Adds right-click context menu for canvas with full operation support:
**Clipboard Operations:**
- Cut/Copy/Paste with selection mask support
- Browser clipboard API integration for external images
- Internal clipboard buffer for canvas selections
- Toast notifications for user feedback
**Selection Operations:**
- Select All - creates full canvas selection with proper mask
- Deselect - clears active selection
- Selection state properly integrated with canvas operations
**Layer Operations:**
- New Layer - creates layer with history support
- Duplicate Layer - clones active layer
- Merge Down - merges layer with one below
**Transform Operations:**
- Rotate 90° CW - rotates active layer clockwise
- Flip Horizontal - mirrors layer horizontally
- Flip Vertical - mirrors layer vertically
- All transforms preserve image quality and support undo/redo
**Edit Operations:**
- Undo/Redo - integrated with history system
- Disabled states for unavailable operations
- Context-aware menu items
**New Files Created:**
- lib/clipboard-operations.ts - Cut/copy/paste implementation
- lib/canvas-operations.ts - Rotate/flip canvas functions
**Modified Files:**
- components/canvas/canvas-with-tools.tsx - Context menu integration
- store/selection-store.ts - Added selectAll() method
- core/commands/index.ts - Export all command types
**Technical Improvements:**
- Proper Selection type structure with mask/bounds
- History command integration for all operations
- Lazy-loaded operations for performance
- Toast feedback for all user actions
- Full TypeScript type safety
All operations work with undo/redo and maintain app state consistency.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Sebastian Krüger
63a6801155