- Removed AI-based bounding box detection
- Implemented deterministic grid calculation (1x3, 2x2, 2x3, 3x3)
- Updated extraction prompts to request specific grid layouts and white background
- Removed color assignment logic
- Updated ExtractedAsset interface
- Updated API to stream grid splitting status instead of detection status
- Updated tests to verify new logic and mock removal of color fields
- Removed "Detect Bounding Boxes" step from ExtractionFlowDesigner UI