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/admin/index.tsx

@@ -0,0 +1,212 @@
+import { useState, useCallback } from 'react'
+import {
+  View,
+  Text,
+  ScrollView,
+  TouchableOpacity,
+  StyleSheet,
+  RefreshControl,
+} from 'react-native'
+import { useRouter } from 'expo-router'
+import { useAdminAuth } from '../../src/admin/components/AdminAuthProvider'
+import { useWorkouts, useTrainers, useCollections } from '../../src/shared/hooks/useSupabaseData'
+
+export default function AdminDashboardScreen() {
+  const router = useRouter()
+  const { signOut } = useAdminAuth()
+  const [refreshing, setRefreshing] = useState(false)
+  
+  const { 
+    workouts, 
+    loading: workoutsLoading, 
+    refetch: refetchWorkouts 
+  } = useWorkouts()
+  
+  const { 
+    trainers, 
+    loading: trainersLoading, 
+    refetch: refetchTrainers 
+  } = useTrainers()
+  
+  const { 
+    collections, 
+    loading: collectionsLoading, 
+    refetch: refetchCollections 
+  } = useCollections()
+
+  const onRefresh = useCallback(async () => {
+    setRefreshing(true)
+    await Promise.all([
+      refetchWorkouts(),
+      refetchTrainers(),
+      refetchCollections(),
+    ])
+    setRefreshing(false)
+  }, [refetchWorkouts, refetchTrainers, refetchCollections])
+
+  const handleLogout = async () => {
+    await signOut()
+    router.replace('/admin/login')
+  }
+
+  const isLoading = workoutsLoading || trainersLoading || collectionsLoading
+
+  return (
+    <View style={styles.container}>
+      <View style={styles.header}>
+        <Text style={styles.title}>Admin Dashboard</Text>
+        <TouchableOpacity onPress={handleLogout} style={styles.logoutButton}>
+          <Text style={styles.logoutText}>Logout</Text>
+        </TouchableOpacity>
+      </View>
+
+      <ScrollView
+        style={styles.content}
+        refreshControl={
+          <RefreshControl refreshing={refreshing} onRefresh={onRefresh} tintColor="#FF6B35" />
+        }
+      >
+        <View style={styles.statsGrid}>
+          <View style={styles.statCard}>
+            <Text style={styles.statNumber}>{workouts.length}</Text>
+            <Text style={styles.statLabel}>Workouts</Text>
+          </View>
+          <View style={styles.statCard}>
+            <Text style={styles.statNumber}>{trainers.length}</Text>
+            <Text style={styles.statLabel}>Trainers</Text>
+          </View>
+          <View style={styles.statCard}>
+            <Text style={styles.statNumber}>{collections.length}</Text>
+            <Text style={styles.statLabel}>Collections</Text>
+          </View>
+        </View>
+
+        <Text style={styles.sectionTitle}>Quick Actions</Text>
+        
+        <View style={styles.actionsGrid}>
+          <TouchableOpacity 
+            style={styles.actionCard}
+            onPress={() => router.push('/admin/workouts')}
+          >
+            <Text style={styles.actionIcon}>💪</Text>
+            <Text style={styles.actionTitle}>Manage Workouts</Text>
+            <Text style={styles.actionDescription}>Add, edit, or delete workouts</Text>
+          </TouchableOpacity>
+
+          <TouchableOpacity 
+            style={styles.actionCard}
+            onPress={() => router.push('/admin/trainers')}
+          >
+            <Text style={styles.actionIcon}>👥</Text>
+            <Text style={styles.actionTitle}>Manage Trainers</Text>
+            <Text style={styles.actionDescription}>Update trainer profiles</Text>
+          </TouchableOpacity>
+
+          <TouchableOpacity 
+            style={styles.actionCard}
+            onPress={() => router.push('/admin/collections')}
+          >
+            <Text style={styles.actionIcon}>📁</Text>
+            <Text style={styles.actionTitle}>Manage Collections</Text>
+            <Text style={styles.actionDescription}>Organize workout collections</Text>
+          </TouchableOpacity>
+
+          <TouchableOpacity 
+            style={styles.actionCard}
+            onPress={() => router.push('/admin/media')}
+          >
+            <Text style={styles.actionIcon}>🎬</Text>
+            <Text style={styles.actionTitle}>Media Library</Text>
+            <Text style={styles.actionDescription}>Upload videos and images</Text>
+          </TouchableOpacity>
+        </View>
+      </ScrollView>
+    </View>
+  )
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: '#000',
+  },
+  header: {
+    flexDirection: 'row',
+    justifyContent: 'space-between',
+    alignItems: 'center',
+    padding: 20,
+    paddingTop: 60,
+    borderBottomWidth: 1,
+    borderBottomColor: '#1C1C1E',
+  },
+  title: {
+    fontSize: 28,
+    fontWeight: 'bold',
+    color: '#fff',
+  },
+  logoutButton: {
+    padding: 8,
+  },
+  logoutText: {
+    color: '#FF6B35',
+    fontSize: 16,
+  },
+  content: {
+    flex: 1,
+    padding: 20,
+  },
+  statsGrid: {
+    flexDirection: 'row',
+    gap: 12,
+    marginBottom: 32,
+  },
+  statCard: {
+    flex: 1,
+    backgroundColor: '#1C1C1E',
+    borderRadius: 12,
+    padding: 16,
+    alignItems: 'center',
+  },
+  statNumber: {
+    fontSize: 32,
+    fontWeight: 'bold',
+    color: '#FF6B35',
+  },
+  statLabel: {
+    fontSize: 14,
+    color: '#999',
+    marginTop: 4,
+  },
+  sectionTitle: {
+    fontSize: 20,
+    fontWeight: 'bold',
+    color: '#fff',
+    marginBottom: 16,
+  },
+  actionsGrid: {
+    flexDirection: 'row',
+    flexWrap: 'wrap',
+    gap: 12,
+  },
+  actionCard: {
+    width: '47%',
+    backgroundColor: '#1C1C1E',
+    borderRadius: 12,
+    padding: 20,
+    marginBottom: 12,
+  },
+  actionIcon: {
+    fontSize: 32,
+    marginBottom: 12,
+  },
+  actionTitle: {
+    fontSize: 16,
+    fontWeight: 'bold',
+    color: '#fff',
+    marginBottom: 4,
+  },
+  actionDescription: {
+    fontSize: 14,
+    color: '#999',
+  },
+})