- Fix line range 38→36 for _frozen_path extraction
- Clarify line ranges for ffmpeg vs annotation functions
- Remove unused imports (_frozen_path, build_annotation_json_path) from main.py import list
- Add step to clean up dead stdlib imports (re, json, sqlite3, tempfile, datetime)
- Add explicit stub router code for stream, markers, export, hidden
- Add server/__init__.py and server/routes/__init__.py content
- Add _DBWorker and FrameGrabber to "keep in main.py" list
- Note optional tracking deps in Dockerfile
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>