feat: explore tab, React Query data layer, programs, sync, analytics, testing infrastructure

- Replace browse tab with Supabase-connected explore tab with filters
- Add React Query for data fetching with loading states
- Add 3 structured programs with weekly progression
- Add Supabase anonymous auth sync service
- Add PostHog analytics with screen tracking and events
- Add comprehensive test strategy (Vitest + Maestro E2E)
- Add RevenueCat subscription system with DEV simulation
- Add i18n translations for new screens (EN/FR/DE/ES)
- Add data deletion modal, sync consent modal
- Add assessment screen and program routes
- Add GitHub Actions CI workflow
- Update activity store with sync integration

README.md

@@ -5,6 +5,8 @@
 ![Expo](https://img.shields.io/badge/Expo-52-black)
 ![TypeScript](https://img.shields.io/badge/TypeScript-5.0-blue)
 ![License](https://img.shields.io/badge/License-Proprietary-red)
+![Tests](https://img.shields.io/badge/Tests-546%20passing-brightgreen)
+![Coverage](https://img.shields.io/badge/Coverage-Statements%20%7C%20Branches%20%7C%20Functions%20%7C%20Lines-blue)
 
 ## Vision
 
@@ -66,6 +68,41 @@ src/
 app/             # Expo Router routes
 ```
 
+## Testing
+
+```bash
+# Unit tests with coverage
+npm run test:coverage
+
+# Component render tests
+npm run test:render
+
+# All unit + render tests
+npm test && npm run test:render
+
+# Maestro E2E (requires Expo dev server + simulator)
+npm run test:maestro
+
+# Admin-web tests
+cd admin-web && npm test           # Unit tests
+cd admin-web && npm run test:e2e   # Playwright E2E
+```
+
+### Test Coverage
+
+| Layer | Target | Tests |
+|-------|--------|-------|
+| Stores | 80%+ | playerStore, activityStore, userStore, programStore |
+| Services | 80%+ | analytics, music, purchases, sync |
+| Hooks | 70%+ | useTimer, useHaptics, useAudio, usePurchases, useMusicPlayer, useNotifications, useSupabaseData |
+| Components | 50%+ | StyledText, VideoPlayer, WorkoutCard, GlassCard, CollectionCard, modals, Skeleton |
+| Data | 80%+ | achievements, collections, programs, trainers, workouts |
+
+### E2E Tests
+
+- **Mobile (Maestro)**: Onboarding, tab navigation, program browse, workout player, activity, profile/settings
+- **Admin Web (Playwright)**: Auth, navigation, workouts CRUD, trainers, collections
+
 ## License
 
 Proprietary — All rights reserved.