patches: apply all maintainer review fixes (review pass 2)

All 9 patches now apply cleanly with git am on Linux (git 2.43.0).
Root cause of previous failures: hunk offsets were systematically wrong
by 7-40 lines; macOS git fuzzy-matched them, Linux did not.
Patches regenerated via git format-patch after applying all changes.

Fixes applied:
- P0000: unbind_to on no-candidate fall-through path; hunk regenerated
- P0001: block_input + record_unwind_protect_void in ns_ax_buffer_text
- P0003: [trims release] MRC memory leak; block_input already present
- P0004: mojibake comment (--- not UTF-8 em-dash)
- P0006: texinfo dangling semicolons -> periods in GNUstep paragraph
- P0007: em-dash fixes removed (content was already --- from P0004/P0005)
- P0008: childFrameLastBuffer -> BVAR(b,name) for GC safety;
  BUF_OVERLAY_MODIFF removed from ensureTextCache (hl-line-mode O(N)
  rebuild regression); block_input in ns_ax_buffer_text (P0001 scope);
  voiceoverSetPoint and childFrameLastBuffer explicit init in
  initFrameFromEmacs:; cachedOverlayModiffForText ivar removed

patches/0006-doc-add-VoiceOver-accessibility-section-to-macOS-app.patch

@@ -1,7 +1,7 @@
-From cd2037fc2078f3db365fa3f222413d9022c882f5 Mon Sep 17 00:00:00 2001
+From 8bc94f26137898cb050f176c244caa3d3a1c5946 Mon Sep 17 00:00:00 2001
 From: Martin Sukany <martin@sukany.cz>
 Date: Sat, 28 Feb 2026 12:58:11 +0100
-Subject: [PATCH 6/8] doc: add VoiceOver accessibility section to macOS
+Subject: [PATCH 7/9] doc: add VoiceOver accessibility section to macOS
  appendix
 
 * doc/emacs/macos.texi (VoiceOver Accessibility): New node between
@@ -16,7 +16,7 @@ default: initial value is nil, set automatically at startup.
  2 files changed, 83 insertions(+), 3 deletions(-)
 
 diff --git a/doc/emacs/macos.texi b/doc/emacs/macos.texi
-index 6bd334f..6514dfc 100644
+index 6bd334f48e..8d4a7825d8 100644
 --- a/doc/emacs/macos.texi
 +++ b/doc/emacs/macos.texi
 @@ -36,6 +36,7 @@ Support}), but we hope to improve it in the future.
@@ -99,8 +99,8 @@ index 6bd334f..6514dfc 100644
 +left-to-right glyph layout.
 +@end itemize
 +
-+  This support is available only on the Cocoa build; GNUstep has a
-+different accessibility model and is not yet supported;
++  This support is available only on the Cocoa build.  GNUstep has a
++different accessibility model and is not yet supported.
 +Block-style cursors are handled
 +correctly: character navigation announces the character at the cursor
 +position, not the character before it.
@@ -110,10 +110,10 @@ index 6bd334f..6514dfc 100644
  @section GNUstep Support
  
 diff --git a/src/nsterm.m b/src/nsterm.m
-index 7574da4..426b029 100644
+index 231ae95a17..062066d4e5 100644
 --- a/src/nsterm.m
 +++ b/src/nsterm.m
-@@ -14623,9 +14623,13 @@ Nil means use fullscreen the old (< 10.7) way.  The old way works better with
+@@ -14657,9 +14657,13 @@ Nil means use fullscreen the old (< 10.7) way.  The old way works better with
  
    DEFVAR_BOOL ("ns-accessibility-enabled", ns_accessibility_enabled,
       doc: /* Non-nil enables Zoom cursor tracking and VoiceOver support.