Daneel 65c799dc3f patches: review fixes — specpdl protection, overlay_modiff tracking, binary search, enum cleanup ...

M1: accessibilityRangeForPosition uses specpdl unwind protection for
    block_input/unblock_input (consistent with all other methods).
M2: Track BUF_OVERLAY_MODIFF in ensureTextCache — overlay-only changes
    (timer-based completion highlight) now invalidate the text cache.
M3: Detect narrowing/widening by comparing cachedTextStart vs BUF_BEGV.
m1: Binary search (O(log n)) for visible runs in both
    accessibilityIndexForCharpos and charposForAccessibilityIndex.
m3: Add EmacsAXSpanTypeNone = -1 to enum instead of (EmacsAXSpanType)-1 cast.
m5: Add TODO comment in ns_ax_mode_line_text about non-CHAR_GLYPH limitation.
README: Remove resolved overlay_modiff limitation, document binary search
    and narrowing detection, update architecture section.

2026-02-27 16:56:05 +01:00

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