test: add QA coverage — access unit tests, VideoPlayer snapshots, Maestro E2E flows, testIDs

- Add testIDs to explore, workout detail, and collection detail screens
- Add testID prop to VideoPlayer component
- Create access service unit tests (isFreeWorkout, canAccessWorkout)
- Create VideoPlayer rendering snapshot tests (preview/background modes)
- Create Maestro E2E flows: explore-freemium, collection-detail
- Update tab-navigation flow with Explore screen assertions
- Update profile-settings flow with real activity stat assertions
- Update all-tests suite to include new flows

app/workout/[id].tsx

@@ -90,7 +90,7 @@ export default function WorkoutDetailScreen() {
   const repeatCount = Math.max(1, Math.floor(workout.rounds / workout.exercises.length))
 
   return (
-    <View style={styles.container}>
+    <View testID="workout-detail-screen" style={styles.container}>
       {/* Header with SwiftUI glass button */}
       <View style={[styles.header, { paddingTop: insets.top + SPACING[3] }]}>
         <RNText style={styles.headerTitle} numberOfLines={1}>
@@ -131,6 +131,7 @@ export default function WorkoutDetailScreen() {
           mode="preview"
           isPlaying={true}
           style={styles.videoPreview}
+          testID="workout-video-preview"
         />
         {/* Quick stats */}
         <View style={styles.quickStats}>
@@ -204,6 +205,7 @@ export default function WorkoutDetailScreen() {
       <View style={[styles.bottomBar, { paddingBottom: insets.bottom + SPACING[4] }]}>
         <BlurView intensity={80} tint="dark" style={StyleSheet.absoluteFill} />
         <Pressable
+          testID={isLocked ? 'workout-unlock-button' : 'workout-start-button'}
           style={({ pressed }) => [
             styles.startButton,
             isLocked && styles.lockedButton,
@@ -214,7 +216,7 @@ export default function WorkoutDetailScreen() {
           {isLocked && (
             <Ionicons name="lock-closed" size={18} color="#FFFFFF" style={{ marginRight: 8 }} />
           )}
-          <RNText style={styles.startButtonText}>
+          <RNText testID="workout-cta-text" style={styles.startButtonText}>
             {isLocked ? t('screens:workout.unlockWithPremium') : t('screens:workout.startWorkout')}
           </RNText>
         </Pressable>