- Add api_server column to hotel_ttlock_config (migration 053)
- GET/PATCH config includes apiServer field
- issue-card passes apiServer to agent command
- Agent: WriteCardCmd.apiServer optional, all API calls use it
- TTLockPage: radio buttons EU/China with hint about 404 error
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
