Integrates ByteDance's Seedance v2.0 into Video Studio with support for
aspect ratios (16:9, 9:16, 4:3, 3:4), durations (5/10/15s), and quality
(basic/high). Updates README to reflect the new model.
- Add nano-banana-2 and seedream-5.0 to t2i models
- Add nano-banana-2-edit and seedream-5.0-edit to i2i models
- Add maxImages to 22 i2i models based on schema maxItems (up to 14 for nano-banana-2-edit)
- UploadPicker: multi-select mode with order badges, batch file upload, count/+ trigger badge
- ImageStudio: track uploadedImageUrls[], setMaxImages() on model switch, pass images_list to API
- muapi: pass quality and images_list array params in generateImage/generateI2I
- Expose quality/resolution controls for t2i models (nano-banana-2, seedream-5.0)
- Update README with new models, multi-image picker docs, and comparison table
