The default_unet_root setting was not being synced from backend to frontend
because it was missing from the _SYNC_KEYS tuple in misc_handlers.py. This
caused the "Default Diffusion Model Root" setting to always display "No Default"
even when a valid path was configured in settings.json.
- Add auto_organize_exclusions to settings handler proxy keys
- Refactor model file service to handle exclusions relative to model roots
- Improve auto-organize progress reporting for empty operations
- Fix exclusion pattern matching to consider relative paths within model roots
- Ensure proper validation when no model roots are configured
- Add comprehensive cleanup reporting for empty auto-organize operations
- Rename `.settings-open-location-button` to `.settings-action-link` for better semantic meaning
- Add enhanced hover/focus states with accent colors and border transitions
- Implement tabbed interface for priority tags with LoRA, checkpoint, and embedding sections
- Improve input styling with consistent error states and example code formatting
- Remove deprecated grid layout in favor of tab-based organization
- Add responsive tab navigation with proper focus management and visual feedback
