, "replay-ack.json").readText() },
+                ).toString(),
+            )
+        } finally {
+            source.close()
+            context.deleteDatabase(sourceName)
+            root.deleteRecursively()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/CardioSessionTypeTest.kt

@@ -0,0 +1,95 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionSetDraft
+import com.labfytools.trainlog.model.SessionType
+import com.labfytools.trainlog.model.TrackingMode
+import java.util.UUID
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class CardioSessionTypeTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun cardioIsCanonicalLocallyAndExcludedFromFrozenMobileHistory() {
+        val name = "cardio-kind-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            val exercise =
+                (repository.createExercise(
+                    NewExerciseProfile(
+                        "Cardio kind exercise",
+                        RecordingMode.SETS,
+                        TrackingMode.REPS,
+                        0,
+                    ),
+                ) as CreateExerciseResult.Created).exercise
+            val occurrence =
+                SessionExerciseDraft(
+                    exercise = exercise,
+                    sets = listOf(SessionSetDraft(reps = 1)),
+                )
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    ActiveSessionDraft(
+                        sessionType = SessionType.CARDIO,
+                        exercises = listOf(occurrence),
+                    ),
+                ),
+            )
+            val loaded =
+                repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(SessionType.CARDIO, loaded.draft.sessionType)
+
+            val db = context.openOrCreateDatabase(name, Context.MODE_PRIVATE, null)
+            db.rawQuery(
+                "SELECT session_type,session_kind FROM active_session_draft WHERE id=1",
+                null,
+            ).use { cursor ->
+                assertTrue(cursor.moveToFirst())
+                assertEquals("training", cursor.getString(0))
+                assertEquals("cardio", cursor.getString(1))
+            }
+            db.close()
+
+            assertTrue(
+                repository.finalizeActiveSessionDraft() is FinalizeActiveDraftResult.Saved,
+            )
+            assertEquals(
+                SessionType.CARDIO,
+                repository.listSessions().single().sessionType,
+            )
+
+            val frozen = JSONObject(repository.buildMobileExportV4Json())
+            assertEquals(0, frozen.getJSONArray("sessions").length())
+
+            val verify = context.openOrCreateDatabase(name, Context.MODE_PRIVATE, null)
+            verify.rawQuery(
+                "SELECT session_type,session_kind FROM sessions",
+                null,
+            ).use { cursor ->
+                assertTrue(cursor.moveToFirst())
+                assertEquals("training", cursor.getString(0))
+                assertEquals("cardio", cursor.getString(1))
+            }
+            verify.close()
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/HeartRateLiveStateTest.kt

@@ -0,0 +1,42 @@
+package com.labfytools.trainlog.data
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+class HeartRateLiveStateTest {
+    @Test
+    fun liveStateDropsStaleBpmWithoutInventingMeasurement() {
+        HeartRateLiveState.disconnected()
+        val observed = mutableListOf<HeartRateLiveSnapshot>()
+        val subscription = HeartRateLiveState.subscribe { observed += it }
+        try {
+            HeartRateLiveState.connecting()
+            HeartRateLiveState.measurement(
+                ParsedHeartRateMeasurement(
+                    bpm = 82,
+                    sensorContactDetected = null,
+                    energyExpended = null,
+                    rrIntervals1024 = listOf(768),
+                ),
+            )
+            assertEquals(HeartRateLivePhase.CONNECTED, HeartRateLiveState.current().phase)
+            assertEquals(82, HeartRateLiveState.current().bpm)
+            assertEquals(listOf(768), HeartRateLiveState.current().rrIntervals1024)
+            assertEquals(1L, HeartRateLiveState.current().notificationCount)
+
+            HeartRateLiveState.stale()
+            assertEquals(HeartRateLivePhase.STALE, HeartRateLiveState.current().phase)
+            assertNull(HeartRateLiveState.current().bpm)
+            assertEquals(listOf(768), HeartRateLiveState.current().rrIntervals1024)
+
+            HeartRateLiveState.disconnected()
+            assertEquals(HeartRateLivePhase.DISCONNECTED, HeartRateLiveState.current().phase)
+            assertNull(HeartRateLiveState.current().bpm)
+            assertEquals(5, observed.size)
+        } finally {
+            subscription.close()
+            HeartRateLiveState.disconnected()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/HeartRateMeasurementParserTest.kt

@@ -0,0 +1,95 @@
+package com.labfytools.trainlog.data
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class HeartRateMeasurementParserTest {
+    private fun parsed(vararg bytes: Int): ParsedHeartRateMeasurement {
+        val result =
+            HeartRateMeasurementParser.parse(
+                ByteArray(bytes.size) { index -> bytes[index].toByte() },
+            )
+        return (result as HeartRateMeasurementParseResult.Parsed).measurement
+    }
+
+    private fun invalid(vararg bytes: Int): HeartRateMeasurementParseResult.Invalid =
+        HeartRateMeasurementParser.parse(
+            ByteArray(bytes.size) { index -> bytes[index].toByte() },
+        ) as HeartRateMeasurementParseResult.Invalid
+
+    @Test
+    fun parsesEightBitBpm() {
+        val value = parsed(0x00, 72)
+        assertEquals(72, value.bpm)
+        assertNull(value.sensorContactDetected)
+        assertNull(value.energyExpended)
+        assertTrue(value.rrIntervals1024.isEmpty())
+    }
+
+    @Test
+    fun parsesSixteenBitBpmLittleEndian() {
+        assertEquals(300, parsed(0x01, 0x2c, 0x01).bpm)
+        assertEquals(65535, parsed(0x01, 0xff, 0xff).bpm)
+    }
+
+    @Test
+    fun contactIsNullableAndOnlyMeaningfulWhenSupported() {
+        assertNull(parsed(0x02, 80).sensorContactDetected)
+        assertEquals(false, parsed(0x04, 80).sensorContactDetected)
+        assertEquals(true, parsed(0x06, 80).sensorContactDetected)
+    }
+
+    @Test
+    fun parsesEnergyExpended() {
+        val value = parsed(0x08, 90, 0x34, 0x12)
+        assertEquals(0x1234, value.energyExpended)
+    }
+
+    @Test
+    fun parsesOneAndMultipleRawRrIntervals() {
+        assertEquals(listOf(1024), parsed(0x10, 60, 0x00, 0x04).rrIntervals1024)
+        assertEquals(
+            listOf(1024, 1000, 65535),
+            parsed(0x10, 60, 0x00, 0x04, 0xe8, 0x03, 0xff, 0xff).rrIntervals1024,
+        )
+    }
+
+    @Test
+    fun parsesCombinedKnownFlagsInWireOrder() {
+        val value =
+            parsed(
+                0x1f,
+                0x96,
+                0x00,
+                0x07,
+                0x00,
+                0xf0,
+                0x03,
+                0x00,
+                0x04,
+            )
+        assertEquals(150, value.bpm)
+        assertEquals(true, value.sensorContactDetected)
+        assertEquals(7, value.energyExpended)
+        assertEquals(listOf(1008, 1024), value.rrIntervals1024)
+    }
+
+    @Test
+    fun rejectsTruncatedAndIncoherentPayloads() {
+        assertEquals("missing flags", invalid().reason)
+        assertEquals("truncated 16-bit BPM", invalid(0x01, 0x2c).reason)
+        assertEquals("truncated energy-expended value", invalid(0x08, 70, 0x01).reason)
+        assertEquals("RR flag has no interval", invalid(0x10, 70).reason)
+        assertEquals("truncated RR interval", invalid(0x10, 70, 0x01).reason)
+        assertEquals("unexpected trailing bytes", invalid(0x00, 70, 0x01).reason)
+        assertEquals("reserved flags are set", invalid(0x20, 70).reason)
+    }
+
+    @Test
+    fun preservesBoundaryBpmValues() {
+        assertEquals(0, parsed(0x00, 0).bpm)
+        assertEquals(255, parsed(0x00, 255).bpm)
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/HeartRateRepositoryTest.kt

@@ -0,0 +1,96 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.HeartRateContextKind
+import com.labfytools.trainlog.model.HeartRateRrInterval
+import com.labfytools.trainlog.model.SleepDiaryDraft
+import java.util.UUID
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class HeartRateRepositoryTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun sleepCaptureStoresRawSamplesAndExportsOnlyAfterStop() {
+        val name = "heart-rate-${UUID.randomUUID()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            val created =
+                repository.saveSleepDiary(
+                    SleepDiaryDraft(
+                        nightStartDate = "2026-09-22",
+                        nightEndDate = "2026-09-23",
+                        createdAt = "2026-09-22T22:00:00+02:00",
+                        updatedAt = "2026-09-22T22:00:00+02:00",
+                        sleepQuality = null,
+                        wakeQuality = null,
+                        dayForm = null,
+                        treatmentAndNotes = "",
+                        events = emptyList(),
+                    ),
+                ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+
+            val started =
+                repository.startHeartRateCapture(
+                    HeartRateContextKind.SLEEP,
+                    created.entryId,
+                    "2026-09-22T22:30:00+02:00",
+                    "Synthetic HR sensor",
+                ) as TrainlogRepository.StartHeartRateCaptureResult.Started
+            assertEquals(started.captureId, repository.activeHeartRateCapture()?.captureId)
+
+            val sample =
+                repository.appendHeartRateSample(
+                    captureId = started.captureId,
+                    observedAt = "2026-09-22T22:30:01+02:00",
+                    bpm = 61,
+                    sensorContactDetected = true,
+                    energyExpended = 7,
+                    rrIntervals = listOf(
+                        HeartRateRrInterval(0, 1024),
+                        HeartRateRrInterval(1, 1000),
+                    ),
+                ) as TrainlogRepository.HeartRateMutationResult.Applied
+            assertEquals(0L, sample.sequence)
+
+            assertEquals(
+                0,
+                JSONObject(repository.buildHeartRateV1Json()).getJSONArray("captures").length(),
+            )
+            assertTrue(
+                repository.stopHeartRateCapture(
+                    started.captureId,
+                    "2026-09-23T06:30:00+02:00",
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            assertNull(repository.activeHeartRateCapture())
+
+            val root = JSONObject(repository.buildHeartRateV1Json())
+            assertEquals("trainlog-heart-rate", root.getString("format"))
+            assertEquals(1, root.getInt("version"))
+            val capture = root.getJSONArray("captures").getJSONObject(0)
+            assertEquals(created.entryId, capture.getString("context_id"))
+            assertEquals("sleep", capture.getString("context_kind"))
+            assertEquals("Synthetic HR sensor", capture.getString("sensor_name"))
+            val stored = capture.getJSONArray("samples").getJSONObject(0)
+            assertEquals(61, stored.getInt("bpm"))
+            assertTrue(stored.getBoolean("sensor_contact_detected"))
+            assertEquals(7, stored.getInt("energy_expended"))
+            assertEquals(1024, stored.getJSONArray("rr_intervals_1024").getInt(0))
+            assertEquals(1000, stored.getJSONArray("rr_intervals_1024").getInt(1))
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/HeartRateSensorPreferencesTest.kt

@@ -0,0 +1,32 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class HeartRateSensorPreferencesTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun selectionIsDurableAndClearable() {
+        val preferences = HeartRateSensorPreferences(context)
+        preferences.clear()
+        assertNull(preferences.selected())
+
+        preferences.select("AA:BB:CC:DD:EE:FF", "Synthetic HR")
+        assertEquals(
+            SelectedHeartRateSensor("AA:BB:CC:DD:EE:FF", "Synthetic HR"),
+            HeartRateSensorPreferences(context).selected(),
+        )
+
+        preferences.clear()
+        assertNull(HeartRateSensorPreferences(context).selected())
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/IsolatedTestEnvironmentTest.kt

@@ -0,0 +1,35 @@
+package com.labfytools.trainlog.data
+
+import java.nio.file.Path
+import kotlin.io.path.Path
+import kotlin.io.path.isDirectory
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class IsolatedTestEnvironmentTest {
+    @Test
+    fun `private paths reach the Robolectric JVM`() {
+        val rootText = System.getenv("TRAINLOG_TEST_RUN_ROOT") ?: return
+        val root = Path(rootText).toRealPath()
+        fun assertedPath(environmentName: String): Path {
+            val value = System.getenv(environmentName)
+            assertTrue("$environmentName missing", !value.isNullOrBlank())
+            val path = Path(value!!).toRealPath()
+            assertTrue("$environmentName escapes run root", path.startsWith(root))
+            assertTrue("$environmentName is not a directory", path.isDirectory())
+            return path
+        }
+
+        /* CONTRACT: JAVA_TOOL_OPTIONS must reach the forked test JVM, not only
+         * the Gradle launcher; native Robolectric extraction uses this value. */
+        assertEquals(assertedPath("TRAINLOG_TEST_TMPDIR"), Path(System.getProperty("java.io.tmpdir")).toRealPath())
+        assertedPath("HOME")
+        assertedPath("XDG_DATA_HOME")
+        assertedPath("XDG_CONFIG_HOME")
+        assertedPath("XDG_CACHE_HOME")
+        assertedPath("XDG_RUNTIME_DIR")
+        assertedPath("TRAINLOG_TEST_EXCHANGE_DIR")
+        assertedPath("TRAINLOG_TEST_DATABASE_DIR")
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/ProgramSessionCardioReadinessTest.kt

@@ -0,0 +1,490 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.HeartRateContextKind
+import com.labfytools.trainlog.model.SessionSetDraft
+import java.nio.file.Files
+import java.time.OffsetDateTime
+import java.util.UUID
+import org.json.JSONArray
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class ProgramSessionCardioReadinessTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun programSessionPreservesTimelineAndHeartRateOwnershipThroughDesktopReplay() {
+        val androidName = "program-cardio-readiness-${UUID.randomUUID()}.db"
+        val android = TrainlogRepository(context, androidName)
+        val root = Files.createTempDirectory("trainlog-program-cardio-readiness-").toFile()
+        val repositoryRoot =
+            generateSequence(java.io.File(checkNotNull(System.getProperty("user.dir")))) {
+                it.parentFile
+            }.first { java.io.File(it, "tools/sync_generation_exchange.py").isFile }
+        val desktopDb = java.io.File(root, "desktop.sqlite")
+        val fixture = java.io.File(repositoryRoot, "build/tui/sync-generation-fixture")
+        val generationTool =
+            java.io.File(repositoryRoot, "tools/sync_generation_exchange.py").absolutePath
+
+        fun run(vararg command: String): String {
+            val process =
+                ProcessBuilder(*command)
+                    .directory(repositoryRoot)
+                    .redirectErrorStream(true)
+                    .start()
+            val output = process.inputStream.bufferedReader().readText()
+            assertEquals(
+                "command failed: ${command.joinToString(" ")}\n$output",
+                0,
+                process.waitFor(),
+            )
+            return output
+        }
+
+        fun measurement(bpm: Int, rr: Int) =
+            ParsedHeartRateMeasurement(
+                bpm = bpm,
+                sensorContactDetected = true,
+                energyExpended = null,
+                rrIntervals1024 = listOf(rr),
+            )
+
+        try {
+            val programId = "pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"
+            val programSessionId = "pgs_bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb"
+            val programExerciseAId = "ex_dddddddd-dddd-4ddd-8ddd-dddddddddddd"
+            val programExerciseBId = "ex_11111111-1111-4111-8111-111111111111"
+            val catalog =
+                JSONObject()
+                    .put("format", "trainlog-pc-catalog")
+                    .put("version", 1)
+                    .put(
+                        "exercises",
+                        JSONArray()
+                            .put(
+                                JSONObject()
+                                    .put("exercise_id", programExerciseAId)
+                                    .put("name", "Program exercise fixture A")
+                                    .put("recording_mode", "sets")
+                                    .put("tracking_mode", "reps")
+                                    .put("data_fields", 0),
+                            )
+                            .put(
+                                JSONObject()
+                                    .put("exercise_id", programExerciseBId)
+                                    .put("name", "Program exercise fixture B")
+                                    .put("recording_mode", "sets")
+                                    .put("tracking_mode", "reps")
+                                    .put("data_fields", 0),
+                            ),
+                    )
+                    .toString()
+            assertTrue(android.applyPcCatalogJson(catalog) is PcCatalogImportResult.Applied)
+            val program =
+                JSONObject()
+                    .put("program_id", programId)
+                    .put("revision_id", "pgr_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")
+                    .put("title", "Tomorrow readiness")
+                    .put("note", JSONObject.NULL)
+                    .put("state", "active")
+                    .put("start_date", "2026-09-24")
+                    .put("end_date", JSONObject.NULL)
+                    .put("created_at", "2026-09-23T16:00:00Z")
+                    .put("updated_at", "2026-09-23T16:00:00Z")
+                    .put("source_format", "trainlog-program")
+                    .put("source_version", 1)
+                    .put("source_payload_sha256", "a".repeat(64))
+                    .put(
+                        "sessions",
+                        JSONArray().put(
+                            JSONObject()
+                                .put("program_session_id", programSessionId)
+                                .put("title", "Session A")
+                                .put("session_type", "training")
+                                .put("planned_for", "2026-09-24")
+                                .put("note", JSONObject.NULL)
+                                .put(
+                                    "occurrences",
+                                    JSONArray()
+                                        .put(
+                                            JSONObject()
+                                                .put(
+                                                    "entry_id",
+                                                    "pge_cccccccc-cccc-4ccc-8ccc-cccccccccccc",
+                                                )
+                                                .put("exercise_id", programExerciseAId)
+                                                .put("equipment_id", JSONObject.NULL)
+                                                .put("load_mode", "external")
+                                                .put("rest_seconds", 90)
+                                                .put("target_sets", 1)
+                                                .put("target_reps", 8)
+                                                .put("target_duration_seconds", JSONObject.NULL)
+                                                .put("target_weight_kg", 40.0)
+                                                .put("notes", JSONObject.NULL),
+                                        )
+                                        .put(
+                                            JSONObject()
+                                                .put(
+                                                    "entry_id",
+                                                    "pge_22222222-2222-4222-8222-222222222222",
+                                                )
+                                                .put("exercise_id", programExerciseBId)
+                                                .put("equipment_id", JSONObject.NULL)
+                                                .put("load_mode", "external")
+                                                .put("rest_seconds", 60)
+                                                .put("target_sets", 1)
+                                                .put("target_reps", 10)
+                                                .put("target_duration_seconds", JSONObject.NULL)
+                                                .put("target_weight_kg", 25.0)
+                                                .put("notes", JSONObject.NULL),
+                                        ),
+                                ),
+                        ),
+                    )
+            val programs =
+                JSONObject()
+                    .put("format", "trainlog-programs")
+                    .put("version", 1)
+                    .put("generated_at", "2026-09-23T16:01:00Z")
+                    .put("programs", JSONArray().put(program))
+                    .put("deletions", JSONArray())
+                    .toString()
+            assertEquals(
+                ProgramsImportResult.Applied(1, 0, 0),
+                android.applyProgramsV1Json(programs),
+            )
+
+            assertEquals(
+                StartProgramSessionResult.Started,
+                android.startSyncedProgramSession(programId, programSessionId),
+            )
+            val opened = android.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            val sessionId = checkNotNull(opened.draft.sessionId)
+            val sessionStartedAt = checkNotNull(opened.draft.startedAt)
+            assertEquals(programId, opened.draft.sourceProgramId)
+            assertEquals(programSessionId, opened.draft.sourceProgramSessionId)
+            assertEquals(2, opened.draft.exercises.size)
+            val exerciseA = opened.draft.exercises[0]
+            val exerciseBEntry = opened.draft.exercises[1]
+            assertEquals(programExerciseAId, exerciseA.exercise.exerciseId)
+            assertEquals(programExerciseBId, exerciseBEntry.exercise.exerciseId)
+            assertTrue(exerciseA.entryId != exerciseBEntry.entryId)
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                android.saveActiveSessionDraft(
+                    opened.draft.copy(
+                        exercises =
+                            listOf(
+                                exerciseA.copy(
+                                    sets = listOf(SessionSetDraft(reps = 8, weightKg = 40.0)),
+                                ),
+                                exerciseBEntry.copy(
+                                    sets = listOf(SessionSetDraft(reps = 10, weightKg = 25.0)),
+                                ),
+                            ),
+                    ),
+                ),
+            )
+            val edited = android.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(sessionId, edited.draft.sessionId)
+            assertEquals(sessionStartedAt, edited.draft.startedAt)
+            assertEquals(programId, edited.draft.sourceProgramId)
+            assertEquals(programSessionId, edited.draft.sourceProgramSessionId)
+
+            val preExerciseAt = OffsetDateTime.now().toString()
+            assertTrue(
+                android.recordLiveHeartRateForActiveSession(
+                    "Synthetic CYCPLUS",
+                    preExerciseAt,
+                    measurement(91, 675),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            val capture = checkNotNull(android.activeHeartRateCapture())
+            assertEquals(HeartRateContextKind.SESSION, capture.contextKind)
+            assertEquals(sessionId, capture.contextId)
+            assertEquals(sessionStartedAt, capture.startedAt)
+
+            val exerciseAStartedAt = OffsetDateTime.now().toString()
+            assertTrue(
+                android.startActiveSessionExercise(exerciseA.entryId, exerciseAStartedAt) is
+                    TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+            val exerciseASampleAt = OffsetDateTime.now().toString()
+            assertTrue(
+                android.recordLiveHeartRateForActiveSession(
+                    "Synthetic CYCPLUS",
+                    exerciseASampleAt,
+                    measurement(112, 548),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            val exerciseAEndedAt = OffsetDateTime.now().toString()
+            assertTrue(
+                android.finishActiveSessionExercise(exerciseA.entryId, exerciseAEndedAt) is
+                    TrainlogRepository.SessionExerciseTimingResult.Finished,
+            )
+
+            val betweenExercisesAt = OffsetDateTime.now().toString()
+            assertTrue(
+                android.recordLiveHeartRateForActiveSession(
+                    "Synthetic CYCPLUS",
+                    betweenExercisesAt,
+                    measurement(98, 620),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            val exerciseBStartedAt = OffsetDateTime.now().toString()
+            assertTrue(
+                android.startActiveSessionExercise(
+                    exerciseBEntry.entryId,
+                    exerciseBStartedAt,
+                ) is TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+            val exerciseBSampleAt = OffsetDateTime.now().toString()
+            assertTrue(
+                android.recordLiveHeartRateForActiveSession(
+                    "Synthetic CYCPLUS",
+                    exerciseBSampleAt,
+                    measurement(119, 525),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            val activeFinalize = android.finalizeActiveSessionDraft()
+            assertTrue(activeFinalize is FinalizeActiveDraftResult.Invalid)
+            assertTrue(
+                (activeFinalize as FinalizeActiveDraftResult.Invalid)
+                    .message
+                    .startsWith("ACTIVE_EXERCISE:"),
+            )
+            val exerciseBEndedAt = OffsetDateTime.now().toString()
+            assertTrue(
+                android.finishActiveSessionExercise(
+                    exerciseBEntry.entryId,
+                    exerciseBEndedAt,
+                ) is TrainlogRepository.SessionExerciseTimingResult.Finished,
+            )
+            val finalized = android.finalizeActiveSessionDraft()
+            assertTrue(finalized is FinalizeActiveDraftResult.Saved)
+            assertEquals(sessionId, (finalized as FinalizeActiveDraftResult.Saved).sessionId)
+            assertNull(android.activeHeartRateCapture())
+
+            val timeline = JSONObject(android.buildSessionTimelineV1Json())
+            val timelineSession = timeline.getJSONArray("sessions").getJSONObject(0)
+            val sessionEndedAt = timelineSession.getString("ended_at")
+            assertEquals(sessionId, timelineSession.getString("session_id"))
+            assertEquals(sessionStartedAt, timelineSession.getString("started_at"))
+            assertTrue(OffsetDateTime.parse(sessionEndedAt) > OffsetDateTime.parse(sessionStartedAt))
+            val timelineExercises = timelineSession.getJSONArray("exercises")
+            assertEquals(2, timelineExercises.length())
+            assertEquals(exerciseA.entryId, timelineExercises.getJSONObject(0).getString("entry_id"))
+            assertEquals(exerciseAStartedAt, timelineExercises.getJSONObject(0).getString("started_at"))
+            assertEquals(exerciseAEndedAt, timelineExercises.getJSONObject(0).getString("ended_at"))
+            assertEquals(
+                exerciseBEntry.entryId,
+                timelineExercises.getJSONObject(1).getString("entry_id"),
+            )
+            assertEquals(exerciseBStartedAt, timelineExercises.getJSONObject(1).getString("started_at"))
+            assertEquals(exerciseBEndedAt, timelineExercises.getJSONObject(1).getString("ended_at"))
+
+            val heart = JSONObject(android.buildHeartRateV1Json())
+            val heartCapture = heart.getJSONArray("captures").getJSONObject(0)
+            assertEquals(capture.captureId, heartCapture.getString("capture_id"))
+            assertEquals("session", heartCapture.getString("context_kind"))
+            assertEquals(sessionId, heartCapture.getString("context_id"))
+            assertEquals(sessionStartedAt, heartCapture.getString("started_at"))
+            assertEquals(sessionEndedAt, heartCapture.getString("ended_at"))
+            val samples = heartCapture.getJSONArray("samples")
+            assertEquals(4, samples.length())
+            val expectedOwnership =
+                listOf(null, exerciseA.entryId, null, exerciseBEntry.entryId)
+            val expectedTimes =
+                listOf(preExerciseAt, exerciseASampleAt, betweenExercisesAt, exerciseBSampleAt)
+            val expectedRr = listOf(675, 548, 620, 525)
+            for (index in 0 until samples.length()) {
+                val sample = samples.getJSONObject(index)
+                assertEquals(index.toLong(), sample.getLong("sequence"))
+                assertEquals(expectedTimes[index], sample.getString("observed_at"))
+                if (expectedOwnership[index] == null) {
+                    assertTrue(sample.isNull("exercise_entry_id"))
+                } else {
+                    assertEquals(expectedOwnership[index], sample.getString("exercise_entry_id"))
+                }
+                assertEquals(expectedRr[index], sample.getJSONArray("rr_intervals_1024").getInt(0))
+            }
+
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(androidName).absolutePath,
+                null,
+                SQLiteDatabase.OPEN_READONLY,
+            ).use { db ->
+                db.rawQuery(
+                    "SELECT source_program_id,source_program_session_id FROM sessions " +
+                        "WHERE session_id=?",
+                    arrayOf(sessionId),
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(programId, cursor.getString(0))
+                    assertEquals(programSessionId, cursor.getString(1))
+                }
+            }
+
+            run(fixture.absolutePath, desktopDb.absolutePath, "program-create")
+            val desktopPeer =
+                Regex("PEER_ID=(peer_[^\\s]+)")
+                    .find(
+                        run(
+                            "python3",
+                            generationTool,
+                            "peer-id",
+                            "--database",
+                            desktopDb.absolutePath,
+                        ),
+                    )!!
+                    .groupValues[1]
+            val service = SyncGenerationService(android)
+            val captured = service.capture(root, desktopPeer)
+            val published = service.publish(captured, java.io.File(root, "objects"))
+            val publishedTimeline =
+                JSONObject(java.io.File(published, "session-timeline-v1.json").readText())
+            val publishedHeart =
+                JSONObject(java.io.File(published, "heart-rate-v1.json").readText())
+            assertEquals(sessionId, publishedTimeline.getJSONArray("sessions").getJSONObject(0).getString("session_id"))
+            assertEquals(capture.captureId, publishedHeart.getJSONArray("captures").getJSONObject(0).getString("capture_id"))
+
+            val firstAck = java.io.File(root, "desktop-ack-first.json")
+            run(
+                "python3",
+                generationTool,
+                "consume-desktop",
+                published.absolutePath,
+                "--database",
+                desktopDb.absolutePath,
+                "--ack-output",
+                firstAck.absolutePath,
+            )
+            val countsBeforeReplay =
+                run(
+                    "sqlite3",
+                    desktopDb.absolutePath,
+                    "SELECT (SELECT count(*) FROM session_exercise_timeline WHERE session_id='$sessionId') || '|' || " +
+                        "(SELECT count(*) FROM heart_rate_samples WHERE capture_id='${capture.captureId}') || '|' || " +
+                        "(SELECT count(*) FROM heart_rate_rr_intervals WHERE capture_id='${capture.captureId}');",
+                ).trim()
+            assertEquals("2|4|4", countsBeforeReplay)
+
+            val replayAck = java.io.File(root, "desktop-ack-replay.json")
+            run(
+                "python3",
+                generationTool,
+                "consume-desktop",
+                published.absolutePath,
+                "--database",
+                desktopDb.absolutePath,
+                "--ack-output",
+                replayAck.absolutePath,
+            )
+            assertEquals(
+                countsBeforeReplay,
+                run(
+                    "sqlite3",
+                    desktopDb.absolutePath,
+                    "SELECT (SELECT count(*) FROM session_exercise_timeline WHERE session_id='$sessionId') || '|' || " +
+                        "(SELECT count(*) FROM heart_rate_samples WHERE capture_id='${capture.captureId}') || '|' || " +
+                        "(SELECT count(*) FROM heart_rate_rr_intervals WHERE capture_id='${capture.captureId}');",
+                ).trim(),
+            )
+            assertEquals(
+                "acknowledged",
+                service.acceptAcknowledgement(firstAck.readBytes()),
+            )
+            assertEquals(
+                0,
+                JSONObject(android.buildSessionTimelineV1Json()).getJSONArray("sessions").length(),
+            )
+            assertEquals(
+                0,
+                JSONObject(android.buildHeartRateV1Json()).getJSONArray("captures").length(),
+            )
+
+            val desktopFacts =
+                JSONObject(
+                    run(
+                        "sqlite3",
+                        desktopDb.absolutePath,
+                        "SELECT json_object(" +
+                            "'program_id',x.program_id,'program_session_id',x.program_session_id," +
+                            "'started_at',s.started_at,'ended_at',s.ended_at) FROM sessions s " +
+                            "JOIN program_session_executions x ON x.session_id=s.session_id " +
+                            "WHERE s.session_id='$sessionId' AND x.state='completed';",
+                    ).trim(),
+                )
+            assertEquals(programId, desktopFacts.getString("program_id"))
+            assertEquals(programSessionId, desktopFacts.getString("program_session_id"))
+            assertEquals(sessionStartedAt, desktopFacts.getString("started_at"))
+            assertEquals(sessionEndedAt, desktopFacts.getString("ended_at"))
+            assertEquals(
+                listOf(
+                    "$exerciseAStartedAt|$exerciseAEndedAt|${exerciseA.entryId}",
+                    "$exerciseBStartedAt|$exerciseBEndedAt|${exerciseBEntry.entryId}",
+                ),
+                run(
+                    "sqlite3",
+                    "-separator",
+                    "|",
+                    desktopDb.absolutePath,
+                    "SELECT started_at,ended_at,entry_id FROM session_exercise_timeline " +
+                        "WHERE session_id='$sessionId' ORDER BY started_at,entry_id;",
+                ).lineSequence().filter { it.isNotBlank() }.toList(),
+            )
+            assertEquals(
+                "session|$sessionId|$sessionStartedAt|$sessionEndedAt",
+                run(
+                    "sqlite3",
+                    "-separator",
+                    "|",
+                    desktopDb.absolutePath,
+                    "SELECT context_kind,context_id,started_at,ended_at " +
+                        "FROM heart_rate_captures WHERE capture_id='${capture.captureId}';",
+                ).trim(),
+            )
+            assertEquals(
+                listOf(
+                    "0|$preExerciseAt|",
+                    "1|$exerciseASampleAt|${exerciseA.entryId}",
+                    "2|$betweenExercisesAt|",
+                    "3|$exerciseBSampleAt|${exerciseBEntry.entryId}",
+                ),
+                run(
+                    "sqlite3",
+                    "-separator",
+                    "|",
+                    desktopDb.absolutePath,
+                    "SELECT sequence,observed_at,COALESCE(exercise_entry_id,'') " +
+                        "FROM heart_rate_samples " +
+                        "WHERE capture_id='${capture.captureId}' ORDER BY sequence;",
+                ).lineSequence().filter { it.isNotBlank() }.toList(),
+            )
+            assertEquals(
+                expectedRr,
+                run(
+                    "sqlite3",
+                    desktopDb.absolutePath,
+                    "SELECT value_1024 FROM heart_rate_rr_intervals " +
+                        "WHERE capture_id='${capture.captureId}' ORDER BY sample_sequence,rr_index;",
+                ).lineSequence().filter { it.isNotBlank() }.map { it.toInt() }.toList(),
+            )
+        } finally {
+            android.close()
+            context.deleteDatabase(androidName)
+            root.deleteRecursively()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/ProgramsProjectionRepositoryTest.kt

@@ -0,0 +1,347 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import java.util.UUID
+import com.labfytools.trainlog.model.ProgramSessionExecutionState
+import com.labfytools.trainlog.model.SessionSetDraft
+import org.json.JSONArray
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class ProgramsProjectionRepositoryTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    private fun program(title: String = "Cycle lisible"): JSONObject =
+        JSONObject()
+            .put("program_id", "pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")
+            .put("revision_id", "pgr_bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb")
+            .put("title", title)
+            .put("note", "Lecture seule")
+            .put("state", "active")
+            .put("start_date", "2026-09-21")
+            .put("end_date", JSONObject.NULL)
+            .put("created_at", "2026-09-18T10:00:00Z")
+            .put("updated_at", "2026-09-18T11:00:00Z")
+            .put("source_format", "trainlog-program")
+            .put("source_version", 1)
+            .put("source_payload_sha256", "a".repeat(64))
+            .put(
+                "sessions",
+                JSONArray().put(
+                    JSONObject()
+                        .put("program_session_id", "pgs_cccccccc-cccc-4ccc-8ccc-cccccccccccc")
+                        .put("title", "Séance A")
+                        .put("session_type", "training")
+                        .put("planned_for", JSONObject.NULL)
+                        .put("note", JSONObject.NULL)
+                        .put(
+                            "occurrences",
+                            JSONArray().put(
+                                JSONObject()
+                                    .put("entry_id", "pge_dddddddd-dddd-4ddd-8ddd-dddddddddddd")
+                                    .put("exercise_id", "ex_eeeeeeee-eeee-4eee-8eee-eeeeeeeeeeee")
+                                    .put("equipment_id", JSONObject.NULL)
+                                    .put("load_mode", "external")
+                                    .put("rest_seconds", 90)
+                                    .put("target_sets", 3)
+                                    .put("target_reps", 8)
+                                    .put("target_duration_seconds", JSONObject.NULL)
+                                    .put("target_weight_kg", 40.0)
+                                    .put("notes", JSONObject.NULL),
+                            ),
+                        ),
+                ),
+            )
+
+    private fun artifact(programs: JSONArray, deletions: JSONArray = JSONArray()): String =
+        JSONObject()
+            .put("format", "trainlog-programs")
+            .put("version", 1)
+            .put("generated_at", "2026-09-18T12:00:00Z")
+            .put("programs", programs)
+            .put("deletions", deletions)
+            .toString()
+
+    private fun preparationArtifact(
+        includeProgramProvenance: Boolean = true,
+        deliveryState: String = "pending",
+    ): String {
+        val occurrence =
+            JSONObject()
+                .put("entry_id", "spe_11111111-1111-4111-8111-111111111111")
+                .put("position", 0)
+                .put("exercise_id", "ex_eeeeeeee-eeee-4eee-8eee-eeeeeeeeeeee")
+                .put("equipment_id", JSONObject.NULL)
+                .put("recording_mode", "sets")
+                .put("tracking_mode", "reps")
+                .put("data_fields", 0)
+                .put("load_mode", "external")
+                .put("rest_seconds", 90)
+                .put("target_sets", 3)
+                .put("target_reps", 8)
+                .put("target_duration_seconds", JSONObject.NULL)
+                .put("target_weight_kg", 40.0)
+                .put("notes", JSONObject.NULL)
+        val delivery =
+            JSONObject()
+                .put("delivery_id", "spd_22222222-2222-4222-8222-222222222222")
+                .put("preparation_id", "sp_33333333-3333-4333-8333-333333333333")
+                .put("revision_id", "spr_44444444-4444-4444-8444-444444444444")
+                .put("execution_session_id", "se_55555555-5555-4555-8555-555555555555")
+                .put("state", deliveryState)
+                .put("title", "Séance A")
+                .put("session_type", "training")
+                .put("planned_for", JSONObject.NULL)
+                .put("notes", JSONObject.NULL)
+                .put("source_proposal_id", JSONObject.NULL)
+                .put("source_payload_sha256", JSONObject.NULL)
+                .put("occurrences", JSONArray().put(occurrence))
+        if (includeProgramProvenance) {
+            delivery
+                .put("source_program_id", "pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")
+                .put(
+                    "source_program_session_id",
+                    "pgs_cccccccc-cccc-4ccc-8ccc-cccccccccccc",
+                )
+        }
+        return JSONObject()
+            .put("format", "trainlog-session-preparations")
+            .put("version", 2)
+            .put("generated_at", "2026-09-18T12:05:00Z")
+            .put("deliveries", JSONArray().put(delivery))
+            .put("withdrawals", JSONArray())
+            .toString()
+    }
+
+    private fun deletion(): JSONObject =
+        JSONObject()
+            .put("deletion_id", "pgd_ffffffff-ffff-4fff-8fff-ffffffffffff")
+            .put("program_id", "pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")
+            .put("predecessor_revision_id", "pgr_bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb")
+            .put("revision_id", "pgr_11111111-1111-4111-8111-111111111111")
+            .put("requested_at", "2026-09-18T12:30:00Z")
+
+    @Test
+    fun projectionReplayConflictDeletionAndRestartAreDurable() {
+        val name = "programs-${UUID.randomUUID()}.db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            assertEquals(ProgramsImportResult.Applied(1, 0, 0), repository.applyProgramsV1Json(artifact(JSONArray().put(program()))))
+            assertEquals(ProgramsImportResult.Applied(0, 0, 1), repository.applyProgramsV1Json(artifact(JSONArray().put(program()))))
+            val summary = repository.listSyncedPrograms().single()
+            assertEquals(1, summary.sessionCount)
+            val detail = repository.getSyncedProgram(summary.programId)!!
+            assertEquals("ex_eeeeeeee-eeee-4eee-8eee-eeeeeeeeeeee", detail.sessions.single().occurrences.single().exerciseName)
+
+            val conflict = repository.applyProgramsV1Json(artifact(JSONArray().put(program("Divergent"))))
+            assertTrue(conflict is ProgramsImportResult.Invalid)
+            assertEquals("Cycle lisible", repository.listSyncedPrograms().single().title)
+
+            assertEquals(ProgramsImportResult.Applied(0, 1, 0), repository.applyProgramsV1Json(artifact(JSONArray(), JSONArray().put(deletion()))))
+            assertTrue(repository.listSyncedPrograms().isEmpty())
+        } finally {
+            repository.close()
+        }
+
+        repository = TrainlogRepository(context, name)
+        try {
+            assertEquals(ProgramsImportResult.Applied(0, 0, 1), repository.applyProgramsV1Json(artifact(JSONArray().put(program()))))
+            assertTrue(repository.listSyncedPrograms().isEmpty())
+            assertTrue(repository.listEquipment().isNotEmpty())
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun malformedNestedDocumentDoesNotPartiallyDelete() {
+        val name = "programs-invalid-${UUID.randomUUID()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            repository.applyProgramsV1Json(artifact(JSONArray().put(program())))
+            val malformed = program().apply { getJSONArray("sessions").getJSONObject(0).remove("title") }
+            val result = repository.applyProgramsV1Json(artifact(JSONArray().put(malformed), JSONArray().put(deletion())))
+            assertTrue(result is ProgramsImportResult.Invalid)
+            assertEquals(1, repository.listSyncedPrograms().size)
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun programSessionStartsResumesCompletesAndKeepsProvenanceAcrossRestart() {
+        val name = "program-execution-${UUID.randomUUID()}.db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            val catalog = JSONObject()
+                .put("format", "trainlog-pc-catalog")
+                .put("version", 1)
+                .put("exercises", JSONArray().put(
+                    JSONObject()
+                        .put("exercise_id", "ex_eeeeeeee-eeee-4eee-8eee-eeeeeeeeeeee")
+                        .put("name", "Exercise fixture")
+                        .put("recording_mode", "sets")
+                        .put("tracking_mode", "reps")
+                        .put("data_fields", 0),
+                ))
+                .toString()
+            assertTrue(repository.applyPcCatalogJson(catalog) is PcCatalogImportResult.Applied)
+            repository.applyProgramsV1Json(artifact(JSONArray().put(program())))
+            val programId = "pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"
+            val programSessionId = "pgs_cccccccc-cccc-4ccc-8ccc-cccccccccccc"
+
+            assertEquals(
+                StartProgramSessionResult.Started,
+                repository.startSyncedProgramSession(programId, programSessionId),
+            )
+            assertEquals(
+                StartProgramSessionResult.AlreadyActive,
+                repository.startSyncedProgramSession(programId, programSessionId),
+            )
+            val active = (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            assertEquals(programId, active.sourceProgramId)
+            assertEquals(programSessionId, active.sourceProgramSessionId)
+            val performed = active.copy(
+                exercises = active.exercises.map { occurrence ->
+                    occurrence.copy(sets = listOf(SessionSetDraft(reps = 8, weightKg = 40.0)))
+                },
+            )
+            assertEquals(ActiveDraftMutationResult.Saved, repository.saveActiveSessionDraft(performed))
+            assertTrue(repository.finalizeActiveSessionDraft() is FinalizeActiveDraftResult.Saved)
+            assertEquals(
+                ProgramSessionExecutionState.COMPLETED,
+                repository.getSyncedProgram(programId)!!.sessions.single().executionState,
+            )
+            assertEquals(
+                StartProgramSessionResult.AlreadyCompleted,
+                repository.startSyncedProgramSession(programId, programSessionId),
+            )
+            val exported = JSONObject(repository.buildProgramExecutionsV1Json())
+            val execution = exported.getJSONArray("executions").getJSONObject(0)
+            assertEquals("completed", execution.getString("state"))
+            assertEquals(programSessionId, execution.getString("program_session_id"))
+        } finally {
+            repository.close()
+        }
+
+        repository = TrainlogRepository(context, name)
+        try {
+            val detail = repository.listSyncedPrograms().single()
+            assertEquals(1, detail.sessionCount)
+            assertTrue(repository.loadActiveSessionDraft() is ActiveDraftLoadResult.None)
+            assertEquals(1, repository.listSessions().size)
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun deliveredProgramPreparationCompletesProgramProgressAcrossRestart() {
+        val name = "program-delivery-${UUID.randomUUID()}.db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            val catalog =
+                JSONObject()
+                    .put("format", "trainlog-pc-catalog")
+                    .put("version", 1)
+                    .put(
+                        "exercises",
+                        JSONArray().put(
+                            JSONObject()
+                                .put("exercise_id", "ex_eeeeeeee-eeee-4eee-8eee-eeeeeeeeeeee")
+                                .put("name", "Exercise fixture")
+                                .put("recording_mode", "sets")
+                                .put("tracking_mode", "reps")
+                                .put("data_fields", 0),
+                        ),
+                    )
+                    .toString()
+            assertTrue(repository.applyPcCatalogJson(catalog) is PcCatalogImportResult.Applied)
+            assertEquals(
+                ProgramsImportResult.Applied(1, 0, 0),
+                repository.applyProgramsV1Json(artifact(JSONArray().put(program()))),
+            )
+            assertEquals(
+                AiSessionDraftImportResult.Applied(1, 0),
+                repository.applySessionPreparationsJson(
+                    preparationArtifact(includeProgramProvenance = false),
+                ),
+            )
+            assertEquals(
+                StartAiSessionDraftResult.Started,
+                repository.startPreparedSession("spd_22222222-2222-4222-8222-222222222222"),
+            )
+            val active =
+                (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+            assertEquals(null, active.sourceProgramId)
+            assertEquals(null, active.sourceProgramSessionId)
+            val performed =
+                active.copy(
+                    exercises =
+                        active.exercises.map { occurrence ->
+                            occurrence.copy(
+                                sets = listOf(SessionSetDraft(reps = 8, weightKg = 40.0)),
+                            )
+                        },
+                )
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(performed),
+            )
+            assertTrue(repository.finalizeActiveSessionDraft() is FinalizeActiveDraftResult.Saved)
+            assertEquals(
+                ProgramSessionExecutionState.TODO,
+                repository.getSyncedProgram("pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")!!
+                    .sessions.single().executionState,
+            )
+            assertEquals(
+                AiSessionDraftImportResult.Applied(0, 1),
+                repository.applySessionPreparationsJson(
+                    preparationArtifact(deliveryState = "remote_unknown"),
+                ),
+            )
+            val detail = repository.getSyncedProgram("pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")!!
+            assertEquals(ProgramSessionExecutionState.COMPLETED, detail.sessions.single().executionState)
+            val execution =
+                JSONObject(repository.buildProgramExecutionsV1Json())
+                    .getJSONArray("executions")
+                    .getJSONObject(0)
+            assertEquals("completed", execution.getString("state"))
+            assertEquals(
+                "pgs_cccccccc-cccc-4ccc-8ccc-cccccccccccc",
+                execution.getString("program_session_id"),
+            )
+        } finally {
+            repository.close()
+        }
+
+        repository = TrainlogRepository(context, name)
+        try {
+            val detail = repository.getSyncedProgram("pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")!!
+            assertEquals(1, detail.sessions.count {
+                it.executionState == ProgramSessionExecutionState.COMPLETED
+            })
+            assertEquals(
+                StartProgramSessionResult.AlreadyCompleted,
+                repository.startSyncedProgramSession(
+                    "pg_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa",
+                    "pgs_cccccccc-cccc-4ccc-8ccc-cccccccccccc",
+                ),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/SessionPreparationExchangeTest.kt

@@ -0,0 +1,434 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.TrackingMode
+import org.json.JSONArray
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SessionPreparationExchangeTest {
+    private val context = ApplicationProvider.getApplicationContext<Context>()
+
+    private fun artifact(repository: TrainlogRepository): String {
+        val exercise = repository.listExercises().first { it.recordingMode.wireValue == "sets" }
+        val occurrence =
+            JSONObject()
+                .put("entry_id", "spe_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")
+                .put("position", 0)
+                .put("exercise_id", exercise.exerciseId)
+                .put("equipment_id", JSONObject.NULL)
+                .put("recording_mode", exercise.recordingMode.wireValue)
+                .put("tracking_mode", exercise.trackingMode.wireValue)
+                .put("data_fields", exercise.dataFields)
+                .put("load_mode", "none")
+                .put("rest_seconds", 60)
+                .put("target_sets", 2)
+                .put("target_reps", if (exercise.trackingMode.wireValue == "reps") 8 else JSONObject.NULL)
+                .put(
+                    "target_duration_seconds",
+                    if (exercise.trackingMode.wireValue == "duration") 45 else JSONObject.NULL,
+                )
+                .put("target_weight_kg", JSONObject.NULL)
+                .put("notes", JSONObject.NULL)
+        val delivery =
+            JSONObject()
+                .put("delivery_id", "spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")
+                .put("preparation_id", "sp_bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb")
+                .put("revision_id", "spr_cccccccc-cccc-4ccc-8ccc-cccccccccccc")
+                .put("execution_session_id", "se_dddddddd-dddd-4ddd-8ddd-dddddddddddd")
+                .put("state", "pending")
+                .put("title", "Préparation contrôlée")
+                .put("session_type", "training")
+                .put("planned_for", "2026-09-20")
+                .put("notes", "Sans faits réalisés")
+                .put("source_proposal_id", JSONObject.NULL)
+                .put("source_payload_sha256", JSONObject.NULL)
+                .put("occurrences", JSONArray().put(occurrence))
+        return JSONObject()
+            .put("format", "trainlog-session-preparations")
+            .put("version", 1)
+            .put("generated_at", "2026-09-17T20:00:00Z")
+            .put("deliveries", JSONArray().put(delivery))
+            .toString()
+    }
+
+    private fun withdrawalArtifact(): String {
+        val delivery =
+            JSONObject()
+                .put("delivery_id", "spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa")
+                .put("revision_id", "spr_cccccccc-cccc-4ccc-8ccc-cccccccccccc")
+                .put("execution_session_id", "se_dddddddd-dddd-4ddd-8ddd-dddddddddddd")
+        val withdrawal =
+            JSONObject()
+                .put("withdrawal_id", "spw_eeeeeeee-eeee-4eee-8eee-eeeeeeeeeeee")
+                .put("preparation_id", "sp_bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb")
+                .put("revision_id", "spr_cccccccc-cccc-4ccc-8ccc-cccccccccccc")
+                .put("requested_at", "2026-09-18T12:00:00Z")
+                .put("deliveries", JSONArray().put(delivery))
+        return JSONObject()
+            .put("format", "trainlog-session-preparations")
+            .put("version", 2)
+            .put("generated_at", "2026-09-18T12:01:00Z")
+            .put("deliveries", JSONArray())
+            .put("withdrawals", JSONArray().put(withdrawal))
+            .toString()
+    }
+
+    private fun scalarText(name: String, sql: String): String {
+        val path = context.getDatabasePath(name)
+        return SQLiteDatabase.openDatabase(path.absolutePath, null, SQLiteDatabase.OPEN_READONLY).use { db ->
+            db.rawQuery(sql, null).use { cursor ->
+                assertTrue(cursor.moveToFirst())
+                cursor.getString(0)
+            }
+        }
+    }
+
+    private fun scalarInt(name: String, sql: String): Int {
+        val path = context.getDatabasePath(name)
+        return SQLiteDatabase.openDatabase(path.absolutePath, null, SQLiteDatabase.OPEN_READONLY).use { db ->
+            db.rawQuery(sql, null).use { cursor ->
+                assertTrue(cursor.moveToFirst())
+                cursor.getInt(0)
+            }
+        }
+    }
+
+    @Test
+    fun startingMixedPreparationCopiesTargetsWithoutPerformedRows() {
+        val name = "prepared-mixed-${System.nanoTime()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            assertTrue(
+                repository.createExercise(
+                    NewExerciseProfile(
+                        name = "Test prepared walk",
+                        recordingMode = RecordingMode.CONTINUOUS,
+                        trackingMode = TrackingMode.DURATION,
+                        dataFields = 0,
+                    ),
+                ) is CreateExerciseResult.Created,
+            )
+            assertTrue(
+                repository.createExercise(
+                    NewExerciseProfile(
+                        name = "Test prepared press",
+                        recordingMode = RecordingMode.SETS,
+                        trackingMode = TrackingMode.REPS,
+                        dataFields = 0,
+                    ),
+                ) is CreateExerciseResult.Created,
+            )
+            val continuous = repository.listExercises().single { it.name == "Test prepared walk" }
+            val sets = repository.listExercises().single { it.name == "Test prepared press" }
+            val payload = JSONObject(artifact(repository))
+            val delivery = payload.getJSONArray("deliveries").getJSONObject(0)
+            delivery.put(
+                "occurrences",
+                JSONArray()
+                    .put(
+                        JSONObject()
+                            .put("entry_id", "spe_11111111-1111-4111-8111-111111111111")
+                            .put("position", 0)
+                            .put("exercise_id", continuous.exerciseId)
+                            .put("equipment_id", JSONObject.NULL)
+                            .put("recording_mode", "continuous")
+                            .put("tracking_mode", "duration")
+                            .put("data_fields", continuous.dataFields)
+                            .put("load_mode", "none")
+                            .put("rest_seconds", 0)
+                            .put("target_sets", JSONObject.NULL)
+                            .put("target_reps", JSONObject.NULL)
+                            .put("target_duration_seconds", 600)
+                            .put("target_weight_kg", JSONObject.NULL)
+                            .put("notes", "Target only"),
+                    )
+                    .put(
+                        JSONObject()
+                            .put("entry_id", "spe_22222222-2222-4222-8222-222222222222")
+                            .put("position", 1)
+                            .put("exercise_id", sets.exerciseId)
+                            .put("equipment_id", JSONObject.NULL)
+                            .put("recording_mode", "sets")
+                            .put("tracking_mode", "reps")
+                            .put("data_fields", sets.dataFields)
+                            .put("load_mode", "external")
+                            .put("rest_seconds", 90)
+                            .put("target_sets", 3)
+                            .put("target_reps", 10)
+                            .put("target_duration_seconds", JSONObject.NULL)
+                            .put("target_weight_kg", 52.0)
+                            .put("notes", JSONObject.NULL),
+                    ),
+            )
+
+            assertEquals(
+                AiSessionDraftImportResult.Applied(1, 0),
+                repository.applySessionPreparationsJson(payload.toString()),
+            )
+            assertEquals(
+                StartAiSessionDraftResult.Started,
+                repository.startPreparedSession("spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"),
+            )
+            val loadResult = repository.loadActiveSessionDraft()
+            assertTrue(loadResult.toString(), loadResult is ActiveDraftLoadResult.Loaded)
+            val active = loadResult as ActiveDraftLoadResult.Loaded
+            assertEquals(2, active.draft.exercises.size)
+            assertEquals(600, active.draft.exercises[0].plan?.durationSeconds)
+            assertEquals(0, active.draft.exercises[0].continuousDurationSeconds)
+            assertEquals(3, active.draft.exercises[1].plan?.sets)
+            assertEquals(10, active.draft.exercises[1].plan?.reps)
+            assertEquals(52.0, active.draft.exercises[1].plan?.weightKg)
+            assertTrue(active.draft.exercises[1].sets.isEmpty())
+            assertEquals(1, scalarInt(name, "SELECT COUNT(*) FROM active_session_draft"))
+            assertEquals(0, scalarInt(name, "SELECT COUNT(*) FROM draft_continuous_activity"))
+            assertEquals(0, scalarInt(name, "SELECT COUNT(*) FROM draft_performed_sets"))
+            assertEquals(0, scalarInt(name, "SELECT COUNT(*) FROM draft_max_results"))
+            assertEquals(0, scalarInt(name, "SELECT COUNT(*) FROM draft_exercise_feedback"))
+            assertEquals(0, scalarInt(name, "SELECT COUNT(*) FROM sessions"))
+            assertEquals("ok", scalarText(name, "PRAGMA integrity_check"))
+            assertEquals(0, scalarInt(name, "SELECT COUNT(*) FROM pragma_foreign_key_check"))
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun deliveryReplaysStartsExplicitlyAndNeverOverwritesActiveDraft() {
+        val name = "prepared-${System.nanoTime()}.db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            assertTrue(repository.createExercise(NewExerciseProfile(
+                name = "Test preparation exercise",
+                recordingMode = RecordingMode.SETS,
+                trackingMode = TrackingMode.REPS,
+                dataFields = 0,
+            )) is CreateExerciseResult.Created)
+            val payload = artifact(repository)
+            assertEquals(AiSessionDraftImportResult.Applied(1, 0), repository.applySessionPreparationsJson(payload))
+            assertEquals(AiSessionDraftImportResult.Applied(0, 1), repository.applySessionPreparationsJson(payload))
+            assertEquals(1, repository.listPreparedSessions().size)
+            assertEquals(ActiveDraftMutationResult.Saved, repository.startActiveSessionDraft())
+            assertEquals(
+                StartAiSessionDraftResult.ExistingActiveDraft,
+                repository.startPreparedSession("spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"),
+            )
+            repository.close()
+            context.deleteDatabase(name)
+            repository = TrainlogRepository(context, name)
+            assertTrue(repository.createExercise(NewExerciseProfile(
+                name = "Test preparation exercise",
+                recordingMode = RecordingMode.SETS,
+                trackingMode = TrackingMode.REPS,
+                dataFields = 0,
+            )) is CreateExerciseResult.Created)
+            val reloadedPayload = artifact(repository)
+            assertEquals(AiSessionDraftImportResult.Applied(1, 0), repository.applySessionPreparationsJson(reloadedPayload))
+            assertEquals(
+                StartAiSessionDraftResult.Started,
+                repository.startPreparedSession("spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"),
+            )
+            val active = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals("se_dddddddd-dddd-4ddd-8ddd-dddddddddddd", active.draft.sessionId)
+            assertTrue(active.draft.exercises.all { it.sets.isEmpty() })
+            assertEquals(
+                StartAiSessionDraftResult.ExistingActiveDraft,
+                repository.startPreparedSession("spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun withdrawalCancelsOnlyPendingDeliveryAndPreventsOlderReplayResurrection() {
+        val name = "prepared-withdraw-pending-${System.nanoTime()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            assertTrue(repository.createExercise(NewExerciseProfile(
+                name = "Test pending withdrawal",
+                recordingMode = RecordingMode.SETS,
+                trackingMode = TrackingMode.REPS,
+                dataFields = 0,
+            )) is CreateExerciseResult.Created)
+            val delivery = artifact(repository)
+            val withdrawal = withdrawalArtifact()
+            assertEquals(AiSessionDraftImportResult.Applied(1, 0), repository.applySessionPreparationsJson(delivery))
+            val invalidWithdrawal = JSONObject(withdrawal)
+            invalidWithdrawal.getJSONArray("withdrawals").getJSONObject(0)
+                .put("withdrawal_id", "spw_invalid")
+            assertTrue(repository.applySessionPreparationsJson(invalidWithdrawal.toString()) is AiSessionDraftImportResult.Invalid)
+            assertEquals(1, repository.listPreparedSessions().size)
+            assertEquals(AiSessionDraftImportResult.Applied(0, 0), repository.applySessionPreparationsJson(withdrawal))
+            assertTrue(repository.listPreparedSessions().isEmpty())
+            assertEquals(
+                StartAiSessionDraftResult.NotPending,
+                repository.startPreparedSession("spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"),
+            )
+            assertEquals(AiSessionDraftImportResult.Applied(0, 0), repository.applySessionPreparationsJson(withdrawal))
+            assertEquals(AiSessionDraftImportResult.Applied(0, 1), repository.applySessionPreparationsJson(delivery))
+            assertTrue(repository.listPreparedSessions().isEmpty())
+            repository.close()
+            assertEquals(
+                "cancelled",
+                scalarText(name, "SELECT state FROM session_preparation_deliveries"),
+            )
+            assertEquals(
+                "pending_cancelled",
+                scalarText(name, "SELECT result FROM session_preparation_withdrawals"),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun withdrawalPreservesStartedDeliveryAndActiveExecutionIdentity() {
+        val name = "prepared-withdraw-started-${System.nanoTime()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            assertTrue(repository.createExercise(NewExerciseProfile(
+                name = "Test started withdrawal",
+                recordingMode = RecordingMode.SETS,
+                trackingMode = TrackingMode.REPS,
+                dataFields = 0,
+            )) is CreateExerciseResult.Created)
+            assertEquals(
+                AiSessionDraftImportResult.Applied(1, 0),
+                repository.applySessionPreparationsJson(artifact(repository)),
+            )
+            assertEquals(
+                StartAiSessionDraftResult.Started,
+                repository.startPreparedSession("spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"),
+            )
+            val before = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(AiSessionDraftImportResult.Applied(0, 0), repository.applySessionPreparationsJson(withdrawalArtifact()))
+            val after = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(before.draft.sessionId, after.draft.sessionId)
+            assertEquals("se_dddddddd-dddd-4ddd-8ddd-dddddddddddd", after.draft.sessionId)
+            repository.close()
+            assertEquals(
+                "started",
+                scalarText(name, "SELECT state FROM session_preparation_deliveries"),
+            )
+            assertEquals(
+                "execution_preserved",
+                scalarText(name, "SELECT result FROM session_preparation_withdrawals"),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun version22MigrationAddsWithdrawalLedgerWithoutChangingDeliveries() {
+        val name = "prepared-withdraw-migration-${System.nanoTime()}.db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            assertTrue(repository.createExercise(NewExerciseProfile(
+                name = "Test withdrawal migration",
+                recordingMode = RecordingMode.SETS,
+                trackingMode = TrackingMode.REPS,
+                dataFields = 0,
+            )) is CreateExerciseResult.Created)
+            val delivery = artifact(repository)
+            assertEquals(AiSessionDraftImportResult.Applied(1, 0), repository.applySessionPreparationsJson(delivery))
+            repository.close()
+            SQLiteDatabase.openDatabase(
+                context.getDatabasePath(name).absolutePath,
+                null,
+                SQLiteDatabase.OPEN_READWRITE,
+            ).use { db ->
+                db.execSQL("DROP TABLE session_preparation_withdrawals")
+                db.execSQL("PRAGMA user_version=22")
+            }
+            repository = TrainlogRepository(context, name)
+            assertEquals(1, repository.listPreparedSessions().size)
+            repository.close()
+            assertEquals("33", scalarText(name, "PRAGMA user_version"))
+            assertEquals(
+                "0",
+                scalarText(name, "SELECT COUNT(*) FROM session_preparation_withdrawals"),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun withdrawalCancelsAllPendingTargetDeliveriesButPreservesStartedAndWitnessRows() {
+        val name = "prepared-withdraw-multiple-${System.nanoTime()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            assertTrue(repository.createExercise(NewExerciseProfile(
+                name = "Test multiple withdrawal",
+                recordingMode = RecordingMode.SETS,
+                trackingMode = TrackingMode.REPS,
+                dataFields = 0,
+            )) is CreateExerciseResult.Created)
+            val deliveryRoot = JSONObject(artifact(repository))
+            val targetTemplate = deliveryRoot.getJSONArray("deliveries").getJSONObject(0)
+            val secondTarget = JSONObject(targetTemplate.toString())
+                .put("delivery_id", "spd_11111111-1111-4111-8111-111111111111")
+                .put("execution_session_id", "se_11111111-1111-4111-8111-111111111111")
+            val witness = JSONObject(targetTemplate.toString())
+                .put("delivery_id", "spd_22222222-2222-4222-8222-222222222222")
+                .put("preparation_id", "sp_22222222-2222-4222-8222-222222222222")
+                .put("revision_id", "spr_22222222-2222-4222-8222-222222222222")
+                .put("execution_session_id", "se_22222222-2222-4222-8222-222222222222")
+                .put("title", "Préparation témoin")
+            deliveryRoot.getJSONArray("deliveries").put(secondTarget).put(witness)
+            assertEquals(
+                AiSessionDraftImportResult.Applied(3, 0),
+                repository.applySessionPreparationsJson(deliveryRoot.toString()),
+            )
+            assertEquals(
+                StartAiSessionDraftResult.Started,
+                repository.startPreparedSession("spd_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"),
+            )
+            val withdrawalRoot = JSONObject(withdrawalArtifact())
+            withdrawalRoot.getJSONArray("withdrawals").getJSONObject(0)
+                .getJSONArray("deliveries")
+                .put(
+                    JSONObject()
+                        .put("delivery_id", "spd_11111111-1111-4111-8111-111111111111")
+                        .put("revision_id", "spr_cccccccc-cccc-4ccc-8ccc-cccccccccccc")
+                        .put("execution_session_id", "se_11111111-1111-4111-8111-111111111111"),
+                )
+            assertEquals(
+                AiSessionDraftImportResult.Applied(0, 0),
+                repository.applySessionPreparationsJson(withdrawalRoot.toString()),
+            )
+            assertEquals(
+                listOf("spd_22222222-2222-4222-8222-222222222222"),
+                repository.listPreparedSessions().map { it.deliveryId },
+            )
+            val active = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals("se_dddddddd-dddd-4ddd-8ddd-dddddddddddd", active.draft.sessionId)
+            repository.close()
+            assertEquals(1, scalarInt(name, "SELECT COUNT(*) FROM session_preparation_deliveries WHERE state='started'"))
+            assertEquals(1, scalarInt(name, "SELECT COUNT(*) FROM session_preparation_deliveries WHERE state='cancelled'"))
+            assertEquals(1, scalarInt(name, "SELECT COUNT(*) FROM session_preparation_deliveries WHERE state='pending'"))
+            assertEquals("execution_preserved", scalarText(name, "SELECT result FROM session_preparation_withdrawals"))
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/SessionTimelineRepositoryTest.kt

@@ -0,0 +1,458 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionSetDraft
+import com.labfytools.trainlog.model.TrackingMode
+import java.time.OffsetDateTime
+import java.util.UUID
+import org.json.JSONArray
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SessionTimelineRepositoryTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun startedOccurrenceCannotBeRemovedOrSilentlyClosedBySessionFinalization() {
+        val name = "timeline-guard-" + UUID.randomUUID() + ".db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            val exercise =
+                (repository.createExercise(
+                    NewExerciseProfile(
+                        "Timeline guarded exercise",
+                        RecordingMode.SETS,
+                        TrackingMode.REPS,
+                        0,
+                    ),
+                ) as CreateExerciseResult.Created).exercise
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.startActiveSessionDraft(),
+            )
+            val opened =
+                repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            val occurrence =
+                SessionExerciseDraft(
+                    exercise = exercise,
+                    sets = listOf(SessionSetDraft(reps = 5)),
+                )
+            val activeDraft = opened.draft.copy(exercises = listOf(occurrence))
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(activeDraft),
+            )
+            assertTrue(
+                repository.startActiveSessionExercise(occurrence.entryId) is
+                    TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+
+            val removed = repository.saveActiveSessionDraft(activeDraft.copy(exercises = emptyList()))
+            assertTrue(removed is ActiveDraftMutationResult.Error)
+            val finalize = repository.finalizeActiveSessionDraft()
+            assertTrue(finalize is FinalizeActiveDraftResult.Invalid)
+            assertTrue(
+                (finalize as FinalizeActiveDraftResult.Invalid)
+                    .message
+                    .startsWith("ACTIVE_EXERCISE:"),
+            )
+
+            assertTrue(
+                repository.finishActiveSessionExercise(occurrence.entryId) is
+                    TrainlogRepository.SessionExerciseTimingResult.Finished,
+            )
+            assertTrue(
+                repository.finalizeActiveSessionDraft() is
+                    FinalizeActiveDraftResult.Saved,
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun trainingTimelineCorrelatesMeasuredSamplesWithoutInventingRestOwner() {
+        val name = "timeline-${UUID.randomUUID()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            fun exercise(label: String) =
+                (repository.createExercise(
+                    NewExerciseProfile(label, RecordingMode.SETS, TrackingMode.REPS, 0),
+                ) as CreateExerciseResult.Created).exercise
+
+            val first = exercise("Timeline A")
+            val second = exercise("Timeline B")
+            assertEquals(ActiveDraftMutationResult.Saved, repository.startActiveSessionDraft())
+            val opened = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            val firstEntry = SessionExerciseDraft(
+                exercise = first,
+                sets = listOf(SessionSetDraft(reps = 10)),
+            )
+            val secondEntry = SessionExerciseDraft(
+                exercise = second,
+                sets = listOf(SessionSetDraft(reps = 10)),
+            )
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    opened.draft.copy(exercises = listOf(firstEntry, secondEntry)),
+                ),
+            )
+
+            val startA = OffsetDateTime.now().toString()
+            val startedA = repository.startActiveSessionExercise(firstEntry.entryId, startA)
+            assertTrue(startedA is TrainlogRepository.SessionExerciseTimingResult.Started)
+            val conflict = repository.startActiveSessionExercise(secondEntry.entryId)
+            assertEquals(
+                firstEntry.entryId,
+                (conflict as TrainlogRepository.SessionExerciseTimingResult.ActiveConflict).activeEntryId,
+            )
+
+            val measurement = ParsedHeartRateMeasurement(
+                bpm = 101,
+                sensorContactDetected = null,
+                energyExpended = null,
+                rrIntervals1024 = listOf(620),
+            )
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR", OffsetDateTime.now().toString(), measurement,
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            assertTrue(
+                repository.finishActiveSessionExercise(firstEntry.entryId)
+                    is TrainlogRepository.SessionExerciseTimingResult.Finished,
+            )
+
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR", OffsetDateTime.now().toString(), measurement.copy(bpm = 88),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            assertTrue(
+                repository.startActiveSessionExercise(secondEntry.entryId)
+                    is TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR", OffsetDateTime.now().toString(), measurement.copy(bpm = 109),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            assertTrue(
+                repository.finishActiveSessionExercise(secondEntry.entryId)
+                    is TrainlogRepository.SessionExerciseTimingResult.Finished,
+            )
+            val finalized = repository.finalizeActiveSessionDraft()
+            assertTrue(finalized is FinalizeActiveDraftResult.Saved)
+
+            val timeline = JSONObject(repository.buildSessionTimelineV1Json())
+            val session = timeline.getJSONArray("sessions").getJSONObject(0)
+            assertEquals(2, session.getJSONArray("exercises").length())
+            assertEquals(firstEntry.entryId, session.getJSONArray("exercises").getJSONObject(0).getString("entry_id"))
+            assertEquals(secondEntry.entryId, session.getJSONArray("exercises").getJSONObject(1).getString("entry_id"))
+
+            val heart = JSONObject(repository.buildHeartRateV1Json())
+            val samples = heart.getJSONArray("captures").getJSONObject(0).getJSONArray("samples")
+            assertEquals(3, samples.length())
+            assertEquals(firstEntry.entryId, samples.getJSONObject(0).getString("exercise_entry_id"))
+            assertTrue(samples.getJSONObject(1).isNull("exercise_entry_id"))
+            assertEquals(secondEntry.entryId, samples.getJSONObject(2).getString("exercise_entry_id"))
+            assertEquals(101, samples.getJSONObject(0).getInt("bpm"))
+            assertEquals(88, samples.getJSONObject(1).getInt("bpm"))
+            assertEquals(109, samples.getJSONObject(2).getInt("bpm"))
+            assertNull(repository.activeHeartRateCapture())
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun programSessionFinalizesMeasuredContinuousTargetAndExtraPerformedSet() {
+        val name = "program-session-finish-${UUID.randomUUID()}.db"
+        val repository = TrainlogRepository(context, name)
+        try {
+            val programId = "pg_11111111-1111-4111-8111-111111111111"
+            val programSessionId = "pgs_22222222-2222-4222-8222-222222222222"
+            val warmupId = "ex_33333333-3333-4333-8333-333333333333"
+            val rowId = "ex_44444444-4444-4444-8444-444444444444"
+            val pressId = "ex_55555555-5555-4555-8555-555555555555"
+            val curlId = "ex_66666666-6666-4666-8666-666666666666"
+
+            fun catalogExercise(
+                exerciseId: String,
+                exerciseName: String,
+                recordingMode: String,
+                trackingMode: String,
+            ) =
+                JSONObject()
+                    .put("exercise_id", exerciseId)
+                    .put("name", exerciseName)
+                    .put("recording_mode", recordingMode)
+                    .put("tracking_mode", trackingMode)
+                    .put("data_fields", 0)
+
+            val catalog =
+                JSONObject()
+                    .put("format", "trainlog-pc-catalog")
+                    .put("version", 1)
+                    .put(
+                        "exercises",
+                        JSONArray()
+                            .put(catalogExercise(warmupId, "Program warmup", "continuous", "duration"))
+                            .put(catalogExercise(rowId, "Program row", "sets", "reps"))
+                            .put(catalogExercise(pressId, "Program press", "sets", "reps"))
+                            .put(catalogExercise(curlId, "Program arm curl", "sets", "reps")),
+                    )
+                    .toString()
+            assertTrue(repository.applyPcCatalogJson(catalog) is PcCatalogImportResult.Applied)
+
+            fun occurrence(
+                entryId: String,
+                exerciseId: String,
+                targetSets: Int?,
+                targetReps: Int?,
+                targetDuration: Int?,
+                targetWeight: Double?,
+                restSeconds: Int,
+            ) =
+                JSONObject()
+                    .put("entry_id", entryId)
+                    .put("exercise_id", exerciseId)
+                    .put("equipment_id", JSONObject.NULL)
+                    .put("load_mode", if (targetWeight == null) "none" else "external")
+                    .put("rest_seconds", restSeconds)
+                    .put("target_sets", targetSets ?: JSONObject.NULL)
+                    .put("target_reps", targetReps ?: JSONObject.NULL)
+                    .put("target_duration_seconds", targetDuration ?: JSONObject.NULL)
+                    .put("target_weight_kg", targetWeight ?: JSONObject.NULL)
+                    .put("notes", JSONObject.NULL)
+
+            val program =
+                JSONObject()
+                    .put("program_id", programId)
+                    .put("revision_id", "pgr_77777777-7777-4777-8777-777777777777")
+                    .put("title", "Session finalization regression")
+                    .put("note", JSONObject.NULL)
+                    .put("state", "active")
+                    .put("start_date", "2026-09-24")
+                    .put("end_date", JSONObject.NULL)
+                    .put("created_at", "2026-09-24T08:00:00Z")
+                    .put("updated_at", "2026-09-24T08:00:00Z")
+                    .put("source_format", "trainlog-program")
+                    .put("source_version", 1)
+                    .put("source_payload_sha256", "a".repeat(64))
+                    .put(
+                        "sessions",
+                        JSONArray().put(
+                            JSONObject()
+                                .put("program_session_id", programSessionId)
+                                .put("title", "Workout")
+                                .put("session_type", "training")
+                                .put("planned_for", "2026-09-24")
+                                .put("note", JSONObject.NULL)
+                                .put(
+                                    "occurrences",
+                                    JSONArray()
+                                        .put(
+                                            occurrence(
+                                                "pge_88888888-8888-4888-8888-888888888888",
+                                                warmupId,
+                                                null,
+                                                null,
+                                                480,
+                                                null,
+                                                0,
+                                            ),
+                                        )
+                                        .put(
+                                            occurrence(
+                                                "pge_99999999-9999-4999-8999-999999999999",
+                                                rowId,
+                                                3,
+                                                10,
+                                                null,
+                                                39.0,
+                                                90,
+                                            ),
+                                        )
+                                        .put(
+                                            occurrence(
+                                                "pge_aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa",
+                                                pressId,
+                                                3,
+                                                10,
+                                                null,
+                                                32.0,
+                                                90,
+                                            ),
+                                        )
+                                        .put(
+                                            occurrence(
+                                                "pge_bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb",
+                                                curlId,
+                                                2,
+                                                10,
+                                                null,
+                                                23.0,
+                                                60,
+                                            ),
+                                        ),
+                                ),
+                        ),
+                    )
+            val programs =
+                JSONObject()
+                    .put("format", "trainlog-programs")
+                    .put("version", 1)
+                    .put("generated_at", "2026-09-24T08:01:00Z")
+                    .put("programs", JSONArray().put(program))
+                    .put("deletions", JSONArray())
+                    .toString()
+            assertEquals(
+                ProgramsImportResult.Applied(1, 0, 0),
+                repository.applyProgramsV1Json(programs),
+            )
+            assertEquals(
+                StartProgramSessionResult.Started,
+                repository.startSyncedProgramSession(programId, programSessionId),
+            )
+
+            val opened = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            val sessionId = checkNotNull(opened.draft.sessionId)
+            val sessionStart = OffsetDateTime.parse(checkNotNull(opened.draft.startedAt))
+            val warmup = opened.draft.exercises[0]
+            val row = opened.draft.exercises[1]
+            val press = opened.draft.exercises[2]
+            val curl = opened.draft.exercises[3]
+            val performed =
+                opened.draft.copy(
+                    exercises =
+                        listOf(
+                            warmup,
+                            row.copy(
+                                sets = List(3) { SessionSetDraft(reps = 10, weightKg = 39.0) },
+                            ),
+                            press.copy(
+                                sets = List(3) { SessionSetDraft(reps = 10, weightKg = 32.0) },
+                            ),
+                            curl.copy(
+                                sets = List(3) { SessionSetDraft(reps = 10, weightKg = 23.0) },
+                            ),
+                        ),
+                )
+            assertEquals(ActiveDraftMutationResult.Saved, repository.saveActiveSessionDraft(performed))
+
+            val warmupStart = sessionStart.plusSeconds(10)
+            val warmupEnd = warmupStart.plusSeconds(433)
+            assertTrue(
+                repository.startActiveSessionExercise(warmup.entryId, warmupStart.toString()) is
+                    TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+            assertTrue(
+                repository.finishActiveSessionExercise(warmup.entryId, warmupEnd.toString()) is
+                    TrainlogRepository.SessionExerciseTimingResult.Finished,
+            )
+            val materialized = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(433, materialized.draft.exercises[0].continuousDurationSeconds)
+            /* Recreate the exact v49 persisted state: its timeline was closed,
+             * but the target-only continuous occurrence had no performed row. */
+            context.openOrCreateDatabase(name, Context.MODE_PRIVATE, null).use { db ->
+                db.execSQL(
+                    "DELETE FROM draft_continuous_activity WHERE draft_exercise_row_id=(" +
+                        "SELECT id FROM draft_session_exercises WHERE draft_id=1 AND entry_id=?)",
+                    arrayOf(warmup.entryId),
+                )
+            }
+            val legacy = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(0, legacy.draft.exercises[0].continuousDurationSeconds)
+
+            listOf(row, press, curl).forEachIndexed { index, exercise ->
+                val startedAt = warmupEnd.plusSeconds(30L + index * 90L)
+                val endedAt = startedAt.plusSeconds(60)
+                assertTrue(
+                    repository.startActiveSessionExercise(exercise.entryId, startedAt.toString()) is
+                        TrainlogRepository.SessionExerciseTimingResult.Started,
+                )
+                assertTrue(
+                    repository.finishActiveSessionExercise(exercise.entryId, endedAt.toString()) is
+                        TrainlogRepository.SessionExerciseTimingResult.Finished,
+                )
+            }
+            assertTrue(
+                repository.saveDraftExerciseFeedback(
+                    curl.entryId,
+                    "Valid effort feedback",
+                    warmupEnd.plusSeconds(400).toString(),
+                ) is SaveFeedbackResult.Saved,
+            )
+
+            val measurement =
+                ParsedHeartRateMeasurement(
+                    bpm = 107,
+                    sensorContactDetected = true,
+                    energyExpended = null,
+                    rrIntervals1024 = listOf(620),
+                )
+            val finalizationAt = warmupEnd.plusSeconds(500)
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR",
+                    finalizationAt.minusSeconds(1).toString(),
+                    measurement,
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            val lateSampleAt = finalizationAt.plusSeconds(10)
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR",
+                    lateSampleAt.toString(),
+                    measurement.copy(bpm = 99),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+
+            val finalized = repository.finalizeActiveSessionDraft(finalizationAt.toString())
+            assertEquals(
+                sessionId,
+                (finalized as FinalizeActiveDraftResult.Saved).sessionId,
+            )
+            val detail = checkNotNull(repository.getSessionDetail(sessionId))
+            assertEquals(finalizationAt.toString(), detail.summary.endedAt)
+            assertEquals(4, detail.exercises.size)
+            assertEquals(433, detail.exercises[0].continuousDurationSeconds)
+            assertEquals(2, detail.exercises[3].plan?.sets)
+            assertEquals(3, detail.exercises[3].sets.size)
+            assertTrue(detail.exercises[3].sets.all { it.reps == 10 && it.weightKg == 23.0 })
+            assertEquals(1, detail.exercises[3].feedback.size)
+
+            val timeline = JSONObject(repository.buildSessionTimelineV1Json())
+            val timelineSession = timeline.getJSONArray("sessions").getJSONObject(0)
+            assertEquals(finalizationAt.toString(), timelineSession.getString("ended_at"))
+            assertEquals(4, timelineSession.getJSONArray("exercises").length())
+
+            val heart = JSONObject(repository.buildHeartRateV1Json())
+            val capture = heart.getJSONArray("captures").getJSONObject(0)
+            assertEquals(finalizationAt.toString(), capture.getString("ended_at"))
+            assertEquals(1, capture.getJSONArray("samples").length())
+            assertEquals(1, capture.getJSONArray("samples").getJSONObject(0)
+                .getJSONArray("rr_intervals_1024").length())
+            assertNull(repository.activeHeartRateCapture())
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/SessionTimelineSyncGenerationTest.kt

@@ -0,0 +1,209 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionSetDraft
+import com.labfytools.trainlog.model.TrackingMode
+import java.nio.file.Files
+import java.time.OffsetDateTime
+import java.util.UUID
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SessionTimelineSyncGenerationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun timelineAndHeartRateArriveTogetherAndStopPublishingAfterAck() {
+        val sourceName = "timeline-sync-" + UUID.randomUUID() + ".db"
+        val root = Files.createTempDirectory("trainlog-timeline-sync-").toFile()
+        val source = TrainlogRepository(context, sourceName)
+        try {
+            fun exercise(label: String) =
+                (source.createExercise(
+                    NewExerciseProfile(label, RecordingMode.SETS, TrackingMode.REPS, 0),
+                ) as CreateExerciseResult.Created).exercise
+            val a = SessionExerciseDraft(
+                exercise = exercise("Sync timeline A"),
+                sets = listOf(SessionSetDraft(reps = 8)),
+            )
+            val b = SessionExerciseDraft(
+                exercise = exercise("Sync timeline B"),
+                sets = listOf(SessionSetDraft(reps = 9)),
+            )
+            assertEquals(ActiveDraftMutationResult.Saved, source.startActiveSessionDraft())
+            val opened = source.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                source.saveActiveSessionDraft(opened.draft.copy(exercises = listOf(a, b))),
+            )
+            assertTrue(
+                source.startActiveSessionExercise(a.entryId) is
+                    TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+            val base = ParsedHeartRateMeasurement(96, null, null, listOf(640))
+            assertTrue(
+                source.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR",
+                    OffsetDateTime.now().toString(),
+                    base,
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            assertTrue(
+                source.finishActiveSessionExercise(a.entryId) is
+                    TrainlogRepository.SessionExerciseTimingResult.Finished,
+            )
+            assertTrue(
+                source.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR",
+                    OffsetDateTime.now().toString(),
+                    base.copy(bpm = 84),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            assertTrue(
+                source.startActiveSessionExercise(b.entryId) is
+                    TrainlogRepository.SessionExerciseTimingResult.Started,
+            )
+            assertTrue(
+                source.recordLiveHeartRateForActiveSession(
+                    "Synthetic HR",
+                    OffsetDateTime.now().toString(),
+                    base.copy(bpm = 105),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            assertTrue(
+                source.finishActiveSessionExercise(b.entryId) is
+                    TrainlogRepository.SessionExerciseTimingResult.Finished,
+            )
+            assertTrue(source.finalizeActiveSessionDraft() is FinalizeActiveDraftResult.Saved)
+
+            val repositoryRoot =
+                generateSequence(java.io.File(checkNotNull(System.getProperty("user.dir")))) {
+                    it.parentFile
+                }.first { java.io.File(it, "tools/sync_generation_exchange.py").isFile }
+            fun run(vararg command: String): String {
+                val process =
+                    ProcessBuilder(*command)
+                        .directory(repositoryRoot)
+                        .redirectErrorStream(true)
+                        .start()
+                val output = process.inputStream.bufferedReader().readText()
+                assertEquals(
+                    "command failed: " + command.joinToString(" ") + "\n" + output,
+                    0,
+                    process.waitFor(),
+                )
+                return output
+            }
+
+            val desktopDb = java.io.File(root, "desktop.sqlite")
+            run(
+                java.io.File(repositoryRoot, "build/tui/sync-generation-fixture").absolutePath,
+                desktopDb.absolutePath,
+            )
+            val desktopPeer =
+                Regex("PEER_ID=(peer_[^\\s]+)")
+                    .find(
+                        run(
+                            "python3",
+                            java.io.File(
+                                repositoryRoot,
+                                "tools/sync_generation_exchange.py",
+                            ).absolutePath,
+                            "peer-id",
+                            "--database",
+                            desktopDb.absolutePath,
+                        ),
+                    )!!
+                    .groupValues[1]
+
+            val service = SyncGenerationService(source)
+            val captured = service.capture(root, desktopPeer)
+            val timelineJson =
+                JSONObject(
+                    java.io.File(
+                        captured.stagingDirectory,
+                        "session-timeline-v1.json",
+                    ).readText(),
+                )
+            assertEquals(1, timelineJson.getJSONArray("sessions").length())
+            assertEquals(
+                2,
+                timelineJson
+                    .getJSONArray("sessions")
+                    .getJSONObject(0)
+                    .getJSONArray("exercises")
+                    .length(),
+            )
+            val heartJson =
+                JSONObject(
+                    java.io.File(captured.stagingDirectory, "heart-rate-v1.json").readText(),
+                )
+            assertEquals(
+                3,
+                heartJson
+                    .getJSONArray("captures")
+                    .getJSONObject(0)
+                    .getJSONArray("samples")
+                    .length(),
+            )
+
+            val published = service.publish(captured, java.io.File(root, "objects"))
+            val ackFile = java.io.File(root, "ack.json")
+            run(
+                "python3",
+                java.io.File(repositoryRoot, "tools/sync_generation_exchange.py").absolutePath,
+                "consume-desktop",
+                published.absolutePath,
+                "--database",
+                desktopDb.absolutePath,
+                "--ack-output",
+                ackFile.absolutePath,
+            )
+            val ack = JSONObject(ackFile.readText())
+            assertEquals(
+                "desktop ACK diagnostic: " + ack.getString("diagnostic"),
+                "consumed",
+                ack.getString("result"),
+            )
+            assertEquals("acknowledged", service.acceptAcknowledgement(ackFile.readBytes()))
+
+            assertEquals(
+                "2|3|3",
+                run(
+                    "sqlite3",
+                    desktopDb.absolutePath,
+                    "SELECT (SELECT count(*) FROM session_exercise_timeline) || '|' || " +
+                        "(SELECT count(*) FROM heart_rate_samples) || '|' || " +
+                        "(SELECT count(*) FROM heart_rate_rr_intervals);",
+                ).trim(),
+            )
+            assertEquals(
+                0,
+                JSONObject(source.buildSessionTimelineV1Json())
+                    .getJSONArray("sessions")
+                    .length(),
+            )
+            assertEquals(
+                0,
+                JSONObject(source.buildHeartRateV1Json())
+                    .getJSONArray("captures")
+                    .length(),
+            )
+        } finally {
+            source.close()
+            context.deleteDatabase(sourceName)
+            root.deleteRecursively()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/SleepDiaryRepositoryTest.kt

@@ -0,0 +1,434 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import android.database.sqlite.SQLiteException
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.SleepDiaryDraft
+import com.labfytools.trainlog.model.SleepDiaryEvent
+import com.labfytools.trainlog.model.SleepEventType
+import com.labfytools.trainlog.model.SleepQuality
+import com.labfytools.trainlog.model.SleepPublicationStatus
+import com.labfytools.trainlog.model.MedicationIntake
+import com.labfytools.trainlog.model.SleepMedication
+import java.util.UUID
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertThrows
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SleepDiaryRepositoryTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test fun createEditConflictDeleteAndReopen() {
+        val name = "sleep-${UUID.randomUUID()}.db"
+        var repository = TrainlogRepository(context, name)
+        try {
+            val catalogTime = "2026-10-24T18:00:00+02:00"
+            val medicationResult = repository.saveSleepMedication(SleepMedication("", "", catalogTime,
+                catalogTime, "Synthetic medication", 5.0, "mg", "tablet", "", true)) as
+                TrainlogRepository.SaveSleepDiaryResult.Saved
+            val initial = SleepDiaryDraft(nightStartDate = "2026-10-24", nightEndDate = "2026-10-25",
+                createdAt = "2026-10-24T23:30:00+02:00", updatedAt = "2026-10-24T23:30:00+02:00",
+                sleepQuality = SleepQuality.B, wakeQuality = null, dayForm = null,
+                treatmentAndNotes = "Synthetic fixture", events = listOf(
+                    SleepDiaryEvent("", SleepEventType.SLEEP, "2026-10-24T23:30:00+02:00", "2026-10-25T06:30:00+01:00"),
+                    SleepDiaryEvent("", SleepEventType.DAYTIME_SLEEPINESS, "2026-10-25T14:00:00+01:00", null)),
+                intakes = listOf(MedicationIntake("", medicationResult.entryId,
+                    "Synthetic medication", "2026-10-25T05:15:00+01:00", 10.0, "mg", "", catalogTime)))
+            val created = repository.saveSleepDiary(initial) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            val loaded = repository.listSleepDiary().single()
+            assertEquals(SleepPublicationStatus.DRAFT, loaded.publicationStatus)
+            assertEquals(0, org.json.JSONObject(repository.buildSleepDiaryV1Json())
+                .getJSONArray("entries").length())
+            assertTrue(repository.validateSleepDiary(loaded.entryId, loaded.revisionId,
+                "2026-10-25T17:30:00+01:00") is TrainlogRepository.SaveSleepDiaryResult.Saved)
+            assertEquals(SleepPublicationStatus.READY,
+                repository.listSleepDiary().single().publicationStatus)
+            assertEquals(1, org.json.JSONObject(repository.buildSleepDiaryV1Json())
+                .getJSONArray("entries").length())
+            assertEquals(2, loaded.events.size)
+            assertEquals(10.0, loaded.intakes.single().doseValue!!, 0.0)
+            val medication = repository.listSleepMedications().single()
+            assertEquals(5.0, medication.defaultDoseValue!!, 0.0)
+            assertTrue(repository.saveSleepMedication(medication.copy(name = "Renamed medication",
+                updatedAt = "2026-10-25T12:00:00+01:00")) is
+                TrainlogRepository.SaveSleepDiaryResult.Saved)
+            assertEquals("Synthetic medication", loaded.intakes.single().medicationName)
+            val edited = repository.saveSleepDiary(initial.copy(entryId = created.entryId,
+                expectedRevision = created.revisionId, updatedAt = "2026-10-25T18:00:00+01:00",
+                wakeQuality = SleepQuality.MOY, dayForm = SleepQuality.TB))
+            assertTrue(edited is TrainlogRepository.SaveSleepDiaryResult.Saved)
+            assertTrue(repository.saveSleepDiary(initial.copy(entryId = created.entryId,
+                expectedRevision = created.revisionId)) is TrainlogRepository.SaveSleepDiaryResult.Conflict)
+            repository.close(); repository = TrainlogRepository(context, name)
+            val reopened = repository.listSleepDiary().single()
+            assertEquals(SleepQuality.MOY, reopened.wakeQuality)
+            assertEquals(SleepPublicationStatus.DRAFT, reopened.publicationStatus)
+            assertTrue(repository.deleteSleepDiary(reopened.entryId, reopened.revisionId,
+                "2026-10-26T12:00:00+01:00") is TrainlogRepository.SaveSleepDiaryResult.Saved)
+            assertTrue(repository.listSleepDiary().isEmpty())
+        } finally { repository.close(); context.deleteDatabase(name) }
+    }
+
+    @Test
+    fun persistedSleepRevisionPayloadIsAppendOnly() {
+        val name = "sleep-immutable-${UUID.randomUUID()}.db"
+        val repository = TrainlogRepository(context, name)
+        val saved = try {
+            repository.saveSleepDiary(
+                SleepDiaryDraft(
+                    nightStartDate = "2026-10-24",
+                    nightEndDate = "2026-10-25",
+                    createdAt = "2026-10-24T22:00:00+02:00",
+                    updatedAt = "2026-10-25T07:00:00+01:00",
+                    sleepQuality = SleepQuality.B,
+                    wakeQuality = null,
+                    dayForm = null,
+                    treatmentAndNotes = "",
+                    events = emptyList(),
+                ),
+            ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+        } finally {
+            repository.close()
+        }
+        val raw = SQLiteDatabase.openDatabase(
+            context.getDatabasePath(name).path,
+            null,
+            SQLiteDatabase.OPEN_READWRITE,
+        )
+        try {
+            assertEquals(33, raw.version)
+            assertThrows(SQLiteException::class.java) {
+                raw.execSQL(
+                    "UPDATE sleep_diary_revisions SET sleep_quality='TB' WHERE revision_id=?",
+                    arrayOf(saved.revisionId),
+                )
+            }
+            assertThrows(SQLiteException::class.java) {
+                raw.execSQL(
+                    "DELETE FROM sleep_diary_revisions WHERE revision_id=?",
+                    arrayOf(saved.revisionId),
+                )
+            }
+            assertEquals(
+                "B",
+                raw.rawQuery(
+                    "SELECT sleep_quality FROM sleep_diary_revisions WHERE revision_id=?",
+                    arrayOf(saved.revisionId),
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    cursor.getString(0)
+                },
+            )
+        } finally {
+            raw.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun successiveSleepEditsKeepUniqueIdentitiesAndExactParentage() {
+        val name = "sleep-revision-chain-${UUID.randomUUID()}.db"
+        val repository = TrainlogRepository(context, name)
+        val identities = mutableListOf<String>()
+        val expectedParents = mutableMapOf<String, String?>()
+        val expectedNotes = mutableMapOf<String, String>()
+        try {
+            val created = repository.saveSleepDiary(
+                SleepDiaryDraft(
+                    nightStartDate = "2026-10-24",
+                    nightEndDate = "2026-10-25",
+                    createdAt = "2026-10-24T22:00:00+02:00",
+                    updatedAt = "2026-10-25T07:00:00+01:00",
+                    sleepQuality = null,
+                    wakeQuality = null,
+                    dayForm = null,
+                    treatmentAndNotes = "revision-root",
+                    events = emptyList(),
+                ),
+            ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            identities += created.revisionId
+            expectedParents[created.revisionId] = null
+            expectedNotes[created.revisionId] = "revision-root"
+
+            repeat(64) { index ->
+                val current = repository.listSleepDiary().single()
+                val note = "revision-$index"
+                val hour = 8 + index / 60
+                val minute = index % 60
+                val saved = repository.saveSleepDiary(
+                    SleepDiaryDraft(
+                        entryId = current.entryId,
+                        expectedRevision = current.revisionId,
+                        nightStartDate = current.nightStartDate,
+                        nightEndDate = current.nightEndDate,
+                        createdAt = current.createdAt,
+                        updatedAt = "2026-10-25T%02d:%02d:00+01:00".format(hour, minute),
+                        sleepQuality = current.sleepQuality,
+                        wakeQuality = current.wakeQuality,
+                        dayForm = current.dayForm,
+                        treatmentAndNotes = note,
+                        events = current.events,
+                        intakes = current.intakes,
+                    ),
+                ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+                expectedParents[saved.revisionId] = current.revisionId
+                expectedNotes[saved.revisionId] = note
+                identities += saved.revisionId
+            }
+        } finally {
+            repository.close()
+        }
+
+        assertEquals(65, identities.toSet().size)
+        val raw = SQLiteDatabase.openDatabase(
+            context.getDatabasePath(name).path,
+            null,
+            SQLiteDatabase.OPEN_READONLY,
+        )
+        try {
+            identities.forEach { revisionId ->
+                raw.rawQuery(
+                    "SELECT parent_revision_id,treatment_and_notes " +
+                        "FROM sleep_diary_revisions WHERE revision_id=?",
+                    arrayOf(revisionId),
+                ).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    val parent = if (cursor.isNull(0)) null else cursor.getString(0)
+                    assertEquals(expectedParents[revisionId], parent)
+                    assertEquals(expectedNotes[revisionId], cursor.getString(1))
+                }
+            }
+        } finally {
+            raw.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun ancestryAllowsMultiHopRemoteAdvance() {
+        val sourceName = "sleep-stale-source-${UUID.randomUUID()}.db"
+        val destinationName = "sleep-stale-destination-${UUID.randomUUID()}.db"
+        val source = TrainlogRepository(context, sourceName)
+        val destination = TrainlogRepository(context, destinationName)
+        try {
+            val createdAt = "2026-09-20T20:00:00+02:00"
+            source.saveSleepMedication(
+                SleepMedication("", "", createdAt, createdAt, "Medication", 5.0, "mg", "", "", true),
+            )
+            val firstSaved = source.saveSleepDiary(
+                SleepDiaryDraft(
+                    nightStartDate = "2026-09-20",
+                    nightEndDate = "2026-09-21",
+                    createdAt = createdAt,
+                    updatedAt = createdAt,
+                    sleepQuality = SleepQuality.B,
+                    wakeQuality = null,
+                    dayForm = null,
+                    treatmentAndNotes = "",
+                    events = listOf(
+                        SleepDiaryEvent(
+                            "",
+                            SleepEventType.SLEEP,
+                            "2026-09-20T23:00:00+02:00",
+                            "2026-09-21T07:00:00+02:00",
+                        ),
+                    ),
+                ),
+            ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            assertTrue(
+                source.validateSleepDiary(
+                    firstSaved.entryId,
+                    firstSaved.revisionId,
+                    "2026-09-21T08:00:00+02:00",
+                ) is TrainlogRepository.SaveSleepDiaryResult.Saved,
+            )
+            val firstSnapshot = source.buildSleepDiaryV1Json()
+            assertEquals(
+                TrainlogRepository.SleepDiaryImportResult.Applied(1, 0),
+                destination.applySleepDiaryV1Json(firstSnapshot),
+            )
+
+            val medication = source.listSleepMedications().single()
+            source.saveSleepMedication(
+                medication.copy(
+                    name = "Medication revised",
+                    updatedAt = "2026-09-21T08:05:00+02:00",
+                ),
+            )
+            val current = source.listSleepDiary().single()
+            val secondSaved = source.saveSleepDiary(
+                SleepDiaryDraft(
+                    entryId = current.entryId,
+                    expectedRevision = current.revisionId,
+                    nightStartDate = current.nightStartDate,
+                    nightEndDate = current.nightEndDate,
+                    createdAt = current.createdAt,
+                    updatedAt = "2026-09-21T08:10:00+02:00",
+                    sleepQuality = current.sleepQuality,
+                    wakeQuality = SleepQuality.MOY,
+                    dayForm = current.dayForm,
+                    treatmentAndNotes = current.treatmentAndNotes,
+                    events = current.events,
+                    intakes = current.intakes,
+                ),
+            ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            assertTrue(
+                source.validateSleepDiary(
+                    secondSaved.entryId,
+                    secondSaved.revisionId,
+                    "2026-09-21T08:15:00+02:00",
+                ) is TrainlogRepository.SaveSleepDiaryResult.Saved,
+            )
+            val afterSecond = source.listSleepDiary().single()
+            val thirdSaved = source.saveSleepDiary(
+                SleepDiaryDraft(
+                    entryId = afterSecond.entryId,
+                    expectedRevision = secondSaved.revisionId,
+                    nightStartDate = afterSecond.nightStartDate,
+                    nightEndDate = afterSecond.nightEndDate,
+                    createdAt = afterSecond.createdAt,
+                    updatedAt = "2026-09-21T08:20:00+02:00",
+                    sleepQuality = afterSecond.sleepQuality,
+                    wakeQuality = afterSecond.wakeQuality,
+                    dayForm = SleepQuality.TB,
+                    treatmentAndNotes = afterSecond.treatmentAndNotes,
+                    events = afterSecond.events,
+                    intakes = afterSecond.intakes,
+                ),
+            ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            assertTrue(
+                source.validateSleepDiary(
+                    thirdSaved.entryId,
+                    thirdSaved.revisionId,
+                    "2026-09-21T08:25:00+02:00",
+                ) is TrainlogRepository.SaveSleepDiaryResult.Saved,
+            )
+            val latestSnapshot = source.buildSleepDiaryV1Json()
+            val ancestry =
+                org.json.JSONObject(latestSnapshot)
+                    .getJSONArray("entries")
+                    .getJSONObject(0)
+                    .getJSONArray("ancestry")
+            assertTrue((0 until ancestry.length()).any { ancestry.getString(it) == firstSaved.revisionId })
+            assertEquals(
+                TrainlogRepository.SleepDiaryImportResult.Applied(1, 0),
+                destination.applySleepDiaryV1Json(latestSnapshot),
+            )
+
+            assertEquals(thirdSaved.revisionId, destination.listSleepDiary().single().revisionId)
+            assertEquals(SleepQuality.MOY, destination.listSleepDiary().single().wakeQuality)
+            assertEquals(SleepQuality.TB, destination.listSleepDiary().single().dayForm)
+            assertEquals("Medication revised", destination.listSleepMedications().single().name)
+
+            val reusedAncestor = org.json.JSONObject(firstSnapshot)
+            reusedAncestor.getJSONArray("entries").getJSONObject(0).put("sleep_quality", "M")
+            assertEquals(
+                TrainlogRepository.SleepDiaryImportResult.Rejected(
+                    "sleep diary revision identity reused with different content",
+                ),
+                destination.applySleepDiaryV1Json(reusedAncestor.toString()),
+            )
+        } finally {
+            source.close()
+            destination.close()
+            context.deleteDatabase(sourceName)
+            context.deleteDatabase(destinationName)
+        }
+    }
+
+    @Test
+    fun currentSnapshotSeedsFreshPeerFromNonRootRevisions() {
+        val sourceName = "sleep-source-${UUID.randomUUID()}.db"
+        val destinationName = "sleep-destination-${UUID.randomUUID()}.db"
+        val source = TrainlogRepository(context, sourceName)
+        val destination = TrainlogRepository(context, destinationName)
+        try {
+            val time = "2026-09-21T20:00:00+02:00"
+            val createdMedication =
+                source.saveSleepMedication(
+                    SleepMedication("", "", time, time, "Medication", 5.0, "mg", "", "", true),
+                ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            val medication = source.listSleepMedications().single()
+            source.saveSleepMedication(
+                medication.copy(name = "Medication revised", updatedAt = "2026-09-21T20:05:00+02:00"),
+            )
+            val createdEntry =
+                source.saveSleepDiary(
+                    SleepDiaryDraft(
+                        nightStartDate = "2026-09-20",
+                        nightEndDate = "2026-09-21",
+                        createdAt = time,
+                        updatedAt = time,
+                        sleepQuality = null,
+                        wakeQuality = null,
+                        dayForm = null,
+                        treatmentAndNotes = "",
+                        events = listOf(
+                            SleepDiaryEvent(
+                                "",
+                                SleepEventType.SLEEP,
+                                "2026-09-20T23:00:00+02:00",
+                                "2026-09-21T07:00:00+02:00",
+                            ),
+                        ),
+                        intakes = listOf(
+                            MedicationIntake(
+                                "",
+                                createdMedication.entryId,
+                                "Medication",
+                                "2026-09-20T22:00:00+02:00",
+                                5.0,
+                                "mg",
+                                "",
+                                time,
+                            ),
+                        ),
+                    ),
+                ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            val current = source.listSleepDiary().single()
+            val edited =
+                source.saveSleepDiary(
+                    SleepDiaryDraft(
+                        entryId = current.entryId,
+                        expectedRevision = createdEntry.revisionId,
+                        nightStartDate = current.nightStartDate,
+                        nightEndDate = current.nightEndDate,
+                        createdAt = current.createdAt,
+                        updatedAt = "2026-09-21T20:10:00+02:00",
+                        sleepQuality = current.sleepQuality,
+                        wakeQuality = current.wakeQuality,
+                        dayForm = SleepQuality.B,
+                        treatmentAndNotes = current.treatmentAndNotes,
+                        events = current.events,
+                        intakes = current.intakes,
+                    ),
+                ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            assertTrue(
+                source.validateSleepDiary(
+                    current.entryId,
+                    edited.revisionId,
+                    "2026-09-21T20:15:00+02:00",
+                ) is TrainlogRepository.SaveSleepDiaryResult.Saved,
+            )
+
+            assertEquals(
+                TrainlogRepository.SleepDiaryImportResult.Applied(1, 0),
+                destination.applySleepDiaryV1Json(source.buildSleepDiaryV1Json()),
+            )
+            assertEquals("Medication revised", destination.listSleepMedications().single().name)
+            assertEquals(SleepQuality.B, destination.listSleepDiary().single().dayForm)
+        } finally {
+            source.close()
+            destination.close()
+            context.deleteDatabase(sourceName)
+            context.deleteDatabase(destinationName)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/SleepQuickCaptureTest.kt

@@ -0,0 +1,287 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.SleepEventType
+import com.labfytools.trainlog.model.SleepMedication
+import java.util.UUID
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SleepQuickCaptureTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun pendingMedicationSurvivesReopenAndBedTimeKeepsEntryIdentity() {
+        val name = "sleep-reopen-" + UUID.randomUUID()
+        var repository = TrainlogRepository(context, name)
+        try {
+            val medication =
+                repository.saveSleepMedication(
+                    SleepMedication(
+                        medicationId = "",
+                        revisionId = "",
+                        createdAt = "2026-09-23T20:00:00+02:00",
+                        updatedAt = "2026-09-23T20:00:00+02:00",
+                        name = "Test medication",
+                        defaultDoseValue = 5.0,
+                        defaultDoseUnit = "mg",
+                        form = "",
+                        note = "",
+                        active = true,
+                    ),
+                ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            val pending =
+                repository.quickSleepMedication(
+                    medication.entryId,
+                    "2026-09-23T22:20:00+02:00",
+                    quantity = 2,
+                ) as TrainlogRepository.SleepQuickActionResult.Applied
+
+            repository.close()
+            repository = TrainlogRepository(context, name)
+
+            val bed =
+                repository.quickSleepBedTime("2026-09-23T22:30:00+02:00")
+                    as TrainlogRepository.SleepQuickActionResult.Applied
+            assertEquals(pending.receipt.entryId, bed.receipt.entryId)
+            assertEquals(2, repository.listSleepDiary().single().intakes.single().quantity)
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun oneTapNightRecordsMedicationWakesAndSleepHeartRate() {
+        val name = "sleep-quick-" + UUID.randomUUID()
+        val repository = TrainlogRepository(context, name)
+        try {
+            val medicationCreated =
+                repository.saveSleepMedication(
+                    SleepMedication(
+                        medicationId = "",
+                        revisionId = "",
+                        createdAt = "2026-09-23T20:00:00+02:00",
+                        updatedAt = "2026-09-23T20:00:00+02:00",
+                        name = "Test medication",
+                        defaultDoseValue = 5.0,
+                        defaultDoseUnit = "mg",
+                        form = "",
+                        note = "",
+                        active = true,
+                    ),
+                ) as TrainlogRepository.SaveSleepDiaryResult.Saved
+            val medication =
+                repository.listSleepMedications(false).single {
+                    it.medicationId == medicationCreated.entryId
+                }
+
+            val preBed = repository.quickSleepMedication(
+                medication.medicationId,
+                "2026-09-23T22:20:00+02:00",
+                quantity = 2,
+            ) as TrainlogRepository.SleepQuickActionResult.Applied
+            assertNull(repository.activeHeartRateCapture())
+            val pending = repository.listSleepDiary().single()
+            assertTrue(pending.events.none { it.type == SleepEventType.BED_TIME })
+            assertEquals(2, pending.intakes.single().quantity)
+            val preBedExport = JSONObject(repository.buildSleepDiaryV1Json())
+            val exportedPending = preBedExport.getJSONArray("entries").getJSONObject(0)
+            assertEquals(preBed.receipt.entryId, exportedPending.getString("entry_id"))
+            assertEquals(preBed.receipt.appliedRevisionId, exportedPending.getString("revision_id"))
+            assertEquals(0, exportedPending.getJSONArray("events").length())
+            assertEquals(1, exportedPending.getJSONArray("intakes").length())
+
+            val bed =
+                repository.quickSleepBedTime("2026-09-23T22:30:00+02:00")
+                    as TrainlogRepository.SleepQuickActionResult.Applied
+            assertEquals(preBed.receipt.entryId, bed.receipt.entryId)
+            assertEquals("2026-09-23", repository.listSleepDiary().single().nightStartDate)
+
+            val measurement =
+                ParsedHeartRateMeasurement(
+                    bpm = 62,
+                    sensorContactDetected = null,
+                    energyExpended = null,
+                    rrIntervals1024 = listOf(1000),
+                )
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSleep(
+                    "CYCPLUS H2",
+                    "2026-09-23T22:30:01+02:00",
+                    measurement,
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+            val captureId = checkNotNull(repository.activeHeartRateCapture()).captureId
+
+            assertTrue(
+                repository.quickSleepMedication(
+                    medication.medicationId,
+                    "2026-09-23T22:35:00+02:00",
+                ) is TrainlogRepository.SleepQuickActionResult.Applied,
+            )
+            assertTrue(
+                repository.quickSleepWake("2026-09-24T02:17:00+02:00")
+                    is TrainlogRepository.SleepQuickActionResult.Applied,
+            )
+            assertTrue(
+                repository.quickSleepWake("2026-09-24T04:42:00+02:00")
+                    is TrainlogRepository.SleepQuickActionResult.Applied,
+            )
+
+            val beforeGetUp = repository.listSleepDiary().single()
+            assertEquals(bed.receipt.entryId, beforeGetUp.entryId)
+            assertEquals(
+                2,
+                beforeGetUp.events.count { it.type == SleepEventType.LONG_AWAKE },
+            )
+            assertEquals(
+                listOf(
+                    "2026-09-24T02:17:00+02:00" to "2026-09-24T02:47:00+02:00",
+                    "2026-09-24T04:42:00+02:00" to "2026-09-24T05:12:00+02:00",
+                ),
+                beforeGetUp.events
+                    .filter { it.type == SleepEventType.LONG_AWAKE }
+                    .map { it.startAt to it.endAt },
+            )
+            assertTrue(beforeGetUp.events.none { it.type == SleepEventType.NIGHT_GET_UP })
+            assertEquals(2, beforeGetUp.intakes.size)
+            assertEquals(2, beforeGetUp.intakes.first().quantity)
+            assertEquals(5.0, checkNotNull(beforeGetUp.intakes.first().doseValue), 0.0)
+
+            assertTrue(
+                repository.recordLiveHeartRateForActiveSleep(
+                    "CYCPLUS H2",
+                    "2026-09-24T04:43:00+02:00",
+                    measurement.copy(bpm = 65),
+                ) is TrainlogRepository.HeartRateMutationResult.Applied,
+            )
+
+            assertTrue(
+                repository.quickSleepFinalGetUp("2026-09-24T06:31:00+02:00")
+                    is TrainlogRepository.SleepQuickActionResult.Applied,
+            )
+            assertNull(repository.activeHeartRateCapture())
+            assertNull(
+                repository.recordLiveHeartRateForActiveSleep(
+                    "CYCPLUS H2",
+                    "2026-09-24T06:32:00+02:00",
+                    measurement.copy(bpm = 70),
+                ),
+            )
+            val finalEntry = repository.listSleepDiary().single()
+            assertEquals(
+                1,
+                finalEntry.events.count { it.type == SleepEventType.FINAL_GET_UP },
+            )
+
+            val exported = JSONObject(repository.buildHeartRateV1Json())
+            val capture = exported.getJSONArray("captures").getJSONObject(0)
+            assertEquals(captureId, capture.getString("capture_id"))
+            assertEquals("sleep", capture.getString("context_kind"))
+            assertEquals(finalEntry.entryId, capture.getString("context_id"))
+            assertEquals(62, capture.getJSONArray("samples").getJSONObject(0).getInt("bpm"))
+            assertEquals("2026-09-23T22:30:00+02:00", capture.getString("started_at"))
+            assertEquals("2026-09-24T06:31:00+02:00", capture.getString("ended_at"))
+            assertEquals(2, capture.getJSONArray("samples").length())
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun undoIsGuardedByTheExactAppliedRevision() {
+        val name = "sleep-undo-" + UUID.randomUUID()
+        val repository = TrainlogRepository(context, name)
+        try {
+            repository.quickSleepBedTime("2026-09-23T22:30:00+02:00")
+            val firstWake =
+                repository.quickSleepWake("2026-09-24T02:00:00+02:00")
+                    as TrainlogRepository.SleepQuickActionResult.Applied
+            val secondWake =
+                repository.quickSleepWake("2026-09-24T03:00:00+02:00")
+                    as TrainlogRepository.SleepQuickActionResult.Applied
+
+            assertTrue(
+                repository.undoSleepQuickAction(firstWake.receipt)
+                    is TrainlogRepository.SleepQuickActionResult.Conflict,
+            )
+            assertTrue(
+                repository.undoSleepQuickAction(
+                    secondWake.receipt,
+                    "2026-09-24T03:00:05+02:00",
+                ) is TrainlogRepository.SleepQuickActionResult.Applied,
+            )
+
+            val night = repository.listSleepDiary().single()
+            assertEquals(
+                listOf("2026-09-24T02:00:00+02:00"),
+                night.events
+                    .filter { it.type == SleepEventType.LONG_AWAKE }
+                    .map { it.startAt },
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun repeatedWakeExtendsOneWindowAndFinalGetUpClampsIt() {
+        val name = "sleep-wake-window-" + UUID.randomUUID()
+        val repository = TrainlogRepository(context, name)
+        try {
+            repository.quickSleepBedTime("2026-09-23T22:05:00+02:00")
+            repository.quickSleepWake("2026-09-24T04:11:00+02:00")
+            repository.quickSleepWake("2026-09-24T04:14:00+02:00")
+
+            val extended = repository.listSleepDiary().single()
+            assertEquals(
+                listOf("2026-09-24T04:11:00+02:00" to "2026-09-24T04:44:00+02:00"),
+                extended.events
+                    .filter { it.type == SleepEventType.LONG_AWAKE }
+                    .map { it.startAt to it.endAt },
+            )
+
+            repository.quickSleepFinalGetUp("2026-09-24T04:14:30+02:00")
+            val completed = repository.listSleepDiary().single()
+            assertEquals(
+                listOf("2026-09-24T04:11:00+02:00" to "2026-09-24T04:14:30+02:00"),
+                completed.events
+                    .filter { it.type == SleepEventType.LONG_AWAKE }
+                    .map { it.startAt to it.endAt },
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+
+    @Test
+    fun bedtimeAndFinalGetUpWithoutMeasurementFabricateNoCapture() {
+        val name = "sleep-no-sensor-" + UUID.randomUUID()
+        val repository = TrainlogRepository(context, name)
+        try {
+            repository.quickSleepBedTime("2026-09-23T22:30:00+02:00")
+            repository.quickSleepFinalGetUp("2026-09-24T06:31:00+02:00")
+            assertNull(repository.activeHeartRateCapture())
+            assertEquals(
+                0,
+                JSONObject(repository.buildHeartRateV1Json()).getJSONArray("captures").length(),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(name)
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/StatisticsRepositoryTest.kt

@@ -296,7 +296,7 @@ class StatisticsRepositoryTest {
     }
 
     private fun session(db: SQLiteDatabase, id: String, timestamp: String, type: String = "training") {
-        db.execSQL("INSERT INTO sessions(session_id,started_at,session_type) VALUES(?,?,?)", arrayOf(id, timestamp, type))
+        db.execSQL("INSERT INTO sessions(session_id,started_at,session_type,session_kind) VALUES(?,?,?,?)", arrayOf(id, timestamp, type, type))
     }
 
     private fun occurrence(

android/app/src/test/java/com/labfytools/trainlog/data/SyncConversationOwnershipTest.kt

@@ -0,0 +1,251 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import java.io.File
+import java.nio.file.Files
+import java.time.Duration
+import java.util.UUID
+import java.util.concurrent.CountDownLatch
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.atomic.AtomicReference
+import org.json.JSONArray
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SyncConversationOwnershipTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    private fun request(root: File, runId: String, androidPeer: String, desktopPeer: String) {
+        File(root, "request-v1.json").writeText(
+            JSONObject()
+                .put("format", "trainlog-sync-generation-request")
+                .put("version", 1)
+                .put("run_id", runId)
+                .put("android_peer_id", androidPeer)
+                .put("desktop_peer_id", desktopPeer)
+                .toString()
+        )
+    }
+
+    private fun archiveAcknowledgements(
+        root: File,
+        runId: String,
+        androidPeer: String,
+        desktopPeer: String,
+    ) {
+        File(root, "desktop-archive-acknowledgements-v1.json").writeText(
+            JSONObject()
+                .put("format", "trainlog-sync-archive-acknowledgements")
+                .put("version", 1)
+                .put("run_id", runId)
+                .put("android_peer_id", androidPeer)
+                .put("desktop_peer_id", desktopPeer)
+                .put("acknowledgements", JSONArray())
+                .toString()
+        )
+    }
+
+    @Test
+    fun explicitClickYieldsOldBackgroundAndPublishesFreshTriggerForNewRun() {
+        val databaseName = "generation-ownership-${UUID.randomUUID()}.db"
+        val root = Files.createTempDirectory("trainlog-generation-ownership-").toFile()
+        val repository = TrainlogRepository(context, databaseName)
+        val arbiter = SyncConversationArbiter()
+        val oldObserved = CountDownLatch(1)
+        val capturedRuns = mutableListOf<String>()
+        val desktopPeer = "peer_${UUID.randomUUID()}"
+        val oldRun = "sy_${UUID.randomUUID()}"
+        val newRun = "sy_${UUID.randomUUID()}"
+        val service = SyncGenerationService(repository)
+        val background =
+            SyncGenerationCoordinator(
+                repository,
+                arbiter = arbiter,
+                trace = SyncGenerationTrace { runId, phase, _, _, _ ->
+                    if (phase == "generation_request_observed" && runId == oldRun) oldObserved.countDown()
+                },
+            )
+        val foreground =
+            SyncGenerationCoordinator(
+                repository,
+                arbiter = arbiter,
+                trace = SyncGenerationTrace { runId, phase, _, _, _ ->
+                    if (phase == "generation_captured") synchronized(capturedRuns) {
+                        capturedRuns += checkNotNull(runId)
+                    }
+                },
+            )
+        val executor = java.util.concurrent.Executors.newFixedThreadPool(2)
+        try {
+            request(root, oldRun, service.peerId(), desktopPeer)
+            File(root, "trainlog-sync-request-v1.json").writeText(
+                """{"format":"trainlog-sync-request","version":1,"request_id":"sr_old"}"""
+            )
+            val old = executor.submit<ForegroundGenerationResult> {
+                background.run(root, Duration.ofSeconds(3))
+            }
+            assertTrue(oldObserved.await(2, TimeUnit.SECONDS))
+
+            val claim = arbiter.announceExplicit()
+            val snapshot =
+                (DirectExchangePublisher { directExchangeDirectoryForPath(root) }.snapshot()
+                    as DirectExchangeSnapshotResult.Ready).snapshot
+            val outbox = SyncRequestOutbox { directExchangeDirectoryForPath(root) }
+            var freshRequestId = ""
+            val explicit = executor.submit<ForegroundGenerationResult> {
+                foreground.run(
+                    root,
+                    Duration.ofMillis(700),
+                    afterPeerPublication = {
+                        freshRequestId =
+                            (outbox.requestSync(snapshot) as SyncRequestResult.Requested).requestId
+                        request(root, newRun, service.peerId(), desktopPeer)
+                        archiveAcknowledgements(root, newRun, service.peerId(), desktopPeer)
+                    },
+                    intent = SyncConversationIntent.NEW_EXPLICIT,
+                    explicitClaim = claim,
+                )
+            }
+
+            assertTrue(old.get(2, TimeUnit.SECONDS) is ForegroundGenerationResult.Superseded)
+            assertTrue(explicit.get(3, TimeUnit.SECONDS) is ForegroundGenerationResult.Failed)
+            assertNotEquals("sr_old", freshRequestId)
+            assertEquals(
+                freshRequestId,
+                JSONObject(File(root, "trainlog-sync-request-v1.json").readText())
+                    .getString("request_id"),
+            )
+            assertEquals(listOf(newRun), capturedRuns)
+            repository.inSyncGenerationTransaction { database ->
+                database.rawQuery("SELECT run_id FROM sync_generations", null).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(newRun, cursor.getString(0))
+                    assertEquals(false, cursor.moveToNext())
+                }
+            }
+        } finally {
+            executor.shutdownNow()
+            repository.close()
+            context.deleteDatabase(databaseName)
+            root.deleteRecursively()
+        }
+    }
+
+    @Test
+    fun terminalBackgroundRunStaysSuppressedUntilNewRequestOrRemoteEvidence() {
+        val databaseName = "generation-suppression-${UUID.randomUUID()}.db"
+        val root = Files.createTempDirectory("trainlog-generation-suppression-").toFile()
+        val repository = TrainlogRepository(context, databaseName)
+        try {
+            val service = SyncGenerationService(repository)
+            val coordinator = SyncGenerationCoordinator(repository, arbiter = SyncConversationArbiter())
+            val desktopPeer = "peer_${UUID.randomUUID()}"
+            val runId = "sy_${UUID.randomUUID()}"
+            request(root, runId, service.peerId(), desktopPeer)
+            service.capture(root, desktopPeer, runId)
+            val terminal = BackgroundTerminalRun(runId, coordinator.remoteEvidence(root, runId))
+
+            repeat(5) {
+                assertEquals(
+                    BackgroundRequestActionability.RESUMABLE_BUT_STALE,
+                    coordinator.classifyBackgroundRequest(root, terminal),
+                )
+            }
+
+            File(root, "desktop-consumption-ack-v1.json").writeText(
+                JSONObject()
+                    .put("format", "trainlog-sync-ack")
+                    .put("version", 1)
+                    .put("run_id", runId)
+                    .put("proof", "new")
+                    .toString()
+            )
+            assertEquals(
+                BackgroundRequestActionability.NEW_REMOTE_EVIDENCE,
+                coordinator.classifyBackgroundRequest(root, terminal),
+            )
+
+            request(root, "sy_${UUID.randomUUID()}", service.peerId(), desktopPeer)
+            assertEquals(
+                BackgroundRequestActionability.NEW_REQUEST,
+                coordinator.classifyBackgroundRequest(root, terminal),
+            )
+        } finally {
+            repository.close()
+            context.deleteDatabase(databaseName)
+            root.deleteRecursively()
+        }
+    }
+
+    @Test
+    fun cancelledExplicitConversationHandsSameGenerationToBackgroundWithoutDuplication() {
+        val databaseName = "generation-handoff-${UUID.randomUUID()}.db"
+        val root = Files.createTempDirectory("trainlog-generation-handoff-").toFile()
+        val repository = TrainlogRepository(context, databaseName)
+        val arbiter = SyncConversationArbiter()
+        val published = CountDownLatch(1)
+        val result = AtomicReference<ForegroundGenerationResult>()
+        val desktopPeer = "peer_${UUID.randomUUID()}"
+        val oldRunId = "sy_${UUID.randomUUID()}"
+        val runId = "sy_${UUID.randomUUID()}"
+        try {
+            val service = SyncGenerationService(repository)
+            request(root, oldRunId, service.peerId(), desktopPeer)
+            val coordinator =
+                SyncGenerationCoordinator(
+                    repository,
+                    arbiter = arbiter,
+                    trace = SyncGenerationTrace { _, phase, _, _, _ ->
+                        if (phase == "generation_reference_published") published.countDown()
+                    },
+                )
+            val claim = arbiter.announceExplicit()
+            val thread = Thread {
+                result.set(
+                    coordinator.run(
+                        root,
+                        Duration.ofSeconds(5),
+                        afterPeerPublication = {
+                            request(root, runId, service.peerId(), desktopPeer)
+                            archiveAcknowledgements(root, runId, service.peerId(), desktopPeer)
+                        },
+                        intent = SyncConversationIntent.NEW_EXPLICIT,
+                        explicitClaim = claim,
+                    )
+                )
+            }
+            thread.start()
+            assertTrue(published.await(3, TimeUnit.SECONDS))
+            thread.interrupt()
+            thread.join(3_000)
+            assertTrue(result.get() is ForegroundGenerationResult.Cancelled)
+            assertEquals(
+                BackgroundRequestActionability.ACTIVE_HANDOFF,
+                coordinator.classifyBackgroundRequest(root, null),
+            )
+
+            val resumed = coordinator.run(root, Duration.ofMillis(250))
+            assertTrue(resumed is ForegroundGenerationResult.Failed)
+            repository.inSyncGenerationTransaction { database ->
+                database.rawQuery("SELECT COUNT(*) FROM sync_generations WHERE run_id=?", arrayOf(runId))
+                    .use { cursor ->
+                        assertTrue(cursor.moveToFirst())
+                        assertEquals(1, cursor.getInt(0))
+                    }
+            }
+        } finally {
+            repository.close()
+            context.deleteDatabase(databaseName)
+            root.deleteRecursively()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/SyncDeploymentConversationTest.kt

@@ -0,0 +1,313 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import android.database.sqlite.SQLiteDatabase
+import androidx.test.core.app.ApplicationProvider
+import com.labfytools.trainlog.model.ActiveSessionDraft
+import com.labfytools.trainlog.model.NewExerciseProfile
+import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionSetDraft
+import com.labfytools.trainlog.model.TrackingMode
+import java.io.File
+import java.time.Duration
+import java.util.UUID
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SyncDeploymentConversationTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    private fun awaitFile(file: File): File {
+        val deadline = System.nanoTime() + Duration.ofSeconds(30).toNanos()
+        while (!file.isFile) {
+            if (System.nanoTime() >= deadline) error("timeout waiting for ${file.name}")
+            Thread.sleep(25)
+        }
+        return file
+    }
+
+    private fun publish(file: File, value: String) {
+        val temporary = File(file.parentFile, ".${file.name}.tmp-${UUID.randomUUID()}")
+        temporary.outputStream().use { output ->
+            output.write(value.toByteArray())
+            output.flush()
+            output.fd.sync()
+        }
+        check(temporary.renameTo(file)) { "cannot publish ${file.name}" }
+    }
+
+    @Test
+    fun foregroundAndroidServiceCompletesCorrelatedDesktopConversation() {
+        val suppliedTransport = System.getenv("TRAINLOG_SYNC_TRANSPORT_ROOT")
+        val transport =
+            suppliedTransport?.let(::File)
+                ?: kotlin.io.path.createTempDirectory("deployment-conversation-").toFile()
+        val repositoryRoot =
+            generateSequence(File(checkNotNull(System.getProperty("user.dir")))) { it.parentFile }
+                .first { File(it, "tools/sync_peer_worker.py").isFile }
+        val databaseName = "deployment-peer-${UUID.randomUUID()}.db"
+        var repository = TrainlogRepository(context, databaseName)
+        var localWorker: Process? = null
+        var lostDesktopAckGeneration: String? = null
+        try {
+            transport.mkdirs()
+            // A previous interrupted exchange leaves durable coordination
+            // objects behind. The next run must wait for correlated replacements.
+            File(transport, "desktop-consumption-ack-v1.json").writeText(
+                """{"run_id":"sy_11111111-1111-4111-8111-111111111111","generation_id":"gen_11111111-1111-4111-8111-111111111111"}"""
+            )
+            File(transport, "desktop-generation-v1.json").writeText(
+                """{"run_id":"sy_11111111-1111-4111-8111-111111111111","generation_id":"gen_22222222-2222-4222-8222-222222222222"}"""
+            )
+            val exercise =
+                (repository.createExercise(
+                        NewExerciseProfile(
+                            "Deployment conversation",
+                            RecordingMode.SETS,
+                            TrackingMode.REPS,
+                            0,
+                        )
+                    ) as CreateExerciseResult.Created)
+                    .exercise
+            val occurrence =
+                SessionExerciseDraft(
+                    exercise = exercise,
+                    sets = listOf(SessionSetDraft(reps = 7, weightKg = 22.5)),
+                )
+            assertEquals(
+                ActiveDraftMutationResult.Saved,
+                repository.saveActiveSessionDraft(
+                    ActiveSessionDraft(exercises = listOf(occurrence))
+                ),
+            )
+            val release = System.getenv("TRAINLOG_SYNC_TEST_RELEASE_FILE")
+            val desktop = File(transport, "desktop.sqlite")
+            if (suppliedTransport == null) {
+                val fixture =
+                    ProcessBuilder(
+                            File(repositoryRoot, "build/tui/sync-generation-fixture").absolutePath,
+                            desktop.absolutePath,
+                        )
+                        .directory(repositoryRoot)
+                        .start()
+                assertEquals(0, fixture.waitFor())
+            }
+            val conversations = if (suppliedTransport == null) 24 else 1
+            repeat(conversations) {
+                val visibilityEvents = mutableListOf<List<String>>()
+                val tracePhases = mutableListOf<String>()
+                val coordinator = SyncGenerationForegroundCoordinator(
+                    repository,
+                    MtpPublicationVisibility { files ->
+                        visibilityEvents += files.map(File::getName)
+                    },
+                    SyncGenerationTrace { _, phase, _, _, _ -> tracePhases += phase },
+                )
+                val executor = java.util.concurrent.Executors.newSingleThreadExecutor()
+                var requestSignals = 0
+                var refreshedAfterDesktopReference = false
+                val result =
+                    executor.submit<ForegroundGenerationResult> {
+                        coordinator.run(
+                            transport,
+                            Duration.ofSeconds(30),
+                            afterPeerPublication = { requestSignals += 1 },
+                            afterPublication = { release?.let { awaitFile(File(it)) } },
+                            pollTransport = {
+                                refreshedAfterDesktopReference =
+                                    runCatching {
+                                        JSONObject(File(transport, "desktop-generation-v1.json").readText())
+                                            .optString("format") ==
+                                            "trainlog-sync-generation-reference"
+                                    }.getOrDefault(false)
+                            },
+                        )
+                    }
+                val peer = JSONObject(awaitFile(File(transport, "android-peer-v1.json")).readText())
+                if (suppliedTransport == null) {
+                    localWorker =
+                    ProcessBuilder(
+                            "python3",
+                            File(repositoryRoot, "tools/sync_peer_worker.py").absolutePath,
+                            "--database",
+                            desktop.absolutePath,
+                            "--transport-root",
+                            transport.absolutePath,
+                            "--owned-root",
+                            File(transport, "owned").absolutePath,
+                            "--run-id",
+                            "sy_${UUID.randomUUID()}",
+                            "--expected-peer",
+                            peer.getString("peer_id"),
+                            "--timeout",
+                            "30",
+                        )
+                        .directory(repositoryRoot)
+                        .redirectErrorStream(true)
+                        .start()
+                }
+                val completed = result.get(35, java.util.concurrent.TimeUnit.SECONDS)
+                executor.shutdownNow()
+                assertTrue(
+                    "conversation ${it + 1}: $completed",
+                    completed is ForegroundGenerationResult.Completed,
+                )
+                assertEquals("one fresh request signal per conversation", 1, requestSignals)
+                assertTrue(
+                    "transport is refreshed after the correlated desktop reference",
+                    refreshedAfterDesktopReference,
+                )
+                val referenceVisibility = visibilityEvents.indexOfFirst {
+                    it == listOf("android-generation-v1.json")
+                }
+                val objectVisibility = visibilityEvents.indexOfFirst { "manifest.json" in it }
+                assertTrue("generation objects must become visible", objectVisibility >= 0)
+                assertTrue(
+                    "reference must follow complete object visibility",
+                    referenceVisibility > objectVisibility,
+                )
+                assertTrue(
+                    tracePhases.containsAll(
+                        listOf(
+                            "peer_published",
+                            "full_generation_trigger_published",
+                            "generation_request_observed",
+                            "archive_ack_observed",
+                            "android_archive_ack_published",
+                            "generation_capture_started",
+                            "generation_captured",
+                            "generation_objects_published",
+                            "generation_reference_published",
+                            "desktop_ack_observed",
+                            "desktop_generation_observed",
+                            "desktop_generation_consumed",
+                            "android_ack_published",
+                            "completed",
+                        )
+                    )
+                )
+                var workerOutput = ""
+                localWorker?.let { worker ->
+                    workerOutput = worker.inputStream.bufferedReader().readText()
+                    assertEquals("worker failed:\n$workerOutput", 0, worker.waitFor())
+                    assertTrue(workerOutput.contains("\"result\":\"completed\""))
+                }
+                if (suppliedTransport == null && it == 7) {
+                    // Reproduce the deployed pre-archive state: those builds
+                    // advanced producer status but did not retain received
+                    // ACK rows. The next real worker conversation must return
+                    // the desktop consumer's exact evidence and unblock the
+                    // full active quota without deleting any generation.
+                    repository.inSyncGenerationTransaction { database ->
+                        database.delete("sync_acknowledgements", null, null)
+                        database.rawQuery(
+                            "SELECT COUNT(*) FROM sync_generations WHERE status='acknowledged'",
+                            null,
+                        ).use { cursor ->
+                            assertTrue(cursor.moveToFirst())
+                            assertEquals(8, cursor.getInt(0))
+                        }
+                    }
+                }
+                if (suppliedTransport == null && it == 11) {
+                    /* Reproduce the inverse deployed failure: Android has
+                     * durably consumed the newest desktop generation, but its
+                     * ACK was lost before the desktop producer committed it.
+                     * The next conversation must recover that exact Android
+                     * evidence before capturing another desktop generation. */
+                    SQLiteDatabase.openDatabase(
+                        desktop.absolutePath,
+                        null,
+                        SQLiteDatabase.OPEN_READWRITE,
+                    ).use { database ->
+                        val generation =
+                            database.rawQuery(
+                                "SELECT generation_id FROM sync_generations " +
+                                    "WHERE status='acknowledged' ORDER BY generated_at DESC LIMIT 1",
+                                null,
+                            ).use { cursor ->
+                                assertTrue(cursor.moveToFirst())
+                                cursor.getString(0)
+                            }
+                        database.delete(
+                            "sync_acknowledgements",
+                            "generation_id=?",
+                            arrayOf(generation),
+                        )
+                        database.execSQL(
+                            "UPDATE sync_generations SET status='waiting_acknowledgement'," +
+                                "acknowledged_at=NULL WHERE generation_id=?",
+                            arrayOf(generation),
+                        )
+                        database.rawQuery(
+                            "SELECT status FROM sync_generations WHERE generation_id=?",
+                            arrayOf(generation),
+                        ).use { cursor ->
+                            assertTrue(cursor.moveToFirst())
+                            assertEquals("waiting_acknowledgement", cursor.getString(0))
+                        }
+                        lostDesktopAckGeneration = generation
+                    }
+                }
+                if (suppliedTransport == null && it == 12) {
+                    val recovered = checkNotNull(lostDesktopAckGeneration)
+                    SQLiteDatabase.openDatabase(
+                        desktop.absolutePath,
+                        null,
+                        SQLiteDatabase.OPEN_READONLY,
+                    ).use { database ->
+                        database.rawQuery(
+                            "SELECT status FROM sync_generations WHERE generation_id=?",
+                            arrayOf(recovered),
+                        ).use { cursor ->
+                            assertTrue(cursor.moveToFirst())
+                            assertEquals("acknowledged", cursor.getString(0))
+                        }
+                        database.rawQuery(
+                            "SELECT parent_generation_id,status FROM sync_generations " +
+                                "ORDER BY generated_at DESC LIMIT 1",
+                            null,
+                        ).use { cursor ->
+                            assertTrue(cursor.moveToFirst())
+                            assertEquals(recovered, cursor.getString(0))
+                            assertEquals("acknowledged", cursor.getString(1))
+                        }
+                    }
+                }
+                localWorker = null
+            }
+            repository.close()
+            repository = TrainlogRepository(context, databaseName)
+            assertTrue(repository.loadActiveSessionDraft() is ActiveDraftLoadResult.Loaded)
+            if (suppliedTransport == null) {
+                SQLiteDatabase.openDatabase(
+                    context.getDatabasePath(databaseName).absolutePath,
+                    null,
+                    SQLiteDatabase.OPEN_READONLY,
+                ).use { database ->
+                    database.rawQuery("SELECT COUNT(*) FROM sync_generation_archives", null).use {
+                        assertTrue(it.moveToFirst())
+                        assertTrue(it.getInt(0) >= 16)
+                    }
+                    database.rawQuery("SELECT COUNT(*) FROM sync_generations", null).use {
+                        assertTrue(it.moveToFirst())
+                        assertEquals(24, it.getInt(0))
+                    }
+                }
+            }
+        } finally {
+            localWorker?.destroyForcibly()
+            repository.close()
+            context.deleteDatabase(databaseName)
+            if (suppliedTransport == null) transport.deleteRecursively()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/SyncGenerationConversationLockTest.kt

@@ -0,0 +1,56 @@
+package com.labfytools.trainlog.data
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import java.nio.file.Files
+import java.time.Duration
+import java.util.UUID
+import java.util.concurrent.CountDownLatch
+import java.util.concurrent.TimeUnit
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SyncGenerationConversationLockTest {
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun foregroundConversationCannotBeStolenByBackgroundCoordinator() {
+        val databaseName = "generation-lock-${UUID.randomUUID()}.db"
+        val root = Files.createTempDirectory("trainlog-generation-lock-").toFile()
+        val repository = TrainlogRepository(context, databaseName)
+        val entered = CountDownLatch(1)
+        val executor = java.util.concurrent.Executors.newSingleThreadExecutor()
+        try {
+            val foreground = SyncGenerationCoordinator(repository)
+            val background = SyncGenerationCoordinator(repository)
+            val active = executor.submit<ForegroundGenerationResult> {
+                foreground.run(
+                    root,
+                    Duration.ofMillis(300),
+                    afterPeerPublication = { entered.countDown() },
+                )
+            }
+            assertTrue(entered.await(2, TimeUnit.SECONDS))
+            val duplicate = background.run(root, Duration.ofMillis(10))
+            assertEquals(ForegroundGenerationResult.Busy, duplicate)
+            assertTrue(active.get(2, TimeUnit.SECONDS) is ForegroundGenerationResult.Failed)
+            repository.inSyncGenerationTransaction { database ->
+                database.rawQuery("SELECT COUNT(*) FROM sync_generations", null).use { cursor ->
+                    assertTrue(cursor.moveToFirst())
+                    assertEquals(0, cursor.getInt(0))
+                }
+            }
+        } finally {
+            executor.shutdownNow()
+            repository.close()
+            context.deleteDatabase(databaseName)
+            root.deleteRecursively()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/data/SyncRequestOutboxTest.kt

@@ -0,0 +1,59 @@
+package com.labfytools.trainlog.data
+
+import java.nio.file.Files
+import org.json.JSONObject
+import org.junit.Assert.assertNotEquals
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [35])
+class SyncRequestOutboxTest {
+    @Test
+    fun distinctExplicitRequestsAlwaysPublishFreshIdentities() {
+        val directory = Files.createTempDirectory("trainlog-request-outbox-").toFile()
+        try {
+            val outbox = SyncRequestOutbox { directExchangeDirectoryForPath(directory) }
+            val snapshot =
+                (DirectExchangePublisher { directExchangeDirectoryForPath(directory) }.snapshot()
+                    as DirectExchangeSnapshotResult.Ready).snapshot
+            val first = outbox.requestSync(snapshot) as SyncRequestResult.Requested
+            val firstBytes = java.io.File(directory, "trainlog-sync-request-v1.json").readText()
+            val second = outbox.requestSync(snapshot) as SyncRequestResult.Requested
+            val secondBytes = java.io.File(directory, "trainlog-sync-request-v1.json").readText()
+
+            assertNotEquals(first.requestId, second.requestId)
+            assertNotEquals(firstBytes, secondBytes)
+            assertTrue(JSONObject(secondBytes).getString("request_id") == second.requestId)
+        } finally {
+            directory.deleteRecursively()
+        }
+    }
+
+    @Test
+    fun oneIntentUsesSameIdentityAcrossFullGenerationAndLegacyChannels() {
+        val directory = Files.createTempDirectory("trainlog-dual-request-").toFile()
+        try {
+            val outbox = SyncRequestOutbox { directExchangeDirectoryForPath(directory) }
+            val snapshot =
+                (DirectExchangePublisher { directExchangeDirectoryForPath(directory) }.snapshot()
+                    as DirectExchangeSnapshotResult.Ready).snapshot
+            val intent = outbox.newIntent()
+
+            assertTrue(outbox.publishFullGeneration(snapshot, intent) is SyncRequestResult.Requested)
+            assertTrue(outbox.publishLegacy(snapshot, intent) is SyncRequestResult.Requested)
+
+            val full = JSONObject(java.io.File(directory, FULL_GENERATION_REQUEST_NAME).readText())
+            val legacy = JSONObject(java.io.File(directory, LEGACY_SYNC_REQUEST_NAME).readText())
+            assertEquals(intent.requestId, full.getString("request_id"))
+            assertEquals(intent.requestId, legacy.getString("request_id"))
+            assertEquals(full.toString(), legacy.toString())
+        } finally {
+            directory.deleteRecursively()
+        }
+    }
+}

android/app/src/test/java/com/labfytools/trainlog/ui/AiSessionDraftUiWiringTest.kt

@@ -12,8 +12,9 @@ import androidx.compose.ui.test.junit4.createComposeRule
 import androidx.compose.ui.test.onNodeWithText
 import androidx.compose.ui.test.onNodeWithContentDescription
 import androidx.compose.ui.test.onNodeWithTag
-import androidx.compose.ui.test.onNodeWithTag
 import androidx.compose.ui.test.performClick
+import androidx.compose.ui.test.performTextClearance
+import androidx.compose.ui.test.performTextInput
 import androidx.compose.ui.test.performSemanticsAction
 import androidx.compose.ui.semantics.SemanticsActions
 import androidx.compose.ui.input.key.Key
@@ -28,8 +29,12 @@ import com.labfytools.trainlog.data.ActiveDraftMutationResult
 import com.labfytools.trainlog.data.AiSessionDraftImportResult
 import com.labfytools.trainlog.data.CreateExerciseResult
 import com.labfytools.trainlog.data.TrainlogRepository
+import com.labfytools.trainlog.model.ActiveSessionDraft
 import com.labfytools.trainlog.model.NewExerciseProfile
 import com.labfytools.trainlog.model.RecordingMode
+import com.labfytools.trainlog.model.SessionExerciseDraft
+import com.labfytools.trainlog.model.SessionExercisePlan
+import com.labfytools.trainlog.model.SessionLoadMode
 import com.labfytools.trainlog.model.TrackingMode
 import com.labfytools.trainlog.ui.theme.TrainlogTheme
 import java.util.UUID
@@ -115,7 +120,7 @@ class AiSessionDraftUiWiringTest {
         assertEquals(ActiveDraftMutationResult.Saved, repository.startActiveSessionDraft())
         var createCalls = 0
         compose.setContent { TrainlogTheme {
-            SessionScreen(repository, 0, {}, { createCalls++ }, {})
+            SessionScreen(repository, 0, {}, { createCalls++ }, { _ -> }, {})
         } }
 
         val create = compose.onNodeWithTag("active-session-create-exercise")
@@ -130,6 +135,84 @@ class AiSessionDraftUiWiringTest {
         compose.runOnIdle { assertEquals(1, createCalls) }
     }
 
+    @Test
+    fun modifyingTargetOnlyOccurrenceRendersItsPrefilledEditor() {
+        val walk = createExercise("Marche ciblée", RecordingMode.CONTINUOUS, TrackingMode.DURATION)
+        val press = createExercise("Presse ciblée", RecordingMode.SETS, TrackingMode.REPS)
+        val walkEntry = SessionExerciseDraft(
+            entryId = "spe_11111111-1111-4111-8111-111111111111",
+            exercise = walk,
+            plan = SessionExercisePlan(sets = 0, durationSeconds = 600),
+        )
+        val pressEntry = SessionExerciseDraft(
+            entryId = "spe_22222222-2222-4222-8222-222222222222",
+            exercise = press,
+            plan = SessionExercisePlan(
+                sets = 3,
+                reps = 10,
+                weightKg = 52.0,
+                loadMode = SessionLoadMode.EXTERNAL,
+                restSeconds = 90,
+            ),
+        )
+        assertEquals(
+            ActiveDraftMutationResult.Saved,
+            repository.saveActiveSessionDraft(
+                ActiveSessionDraft(exercises = listOf(walkEntry, pressEntry)),
+            ),
+        )
+        val loaded = (repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded).draft
+        assertEquals(
+            ActiveDraftMutationResult.Saved,
+            repository.saveActiveSessionDraft(
+                loaded.copy(form = formForExistingExercise(loaded.exercises[0], 0)),
+            ),
+        )
+        assertEquals(
+            ActiveDraftMutationResult.Saved,
+            repository.saveActiveSessionDraft(loaded),
+        )
+        compose.setContent {
+            TrainlogTheme { SessionScreen(repository, 0, {}, {}, { _ -> }, {}) }
+        }
+
+        compose.onNodeWithTag("edit-draft-exercise-${walkEntry.entryId}")
+            .performSemanticsAction(SemanticsActions.OnClick)
+
+        compose.runOnIdle {
+            val active = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(walk.exerciseId, active.draft.form.selectedExercise?.exerciseId)
+        }
+        compose.onNodeWithText("SAISIE — Marche ciblée").assertExists()
+        compose.onNodeWithTag("session-continuous-duration").assertExists()
+        compose.onNodeWithText("Ajouter à la séance").assertExists()
+
+        compose.onNodeWithTag("session-continuous-duration").performTextClearance()
+        compose.onNodeWithTag("session-continuous-duration").performTextInput("12")
+        compose.onNodeWithTag("add-to-session")
+            .performSemanticsAction(SemanticsActions.OnClick)
+        compose.runOnIdle {
+            val active = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(2, active.draft.exercises.size)
+            assertEquals(walkEntry.entryId, active.draft.exercises[0].entryId)
+            assertEquals(720, active.draft.exercises[0].continuousDurationSeconds)
+            assertEquals(600, active.draft.exercises[0].plan?.durationSeconds)
+            assertEquals(pressEntry, active.draft.exercises[1])
+        }
+
+        compose.onNodeWithTag("edit-draft-exercise-${pressEntry.entryId}")
+            .performSemanticsAction(SemanticsActions.OnClick)
+        compose.onNodeWithText("SAISIE — Presse ciblée").assertExists()
+        compose.onNodeWithTag("cancel-session-exercise-editor")
+            .performSemanticsAction(SemanticsActions.OnClick)
+        compose.runOnIdle {
+            val active = repository.loadActiveSessionDraft() as ActiveDraftLoadResult.Loaded
+            assertEquals(720, active.draft.exercises[0].continuousDurationSeconds)
+            assertEquals(pressEntry, active.draft.exercises[1])
+            assertEquals(null, active.draft.form.selectedExercise)
+        }
+    }
+
     @Test
     fun draftScreenShowsDosBicepsAndTargetDetails() {
         importDraft()
@@ -139,8 +222,8 @@ class AiSessionDraftUiWiringTest {
         } }
 
         compose.onNodeWithText("Dos + biceps").assertIsDisplayed()
-        compose.onNodeWithText("Tractions supination · 3 × 10 répétitions · repos 90 s")
-            .assertIsDisplayed()
+        compose.onNodeWithText("Tractions supination").assertIsDisplayed()
+        compose.onNodeWithText("3 × 10 · repos 90 s").assertIsDisplayed()
         compose.onNodeWithText("Accent sur le dos et les biceps.").assertIsDisplayed()
     }
 
@@ -299,6 +382,15 @@ class AiSessionDraftUiWiringTest {
         return payload
     }
 
+    private fun createExercise(
+        name: String,
+        recordingMode: RecordingMode,
+        trackingMode: TrackingMode,
+    ) =
+        (repository.createExercise(
+            NewExerciseProfile(name, recordingMode, trackingMode, 0),
+        ) as CreateExerciseResult.Created).exercise
+
     private fun artifact(exerciseId: String): String {
         val target = JSONObject().put("sets", 3).put("reps", 10)
             .put("duration_seconds", JSONObject.NULL).put("weight_kg", JSONObject.NULL)

android/app/src/test/java/com/labfytools/trainlog/ui/AndroidUiRedesignTest.kt

@@ -36,14 +36,10 @@ class AndroidUiRedesignTest {
                 HomeScreen(
                     activeDraft = null,
                     draftError = null,
-                    latestSession = null,
-                    latestMaximum = null,
                     bodyZoneOverview = BodyZoneHomeOverview(emptyList(), emptyList(), false, false),
                     onSession = {},
                     onOpenExercises = {},
-                    onOpenStatistics = {},
                     onBody = { bodyCalls++ },
-                    onOpenLatestSession = {},
                     onSync = { syncCalls++ },
                 )
             }