Daneel f961f46b9a v15.4: comprehensive VoiceOver fix — 9 bugs from 4-reviewer audit ...

P0 fixes (critical):
- accessibilityRangeForLine: include trailing newline — fixes
  zero-length ranges for empty lines causing 'end of text'
- accessibilityVisibleCharacterRange: return full buffer range —
  VoiceOver was treating visible window boundary as end of text
- ensureTextCache: invalidate when point moves outside cached region
  (stale cachedTextStart after scrolling without editing)
- ns_ax_frame_for_range: use row->height not visible_height, clip
  to text area — fixes VoiceOver cursor bleeding into adjacent lines

P1 fixes (important):
- Post SelectedTextChanged after FocusedUIElementChanged on focus
  acquisition (windowDidBecomeKey) and window switch (C-x o)
- Post LayoutChangedNotification after tree rebuild
- accessibilityRangeForIndex: rangeOfComposedCharacterSequenceAtIndex
  for emoji/combining marks
- Buffer accessibilityFrame excludes mode line height
- New elements init cachedPoint/cachedModiff=-1 to force first
  notification

Reviewed by: architect + 3 reviewers (text, notifications, frames)

2026-02-26 14:53:47 +01:00

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