patches: fix all compile errors and review issues

- ZV_S -> BUF_ZV (undefined macro)
- cf->current_buffer -> XWINDOW(cf->selected_window)->contents
  (current_buffer is a thread macro, can't use as field name)
- find_newline: add record_unwind_current_buffer + set_buffer_internal_1
- ns_zoom_track_completion: add specpdl unwind protection
- ns_zoom_face_is_selected: replace with forward decl of ns_ax_face_is_selected
  (eliminates duplicate)
- childFrameLastBuffer: struct buffer * -> Lisp_Object (safe vs kill-buffer)
- EmacsView dealloc: xfree childFrameLastCandidate (memory leak)
- postCompletionAnnouncementForBuffer: add block_input/unblock_input

patches/0008-ns-announce-child-frame-completion-candidates-for-Vo.patch

@@ -1,4 +1,4 @@
-From 62e619d508d4ce3b3bf0f8dd959041bcd9a75350 Mon Sep 17 00:00:00 2001
+From ca488b10323f136b3ce2593b56e72e222bdae7d6 Mon Sep 17 00:00:00 2001
 From: Martin Sukany <martin@sukany.cz>
 Date: Sat, 28 Feb 2026 16:01:29 +0100
 Subject: [PATCH 9/9] ns: announce child frame completion candidates for
@@ -43,8 +43,8 @@ refocus parent buffer element when child frame closes.
  doc/emacs/macos.texi |   6 --
  etc/NEWS             |   4 +-
  src/nsterm.h         |   5 +
- src/nsterm.m         | 227 ++++++++++++++++++++++++++++++++++++++++++-
- 4 files changed, 233 insertions(+), 9 deletions(-)
+ src/nsterm.m         | 236 ++++++++++++++++++++++++++++++++++++++++++-
+ 4 files changed, 242 insertions(+), 9 deletions(-)
 
 diff --git a/doc/emacs/macos.texi b/doc/emacs/macos.texi
 index 4825cf9..97777e2 100644
@@ -86,7 +86,7 @@ index 2b1f9e6..8a40850 100644
  for the *Completions* buffer.  The implementation uses a virtual
  accessibility tree with per-window elements, hybrid SelectedTextChanged
 diff --git a/src/nsterm.h b/src/nsterm.h
-index 2102fb9..2fc4de4 100644
+index 2102fb9..dd98d56 100644
 --- a/src/nsterm.h
 +++ b/src/nsterm.h
 @@ -594,6 +594,10 @@ typedef NS_ENUM (NSInteger, EmacsAXSpanType)
@@ -95,7 +95,7 @@ index 2102fb9..2fc4de4 100644
    BOOL accessibilityUpdating;
 +  BOOL childFrameCompletionActive;
 +  char *childFrameLastCandidate;
-+  struct buffer *childFrameLastBuffer;
++  Lisp_Object childFrameLastBuffer;
 +  EMACS_INT childFrameLastModiff;
  #endif
    BOOL font_panel_active;
@@ -109,10 +109,10 @@ index 2102fb9..2fc4de4 100644
  @end
  
 diff --git a/src/nsterm.m b/src/nsterm.m
-index b9b2a80..dc49417 100644
+index b3bdd42..9f37c4e 100644
 --- a/src/nsterm.m
 +++ b/src/nsterm.m
-@@ -7296,6 +7296,112 @@ visual line index for Zoom (skip whitespace-only lines
+@@ -7291,6 +7291,112 @@ visual line index for Zoom (skip whitespace-only lines
  
    return nil;
  }
@@ -225,7 +225,34 @@ index b9b2a80..dc49417 100644
  /* Build accessibility text for window W, skipping invisible text.
     Populates *OUT_START with the buffer start charpos.
     Populates *OUT_RUNS with an array of visible runs and *OUT_NRUNS
-@@ -12535,6 +12641,77 @@ - (id)accessibilityFocusedUIElement
+@@ -9028,6 +9134,7 @@ - (void)postCompletionAnnouncementForBuffer:(struct buffer *)b
+   ptrdiff_t currentOverlayStart = 0;
+   ptrdiff_t currentOverlayEnd = 0;
+ 
++  block_input ();
+   specpdl_ref count2 = SPECPDL_INDEX ();
+   record_unwind_current_buffer ();
+   if (b != current_buffer)
+@@ -9186,6 +9293,7 @@ - (void)postCompletionAnnouncementForBuffer:(struct buffer *)b
+       self.cachedCompletionOverlayEnd = 0;
+       self.cachedCompletionPoint = 0;
+     }
++  unblock_input ();
+ }
+ 
+ /* ---- Notification dispatch (main entry point) ---- */
+@@ -9773,6 +9881,10 @@ - (void)dealloc
+ #endif
+ 
+   [accessibilityElements release];
++#ifdef NS_IMPL_COCOA
++  if (childFrameLastCandidate)
++    xfree (childFrameLastCandidate);
++#endif
+   [[self menu] release];
+   [super dealloc];
+ }
+@@ -12533,6 +12645,80 @@ - (id)accessibilityFocusedUIElement
     The existing elements carry cached state (modiff, point) from the
     previous redisplay cycle.  Rebuilding first would create fresh
     elements with current values, making change detection impossible.  */
@@ -251,9 +278,12 @@ index b9b2a80..dc49417 100644
 +     also guards against re-entrance: if Lisp calls below
 +     trigger redisplay, the modiff check short-circuits.  */
 +  EMACS_INT modiff = BUF_MODIFF (b);
-+  if (b == childFrameLastBuffer && modiff == childFrameLastModiff)
++  if (!BUFFER_LIVE_P (b))
 +    return;
-+  childFrameLastBuffer = b;
++  if (EQ (childFrameLastBuffer, make_lisp_ptr (b, Lisp_Vectorlike))
++      && modiff == childFrameLastModiff)
++    return;
++  childFrameLastBuffer = make_lisp_ptr (b, Lisp_Vectorlike);
 +  childFrameLastModiff = modiff;
 +
 +  /* Skip buffers larger than a typical completion popup.
@@ -303,7 +333,7 @@ index b9b2a80..dc49417 100644
  - (void)postAccessibilityUpdates
  {
    NSTRACE ("[EmacsView postAccessibilityUpdates]");
-@@ -12545,11 +12722,59 @@ - (void)postAccessibilityUpdates
+@@ -12543,11 +12729,59 @@ - (void)postAccessibilityUpdates
  
    /* Re-entrance guard: VoiceOver callbacks during notification posting
       can trigger redisplay, which calls ns_update_end, which calls us