- Add 31 tests for WorkflowCanvas covering:
- Basic rendering (ReactFlow, Background, Controls, MiniMap)
- Welcome modal visibility based on canvas state
- Node and edge type registration
- Drag and drop for nodes, images, and workflows
- Keyboard shortcuts (Ctrl+Enter, Ctrl+C, Shift+key node creation)
- Canvas configuration (zoom, delete keys, multi-selection)
- Group handling support
- Add ResizeObserver and DOMMatrixReadOnly mocks to test setup for React Flow
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>