## Video reference library picker
- Added "Pick from library" option to the Video Ref slot, with gallery
filtered to videos
- Added loading state to "Use selected" button in gallery modal
- Enforced seedance-2 limits (max 3 videos / 15s total) for both upload
and library flows, with a deduped video-ref-limit toast so users see a
warning on count overflow, duration overflow, or submitting when already
at max
BFlat
d51c001835