- Add StravaManager with OAuth login, TCX generation, and upload via Strava API (client ID/secret are placeholders) - Add Strava connect/upload/disconnect UI to workout edit view - Copy HKWorkoutActivity objects during trim so Apple Fitness can display splits - Expand authorization and migrated sample types (running dynamics, effort scores, basal energy, step count, VO2 max) - Fetch effort scores by time range and relate via special iOS 18 API - Document all HealthKit and Strava platform limitations in README