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

.maestro/flows/all-tests.yaml

@@ -0,0 +1,27 @@
+# All Tests Suite
+# Run all test flows sequentially
+
+appId: com.millianlmx.tabatafit
+name: Full Test Suite
+
+env:
+  TEST_USER_NAME: Maestro Test User
+
+---
+# Run onboarding flow
+- runFlow: ./onboarding.yaml
+
+# Run program browsing
+- runFlow: ./program-browse.yaml
+
+# Run tab navigation
+- runFlow: ./tab-navigation.yaml
+
+# Run workout player
+- runFlow: ./workout-player.yaml
+
+# Run activity tab
+- runFlow: ./activity-tab.yaml
+
+# Run profile & settings
+- runFlow: ./profile-settings.yaml