feat: Apple Watch app + Paywall + Privacy Policy + rebranding

## Major Features
- Apple Watch companion app (6 phases complete)
  - WatchConnectivity iPhone ↔ Watch
  - HealthKit integration (HR, calories)
  - SwiftUI premium UI
  - 9 complication types
  - Always-On Display support

- Paywall screen with RevenueCat integration
- Privacy Policy screen
- App rebranding: tabatago → TabataFit
- Bundle ID: com.millianlmx.tabatafit

## Changes
- New: ios/TabataFit Watch App/ (complete Watch app)
- New: app/paywall.tsx (subscription UI)
- New: app/privacy.tsx (privacy policy)
- New: src/features/watch/ (Watch sync hooks)
- New: admin-web/ (admin dashboard)
- Updated: app.json, package.json (branding)
- Updated: profile.tsx (paywall + privacy links)
- Updated: i18n translations (EN/FR/DE/ES)
- New: app icon 1024x1024

## Watch App Files
- TabataFitWatchApp.swift (entry point)
- ContentView.swift (premium UI)
- HealthKitManager.swift (HR + calories)
- WatchSessionManager.swift (communication)
- Complications/ (WidgetKit)
- UserDefaults+Shared.swift (data sharing)

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "tabatago",
+  "name": "tabatafit",
   "main": "expo-router/entry",
   "version": "1.0.0",
   "scripts": {
@@ -18,6 +18,7 @@
     "@react-navigation/bottom-tabs": "^7.4.0",
     "@react-navigation/elements": "^2.6.3",
     "@react-navigation/native": "^7.1.8",
+    "@supabase/supabase-js": "^2.98.0",
     "expo": "~54.0.33",
     "expo-application": "~7.0.8",
     "expo-av": "~16.0.8",
@@ -42,7 +43,9 @@
     "expo-video": "~3.0.16",
     "expo-web-browser": "~15.0.10",
     "i18next": "^25.8.12",
+    "lucide-react": "^0.576.0",
     "posthog-react-native": "^4.36.0",
+    "posthog-react-native-session-replay": "^1.5.0",
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "react-i18next": "^16.5.4",