v1.19.17: Menu dismissal (intermediate)

Immutable intermediate, superseded by verified v1.19.19.

Source a3bce50251d039bf13bf309a8b15e3491c8bddae; native amd64/arm64 gates passed. Its actual-image 65-case suite passed in 8.8 minutes. Added held-template regression then found late native controls missing. Query navigation separately exposed duplicate app/control IDs; these gaps are fixed in v1.19.19. Published tags were not moved.

Final handoff and preserved earlier evidence. Production69/shared85 were never accessed or updated by this thread.