patches: pre-upstream review fixes (all blockers + nits)

- 0000: fix double blank line before #ifdef, remove extra block scope braces
- 0001: spell out 'AT' -> 'assistive technology'; fix stub comment
- 0002: revert unrelated em-dash->triple-dash in windowWillResize strings
- 0003-0005: renumber from [PATCH N/9] to [PATCH N/8]
- 0006: remove 'Block-style cursors' from Known Limitations; fix @xref note
- 0007: remove spurious ns_ax_face_is_selected ChangeLog entry
- 0008: refactor goto skip_overlay_scan to nested if; remove spurious blank line
- All: renumber series (0000=[PATCH 1/1], 0001-0008=[PATCH 1/8]-[PATCH 8/8])

patches/0007-ns-announce-overlay-completions-to-VoiceOver.patch

@@ -1,14 +1,12 @@
 From b6bc1d102334e32dbc3e284d9e65b0f304c3e694 Mon Sep 17 00:00:00 2001
 From: Martin Sukany <martin@sukany.cz>
 Date: Wed, 4 Mar 2026 15:23:56 +0100
-Subject: [PATCH 8/9] ns: announce overlay completions to VoiceOver
+Subject: [PATCH 7/8] ns: announce overlay completions to VoiceOver
 
 Completion frameworks such as Vertico, Ivy, and Icomplete render
 candidates via overlay before-string/after-string properties.  Without
 this change VoiceOver cannot read overlay-based completion UIs.
 
-* src/nsterm.m (ns_ax_face_is_selected): New static function; matches
-'current', 'selected', 'selection' in face symbol names.
 (ns_ax_selected_overlay_text): New function; scan overlay strings in
 the window for a line with a selected face; return its text.
 (ensureTextCache): Switch cache-validity counter from BUF_CHARS_MODIFF