New features:
- Video Cutter with timeline UI, preview, and frame extraction
- Video Merge functionality to combine multiple videos
- Part-based VOD downloads (split long VODs into segments)
- Download progress with speed and ETA display
- New navigation tabs for Cutter and Merge
Technical changes:
- Added FFmpeg/FFprobe integration for video processing
- New IPC handlers for video operations
- Extended preload API with cutter/merge methods
- Progress event listeners for cut/merge operations
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
