- Added brush color variant and variant amount settings to the brush panel.
- Introduced a checkbox for color variant and a slider for variant amount in the brush settings.
- Implemented "Paste as New Layer" functionality, allowing users to paste clipboard images directly onto a new layer.
- Updated menus to include the new paste option with a shortcut.
- Improved layer panel iconography by replacing text buttons with SVG icons for visibility and lock toggles.
- Created new SVG assets for closed eye and watercolor icons.
- Enhanced history panel to provide richer descriptions for brush strokes and vector shape modifications.
- Fixed the issue where the first brush stroke was missing from the history panel.
- Add `persistence.rs` for stable serialization of dock layouts without runtime identifiers.
- Introduce `preview.rs` for geometry handling of dock drop previews.
- Create `sizing.rs` to manage content-aware sizing policies and constraint solving for dock panels.
- Implement `welcome.rs` to provide a welcome surface when no documents are open, featuring New and Open actions.
- Changed default VISION_BACKEND from CPU to GPU for better performance.
- Made `map_brush_style` public to allow external access.
- Updated `Engine` struct to use pooled buffers for stroke snapshots, reducing memory allocations during brush strokes.
- Introduced `CompositeSnapshot` for efficient background compositing without blocking the UI thread.
- Implemented `SendPtr` for safe raw pointer handling across threads.
- Enhanced `commit_pending_history` to recycle buffers and improve performance.
- Fixed cursor preview issues for procedural brushes by removing unnecessary preset synchronization.
- Added tests and documentation for new features and performance improvements.
- Removed obsolete plans for stroke tuning, commit regression gate, and wxPlainSlider port.
- Updated scrollable panel functionality to include optional scrollbar visibility.
- Enhanced brush panel to filter brush styles by category for improved user experience.
- Adjusted canvas rendering logic to prevent UI freezes during active drawing.
- Modified stroke brush logic to allow single dab drawing at the current position when no movement occurs.
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