feat: close v1 feature gaps — freemium gating, video/audio infrastructure, EAS build config

- Add access control service with 3 free workouts (IDs 1, 11, 43), paywall gating on workout detail and lock indicators on explore grid
- Wire VideoPlayer into player background and workout detail preview
- Add placeholder HLS video URLs to 5 sample workouts (Apple test streams)
- Add test audio URLs to music service MOCK_TRACKS for all vibes
- Switch RevenueCat API key to env-based with sandbox fallback
- Create eas.json with development/preview/production build profiles
- Update app.json with iOS privacy descriptions (HealthKit, Camera) and non-exempt encryption flag
- Create collection detail screen (route crash fix)
- Replace hardcoded profile stats with real activity store data
- Add unlockWithPremium i18n key in EN/FR/DE/ES

app/(tabs)/profile.tsx

@@ -18,7 +18,7 @@ import * as Linking from 'expo-linking'
 import Constants from 'expo-constants'
 import { useTranslation } from 'react-i18next'
 import { useMemo, useState } from 'react'
-import { useUserStore } from '@/src/shared/stores'
+import { useUserStore, useActivityStore } from '@/src/shared/stores'
 import { requestNotificationPermissions, usePurchases } from '@/src/shared/hooks'
 import { useThemeColors, BRAND } from '@/src/shared/theme'
 import type { ThemeColors } from '@/src/shared/theme/types'
@@ -78,12 +78,14 @@ export default function ProfileScreen() {
   const planLabel = isPremium ? 'TabataFit+' : t('profile.freePlan')
   const avatarInitial = profile.name?.[0]?.toUpperCase() || 'U'
 
-  // Mock stats (replace with real data from activityStore when available)
-  const stats = {
-    workouts: 47,
-    streak: 12,
-    calories: 12500,
-  }
+  // Real stats from activity store
+  const history = useActivityStore((s) => s.history)
+  const streak = useActivityStore((s) => s.streak)
+  const stats = useMemo(() => ({
+    workouts: history.length,
+    streak: streak.current,
+    calories: history.reduce((sum, r) => sum + (r.calories ?? 0), 0),
+  }), [history, streak])
 
   const handleSignOut = () => {
     updateProfile({