Add critical guidelines for deriving player state from MPV rather
than maintaining duplicate state. Documents the single source of
truth pattern to prevent state synchronization bugs.
- Replace implementation plan with feature documentation
- Document all keybindings
- Add technical details about MPV IPC
- List UI layout structure
- Mark all phases as complete
- Add Cargo project with TUI and async dependencies
- Implement cache-only architecture for low bandwidth operation
- Add file scanner with media type detection
- Create two-panel TUI layout (file tree and status)
- Add config file support for scan path management
- Implement XDG-compliant cache and config directories
- Add Gitea CI/CD workflow for automated releases
