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)

app/player/[id].tsx

@@ -29,9 +29,11 @@ import { useTranslation } from 'react-i18next'
 import { useTimer } from '@/src/shared/hooks/useTimer'
 import { useHaptics } from '@/src/shared/hooks/useHaptics'
 import { useAudio } from '@/src/shared/hooks/useAudio'
+import { useMusicPlayer } from '@/src/shared/hooks/useMusicPlayer'
 import { useActivityStore } from '@/src/shared/stores'
 import { getWorkoutById } from '@/src/shared/data'
 import { useTranslatedWorkout } from '@/src/shared/data/useTranslatedData'
+import { useWatchSync } from '@/src/features/watch'
 
 import { track } from '@/src/shared/services/analytics'
 import { BRAND, PHASE_COLORS, GRADIENTS, darkColors } from '@/src/shared/theme'
@@ -280,8 +282,37 @@ export default function PlayerScreen() {
   const timer = useTimer(rawWorkout ?? null)
   const audio = useAudio()
 
+  // Music player - synced with workout timer
+  useMusicPlayer({
+    vibe: workout?.musicVibe ?? 'electronic',
+    isPlaying: timer.isRunning && !timer.isPaused,
+  })
+
   const [showControls, setShowControls] = useState(true)
 
+  // Watch sync integration
+  const { isAvailable: isWatchAvailable, sendWorkoutState } = useWatchSync({
+    onPlay: () => {
+      timer.resume()
+      track('watch_control_play', { workout_id: workout?.id ?? id })
+    },
+    onPause: () => {
+      timer.pause()
+      track('watch_control_pause', { workout_id: workout?.id ?? id })
+    },
+    onSkip: () => {
+      timer.skip()
+      haptics.selection()
+      track('watch_control_skip', { workout_id: workout?.id ?? id })
+    },
+    onStop: () => {
+      haptics.phaseChange()
+      timer.stop()
+      router.back()
+      track('watch_control_stop', { workout_id: workout?.id ?? id })
+    },
+  })
+
   // Animation refs
   const timerScaleAnim = useRef(new Animated.Value(0.8)).current
   const phaseColor = PHASE_COLORS[timer.phase].fill
@@ -398,6 +429,34 @@ export default function PlayerScreen() {
     }
   }, [timer.timeRemaining])
 
+  // Sync workout state with Apple Watch
+  useEffect(() => {
+    if (!isWatchAvailable || !timer.isRunning) return;
+
+    sendWorkoutState({
+      phase: timer.phase,
+      timeRemaining: timer.timeRemaining,
+      currentRound: timer.currentRound,
+      totalRounds: timer.totalRounds,
+      currentExercise: timer.currentExercise,
+      nextExercise: timer.nextExercise,
+      calories: timer.calories,
+      isPaused: timer.isPaused,
+      isPlaying: timer.isRunning && !timer.isPaused,
+    });
+  }, [
+    timer.phase,
+    timer.timeRemaining,
+    timer.currentRound,
+    timer.totalRounds,
+    timer.currentExercise,
+    timer.nextExercise,
+    timer.calories,
+    timer.isPaused,
+    timer.isRunning,
+    isWatchAvailable,
+  ]);
+
   return (
     <View style={styles.container}>
       <StatusBar hidden />