- New /plan page shows all phases in order with current phase highlighted
- Add GET/POST/PUT /api/agent/phases endpoints for the AI coach
- Plan link added to navigation bar
- Agent config updated with phase management instructions
- Merge opencode-serve into the web container via entrypoint script
- Add /api/agent/* JSON endpoints for workouts, sets, checkins
- Rewrite fitness-trainer.md to use API instead of markdown files
- Pass recent workouts and check-ins as chat context to the coach
- Show current training phase on dashboard
- Clarify check-ins as morning check-ins (calories/steps = yesterday)
- Add NixOS deployment section to README
- Make all check-in fields explicitly optional in UI
