Excluded blendedImageCache and blendedImageDirty properties from layer serialization in CanvasState.ts to prevent DataCloneError when saving state. This ensures that only serializable data is sent to Web Workers, while runtime caches are regenerated as needed. Blend area performance optimization remains functional without serialization issues.
Refactored notification utilities for a more modern, reusable notification system and added info/success/error notifications to the background removal (matting) workflow. Removed the custom error dialog in favor of notifications, and exposed all notification types for debugging. Updated imports and cleaned up notification-related code.
Adds a modern, type-based notification UI with support for success, error, info, warning, and alert styles, including a new showAlertNotification function. CanvasState now auto-corrects the node_id widget before saving state and notifies the user if a correction occurs. CanvasView centering logic now uses the actual canvas container for more accurate viewport adjustments.
Adds logic to restore outputAreaBounds from saved state if available, or fallback to a default for legacy saves. Also ensures outputAreaBounds is included when saving state, improving consistency across sessions.
Moved layer drawing logic into CanvasLayers._drawLayer and _drawLayers methods, replacing repeated rendering code in CanvasIO and CanvasLayers. This improves maintainability and ensures consistent handling of layer properties such as blend mode, opacity, rotation, and flipping. Also, fixed layer serialization to only generate imageId when missing, and ensured new layers have flipH/flipV set when created from matted images.
