Sebastian Krüger 4ddb8fe0e3 feat(phase-13): implement layer masks foundation for non-destructive editing ...

Add comprehensive layer mask system with core functionality for non-destructive editing.

Features:
- LayerMask interface with canvas, enabled, and inverted properties
- Layer interface updated with mask property
- Full mask management in layer store:
  * addMask() - Creates white mask (fully visible)
  * removeMask() - Removes mask from layer
  * toggleMask() - Enable/disable mask
  * invertMask() - Invert mask values
  * applyMask() - Apply mask to layer and remove
- Duplicate layer now clones masks
- Grayscale mask system (white=reveal, black=hide)

Changes:
- Updated types/layer.ts with LayerMask interface
- Modified Layer interface to include mask property
- Updated store/layer-store.ts:
  * Added mask property initialization to createLayer
  * Added 5 new mask management functions
  * Updated duplicateLayer to clone masks

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-21 19:57:49 +01:00

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