Implemented comprehensive multi-file audio import system:
- Created ImportTrackDialog component with drag-and-drop and file browser support
- Updated TrackList to integrate import functionality with dedicated buttons
- Added multi-track-demo page to test and demonstrate import features
- Sequential file processing with automatic track naming from filenames
- Error handling for non-audio files
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
