- Add Inverse selection (Shift+Ctrl+I) with engine.invert_selection()
- Add Shrink, Feather, Border, Smooth menu items with parameter dialogs
- Implement selection_border() and selection_smooth() in engine API
- Implement border_mask() and smooth_mask() in hcie-selection crate
- Update SelectionOpApply handler for all selection operations
- Implemented contour lookup functionality for Bevel & Emboss effect to allow for custom contour curves.
- Added contour parameter to LayerStyle and updated related structures and functions.
- Improved emboss algorithm by fixing height field calculations and ensuring proper handling of outside pixels.
- Introduced tilt component for 3D emboss effect, enhancing visual depth.
- Optimized MAE grid search parameters for better performance and accuracy.
- Expanded Iced GUI panel for Bevel & Emboss to include contour selection and additional styling options.
- Updated example scripts to reflect changes in the API and new features.
- 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.
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