New screens:
- Category detail (workout/category/[id]): filtered workout list
with SwiftUI segmented Picker for level sub-filter
- Collection detail (collection/[id]): hero header with gradient,
stats (workouts/minutes/calories), numbered workout list
Root layout:
- Inter font loading (400-900 weights) via @expo-google-fonts
- SplashScreen integration for font loading gate
- Route config for all screens with appropriate animations
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Workout detail (workout/[id]):
- Dynamic data via useLocalSearchParams + getWorkoutById
- VideoPlayer hero with trainer color gradient fallback
- Exercise list, equipment, music vibe, "Start Workout" CTA
Player (player/[id]):
- useTimer hook drives phase transitions (PREP/WORK/REST/COMPLETE)
- useHaptics for phase changes and countdown ticks
- useAudio for sound effects (beeps, dings, completion chime)
- Real calorie tracking, progress ring, exercise display
- Saves WorkoutResult to activityStore on completion
Complete (complete/[id]):
- Reads real stats from activityStore history
- Burn bar, streak counter, calories/duration/completion stats
- Recommended workouts, share via expo-sharing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
