Trainlog v0.1.5 completes the factual cardio capture cycle and makes the
Android-to-Web Sleep workflow ready for real nightly use without adding
medical, sleep-stage, or causal inference.

## Heart-rate capture and cardio sessions

- Android persistently acquires real CYCPLUS Heart Rate Service measurements,
  retains factual observation timestamps, BPM and raw RR values, and exposes a
  global fresh/stale/disconnected indicator.
- Training occurrences have explicit start/end timelines so synchronized
  heart-rate samples retain their stable exercise ownership instead of
  inferring it later from time overlap.
- Dedicated `cardio` sessions, measured calibration profiles and fresh-signal
  BPM-guided phases use separate versioned companions and preserve the frozen
  historical session formats.
- Guidance suspends on stale signal and records measured facts only; it does
  not estimate fitness, recovery, readiness or medical state.

## Factual Web timelines

- History and Sleep display synchronized heart-rate samples through one
  bounded native read model and responsive Web timeline.
- Full-source min/mean/max and RR counts remain exact while large visual
  projections are bounded.
- Cardio timelines show factual occurrence bounds, resolved targets,
  instruction changes and measured calibration points.
- Sleep highlights notable relative rises and falls with a deterministic local
  median rule, explicitly without assigning a sleep stage or cause.

## Sleep capture and medication quantity

- Medication can be recorded before Couché. The first intake creates one
  durable pending 18:00-to-18:00 night; Couché advances the same stable entry,
  Réveil leaves heart-rate capture running, and Levé closes it at the factual
  final-get-up timestamp.
- A missing sensor fabricates neither a capture nor a sample.
- Sleep Diary V2 carries structured per-intake quantity while published V1
  remains strict and readable; historical intakes default to quantity one.
- The Web agenda renders every night in the selected period on one aligned
  18:00-to-18:00 axis, and the selected night owns the full-width heart-rate
  detail. PDF reports retain their multi-night behavior and display quantity
  without replacing per-unit dose.

## Compatibility and validation

- Desktop schema v35 and Android schema v32 are additive migrations.
- `TRAINLOG_FORMAT_V1`, mobile export V3, stable identities, causal revision
  lineage, generation/ACK semantics and Bluetooth/MTP transport ownership are
  unchanged.
- Native tests, Android unit tests and APK assembly, Web tests/typecheck/build,
  JSON/import validation, changed-C formatting and exact Sleep V2 replay all
  pass at the release tag.

## Assets

- `trainlog-android-v0.1.5.apk`: signed public Android APK.
- `trainlog-tui-linux-x86_64-v0.1.5`: Linux x86-64 runtime bundle containing
  the TUI, local Web adapter, synchronization helpers and required catalogs.
- `SHA256SUMS`: SHA-256 checksums for both artifacts.