# FightRate RN — Background Capture + Corner Instrument Redesign

## Objective
Make the bare React Native Android app capture heart-rate data continuously until the athlete manually stops the workout, including when the screen is locked or the app is backgrounded. Replace foreground-JS BLE ownership and generic card UI with native Android capture ownership, local SQLite persistence, and Corner Instrument screens.

## Success Criteria
- Capture is started/stopped from React Native, but BLE scan/connect/monitor runs in an Android foreground service.
- Android manifest declares Bluetooth, notification, foreground service, and battery optimization permissions needed for continuous capture.
- The foreground service repeats scan/reconnect attempts unless stopped manually.
- Heart Rate Service `180D` and Heart Rate Measurement `2A37` are used for real BLE BPM data.
- Each BPM sample is timestamped and persisted locally in SQLite.
- History and insights use persisted real sessions/samples; no mock BPM/history/insight data is displayed.
- UI follows `FIGHTRATE_DESIGN_SYSTEM.md` / Corner Instrument: dark physical instrument surfaces, dominant BPM, technical strips, no nested generic card dashboard.
- Release APK builds as an installable arm64 artifact and is sent to Telegram.

## Boundaries
- React Native bare CLI only; no Expo.
- Android-first implementation; iOS background BLE is out of scope.
- Physical Magene H003 validation remains required on device.
- Manual destructive deletion of non-design project files is avoided.

## Verification
- `npm run typecheck`
- `npm run lint`
- `npm test -- --runInBand`
- `npm audit --audit-level=moderate`
- `cd FightRateRN/android && ./gradlew assembleRelease -PreactNativeArchitectures=arm64-v8a`