- Implement PDF and PDF thumbnail generation with incremental loading
- Add UI refresh mechanism (tick counter + RefreshView message)
- Improve fl! macro with named parameters
- Clean up code organization (mod.rs: wiring, model.rs: state only)
Add ability to set current image as desktop wallpaper with keyboard
shortcut 'W' and icon button in Properties panel.
Supports COSMIC, GNOME, KDE, XFCE, and tiling window managers via
automatic detection and fallback mechanism.
Implementation uses wallpaper crate with custom COSMIC config file
integration and gsettings/feh fallbacks.
- Mark all zoom and pan controls as fully working
- Remove status column (all shortcuts are implemented)
- Add detailed descriptions for each feature
- Include mouse controls and toolbar usage
- Add tips for keyboard-driven workflow
- Document bidirectional control synchronization
- Remove or mark planned features accurately
