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/media.tsx

@@ -0,0 +1,201 @@
+import { useState } from 'react'
+import {
+  View,
+  Text,
+  ScrollView,
+  TouchableOpacity,
+  StyleSheet,
+  ActivityIndicator,
+  Alert,
+} from 'react-native'
+import { useRouter } from 'expo-router'
+import { supabase } from '../../src/shared/supabase'
+
+export default function AdminMediaScreen() {
+  const router = useRouter()
+  const [uploading, setUploading] = useState(false)
+  const [activeTab, setActiveTab] = useState<'videos' | 'thumbnails' | 'avatars'>('videos')
+
+  const handleUpload = async () => {
+    Alert.alert('Info', 'File upload requires file picker integration. This is a placeholder.')
+  }
+
+  const handleDelete = async (path: string) => {
+    Alert.alert(
+      'Delete File',
+      `Are you sure you want to delete "${path}"?`,
+      [
+        { text: 'Cancel', style: 'cancel' },
+        { 
+          text: 'Delete', 
+          style: 'destructive',
+          onPress: async () => {
+            try {
+              const { error } = await supabase.storage
+                .from(activeTab)
+                .remove([path])
+              
+              if (error) throw error
+              Alert.alert('Success', 'File deleted')
+            } catch (err) {
+              Alert.alert('Error', err instanceof Error ? err.message : 'Failed to delete')
+            }
+          }
+        },
+      ]
+    )
+  }
+
+  return (
+    <View style={styles.container}>
+      <View style={styles.header}>
+        <TouchableOpacity onPress={() => router.back()} style={styles.backButton}>
+          <Text style={styles.backText}>← Back</Text>
+        </TouchableOpacity>
+        <Text style={styles.title}>Media Library</Text>
+        <TouchableOpacity style={styles.uploadButton} onPress={handleUpload}>
+          <Text style={styles.uploadButtonText}>Upload</Text>
+        </TouchableOpacity>
+      </View>
+
+      <View style={styles.tabs}>
+        {(['videos', 'thumbnails', 'avatars'] as const).map((tab) => (
+          <TouchableOpacity
+            key={tab}
+            style={[styles.tab, activeTab === tab && styles.activeTab]}
+            onPress={() => setActiveTab(tab)}
+          >
+            <Text style={[styles.tabText, activeTab === tab && styles.activeTabText]}>
+              {tab.charAt(0).toUpperCase() + tab.slice(1)}
+            </Text>
+          </TouchableOpacity>
+        ))}
+      </View>
+
+      <ScrollView style={styles.content}>
+        <View style={styles.infoCard}>
+          <Text style={styles.infoTitle}>Storage Buckets</Text>
+          <Text style={styles.infoText}>
+            • videos - Workout videos (MP4, MOV){'\n'}
+            • thumbnails - Workout thumbnails (JPG, PNG){'\n'}
+            • avatars - Trainer avatars (JPG, PNG)
+          </Text>
+        </View>
+
+        <View style={styles.placeholderCard}>
+          <Text style={styles.placeholderIcon}>🎬</Text>
+          <Text style={styles.placeholderTitle}>Media Management</Text>
+          <Text style={styles.placeholderText}>
+            Upload and manage media files for workouts and trainers.{'\n\n'}
+            This feature requires file picker integration.{'\n'}
+            Files will be stored in Supabase Storage.
+          </Text>
+        </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',
+  },
+  backButton: {
+    padding: 8,
+  },
+  backText: {
+    color: '#FF6B35',
+    fontSize: 16,
+  },
+  title: {
+    fontSize: 20,
+    fontWeight: 'bold',
+    color: '#fff',
+  },
+  uploadButton: {
+    backgroundColor: '#FF6B35',
+    paddingHorizontal: 16,
+    paddingVertical: 8,
+    borderRadius: 8,
+  },
+  uploadButtonText: {
+    color: '#000',
+    fontWeight: 'bold',
+  },
+  tabs: {
+    flexDirection: 'row',
+    padding: 16,
+    gap: 8,
+  },
+  tab: {
+    flex: 1,
+    paddingVertical: 12,
+    paddingHorizontal: 16,
+    borderRadius: 8,
+    backgroundColor: '#1C1C1E',
+    alignItems: 'center',
+  },
+  activeTab: {
+    backgroundColor: '#FF6B35',
+  },
+  tabText: {
+    color: '#999',
+    fontWeight: '600',
+  },
+  activeTabText: {
+    color: '#000',
+  },
+  content: {
+    flex: 1,
+    padding: 16,
+  },
+  infoCard: {
+    backgroundColor: '#1C1C1E',
+    borderRadius: 12,
+    padding: 16,
+    marginBottom: 16,
+  },
+  infoTitle: {
+    fontSize: 16,
+    fontWeight: 'bold',
+    color: '#fff',
+    marginBottom: 8,
+  },
+  infoText: {
+    fontSize: 14,
+    color: '#999',
+    lineHeight: 20,
+  },
+  placeholderCard: {
+    backgroundColor: '#1C1C1E',
+    borderRadius: 12,
+    padding: 32,
+    alignItems: 'center',
+  },
+  placeholderIcon: {
+    fontSize: 48,
+    marginBottom: 16,
+  },
+  placeholderTitle: {
+    fontSize: 18,
+    fontWeight: 'bold',
+    color: '#fff',
+    marginBottom: 8,
+  },
+  placeholderText: {
+    fontSize: 14,
+    color: '#999',
+    textAlign: 'center',
+    lineHeight: 20,
+  },
+})