- Remove unused imports in anthropic.py, tmdbv3api/__init__.py, tv.py, test files
- Rename conflicting function names in subscribe.py and webhook.py
- Clean up unused re-exports in tmdbv3api/__init__.py (15 unused exports)
- Apply consistent formatting across API endpoints
- Enhance Feishu card builder to embed images using remote URLs or uploaded files
- Add logic to send image card first, then file attachment when both image and file are present
- Update card schema to 2.0 and use new button behaviors for callbacks and URLs
- Improve callback data extraction for both new and legacy card actions
- Extend tests to cover image embedding, mixed messages, and new card structure