patches: fix all round-1 blockers (B1 B3 B5 B6)

B1 (0007): Fix dangling comment - change context line to deletion so
the opening comment of the removed ns_ax_face_is_selected function
is properly deleted, not left as an unclosed comment fragment that
would cause a compilation failure.

B3 (0002): Fix block_input/record_unwind_protect_void ordering in
two places in accessibilityRangeForPosition: and related method.
Correct order: block_input() BEFORE record_unwind_protect_void(),
so the unwind handler cannot call unblock_input without a matching
block_input even if specpdl_push fails.

B5 (0008): Replace goto skip_overlay_scan with proper if-block.
The goto skipped over ObjC variable declarations which is poor style
and would be flagged by Emacs maintainers.  Restructure as
if (MINI_WINDOW_P (w) && !didTextChange) { ... }.

B6 (0008): Fix nlines < 128 to nlines < 512 in ns_ax_selected_child_
frame_text.  Arrays line_starts[] and line_ends[] are declared with
size 512; the trailing-line guard used 128, silently dropping the
last line for buffers with 128-511 lines.

patches/0007-ns-announce-overlay-completion-candidates-for-VoiceO.patch

@@ -223,10 +223,10 @@ index e4e43dd7a3..c9fe93a57b 100644
       charposForAccessibilityIndex which handles invisible text.  */
    ptrdiff_t cp_start = charpos_start;
    ptrdiff_t cp_end = cp_start + charpos_len;
-@@ -7606,31 +7749,7 @@ already on the main queue (e.g., inside postAccessibilityUpdates
+@@ -7606,31 +7749,6 @@ already on the main queue (e.g., inside postAccessibilityUpdates
     freeing the main queue for VoiceOver's dispatch_sync calls.  */
- 
- /* Return true if FACE (a symbol or list of symbols) looks like a
+
+-/* Return true if FACE (a symbol or list of symbols) looks like a
 -   "selected item" face.  Substring match is intentionally broad ---
 -   it catches vertico-current, icomplete-selected-match,
 -   ivy-current-match, company-tooltip-selection, and similar.
@@ -251,8 +251,7 @@ index e4e43dd7a3..c9fe93a57b 100644
 -  return false;
 -}
 -
--static inline void
-+   static inline void
+ static inline void
  ns_ax_post_notification (id element,
  			  NSAccessibilityNotificationName name)
  {