HealthTracking/docs/superpowers/specs/2026-06-10-fightrate-continuous-monitoring-training-windows.md

FightRate RN — Continuous Monitoring + Training Windows

Objective

Change FightRate so BLE heart-rate monitoring is continuous and locally persisted, while a workout/training session is only a marked time window inside that continuous stream. Starting a workout begins a highlighted window; stopping it closes that window and keeps monitoring alive.

Success Criteria

• The native Android foreground service can start monitoring without creating a workout window.
• Samples are saved continuously even when no workout window is active.
• Start/stop workout only opens/closes a workout_sessions window; it does not stop BLE monitoring.
• History lists saved windows and each item can be opened to inspect details from samples inside that window.
• Insight and history screens use only real timestamped samples.
• Capture/History/Insights UI removes generic card-heavy containers and uses Corner Instrument rails, strips, dividers, and instrument surfaces.
• Existing bare React Native CLI constraint remains; no Expo.

Boundaries

• No new dependencies unless unavoidable.
• Do not delete existing tables destructively; migrate by adding a continuous sample table and deriving session summaries from timestamps.
• Android physical BLE validation remains required after APK install.

Verification

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