- Created dedicated utility functions for API route proxies (buildApiUrl, extractHeaders, handleApiError)
- Migrated all 20 API route handlers to use new utilities instead of api/core
- Routes continue to act as proxies to Rails API (correct architecture)
- Removed dependency on buildUrl from api/core in all route handlers
- Updated migration plan to reflect completed Phase 3
- Created new UserAdapter for user profile and favorites operations
- Updated routes/teams/explore and routes/[username] to use adapters directly
- Deleted resource facade files (parties.ts, grid.ts, users.ts)
- All services and initial routes now use adapters without backward compatibility
- Updated migration plan to track completed work
- Remove non-existent batch update methods for grid items
- Add gridUpdate for atomic batch operations
- Add preview management methods
- Split job management into separate endpoints
- Update tests to match new API structure
