New patch 0009 fixes HIGH severity issues from Opus review:
- Announcement coalescing (50ms debounce)
- cachedText retain+autorelease in accessibilityValue
- EmacsView dealloc: nil out emacsView on all AX elements
- Nil guards on protocol methods + overlayZoomActive
0007 updated: revert accidental em-dash→triple-dash, add overlayZoomActive nil guards
0008 updated: specpdl exception safety for accessibilityUpdating, lastChildFrameBuffer staticpro
Series now 9 patches total (0001-0006 unchanged, 0007-0009 new/updated).
