Why: Keep the new OOXML registration gate and task record while retaining U3 fixes. Evidence: Backend merged main 607c38d cleanly; full Go vet/test and selected zero-paid live-tag tests passed at d39e77c. Impact: Updates the Backend gitlink and unrelated main task metadata; browser and composed checks follow. Refs: U3 r0.5 implementation plan Task 5
ui
@ ac5b617e9e