- Fixed API_URL in WordDetailModal.tsx to use explicit undefined check
- This completes the Docker deployment fix for all frontend components
- Word info modal now works correctly in Docker via nginx proxy
- All 4 locations now use consistent environment-aware URL pattern:
* api.ts (API client)
* videoPlaylist.ts (video URLs)
* VideoUpload.tsx (admin video upload)
* WordDetailModal.tsx (word info modal)
Fixes: Word info click feature in Docker deployment
Co-Authored-By: Auggie