Plan task P1.6. Modal hold-creation form: reason picker, qty split, optional photo (camera input on mobile), description, mark-for-scrap toggle. Calls /fp/workspace/hold (added in P1.9). Reason list kept client-side, keep in sync with fusion.plating.quality.hold.hold_reason. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>