SplitGridNode tests (23):
- Basic rendering with title, input/output handles
- Grid configuration display (rows x cols)
- Empty state and unconfigured warning
- Source image display with grid overlay
- Settings modal open/close and auto-open behavior
- Split button functionality and disabled states
- Child node count display
- Loading and error states
- Custom title editing
GroupNode tests (28):
- Basic rendering with group name and color
- Color picker button and delete button
- Group name editing (Enter, Escape, blur)
- Color picker open/close and color selection
- Delete group functionality
- Node resizer visibility based on selection
- Header drag functionality
- All 6 group colors (neutral, blue, green, purple, orange, red)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>