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/0004-ns-add-interactive-span-elements-for-Tab-navigation.patch

@@ -1,4 +1,4 @@
-From 64b373bebadd9b9c52c90da297173ea108c6e394 Mon Sep 17 00:00:00 2001
+From 5d254e28a56e023b9bf1e46cf061b9d596f49b02 Mon Sep 17 00:00:00 2001
 From: Martin Sukany <martin@sukany.cz>
 Date: Sat, 28 Feb 2026 12:58:11 +0100
 Subject: [PATCH 5/9] ns: add interactive span elements for Tab navigation
@@ -17,10 +17,10 @@ Tested on macOS 14.  Verified: Tab-cycling through org-mode links,
  1 file changed, 286 insertions(+)
 
 diff --git a/src/nsterm.m b/src/nsterm.m
-index a29f039..86bb7b6 100644
+index 41e8d4b..4692a58 100644
 --- a/src/nsterm.m
 +++ b/src/nsterm.m
-@@ -9205,6 +9205,292 @@ - (NSRect)accessibilityFrame
+@@ -9197,6 +9197,292 @@ - (NSRect)accessibilityFrame
  
  @end