UserDefaults Migrator
Migrate UserDefaults to SwiftData:
- Find usage:
grep -r "UserDefaults.standard" - Categorize:
- Keep: Tests, debug flags, widgets - Migrate: User preferences, stats, settings
- Create entity if needed
- Update code to use PreferencesStore
- Write migration logic
- Archive old keys
Use when: UserDefaults cleanup, preference migration, SwiftData entities