Tasks completed: 3/3
- Add SelectedModel type and update NanoBananaNodeData
- Create GenerateImageNode with provider/model selector
- Update store and canvas references
SUMMARY: .planning/phases/03-generate-node-refactor/03-01-SUMMARY.md
- Rename target from Generate to GenerateImage
- Filter model selector to image capabilities only (text-to-image, image-to-image)
- Note GenerateVideo node deferred to Phase 6