Split monolithic symlink.py into modular components:
- config.py: Constants and configuration
- core/: Models, database, blender, manager
- ui/: Main window and widgets
New features included:
- Cross-dissolve transitions with multiple blend methods
- Alpha blend, Optical Flow, and RIFE (AI) interpolation
- Per-folder trim settings with start/end frame control
- Per-transition asymmetric overlap settings
- Folder type overrides (Main/Transition)
- Dual destination folders (sequence + transitions)
- WebP lossless output with compression method setting
- Video and image sequence preview with zoom/pan
- Session resume from destination folder
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
