patches: review fixes — eassert, blank lines, Texinfo doc

- nsterm.m: Remove 2 stray blank lines at start of
  ns_ax_event_is_line_nav_key body
- nsterm.m: Add eassert([NSThread isMainThread]) to ensureTextCache
  for explicit main-thread contract enforcement
- New 0002 patch: Texinfo section in doc/emacs/macos.texi documenting
  VoiceOver accessibility, Zoom tracking, completion announcements
- README.txt: Updated file listing and patch index

patches/0002-doc-add-VoiceOver-accessibility-section-to-macOS-app.patch

@@ -0,0 +1,83 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Martin Sukany <martin@sukany.cz>
+Date: Fri, 27 Feb 2026 17:30:00 +0100
+Subject: [PATCH 2/2] doc: add VoiceOver accessibility section to macOS
+ appendix
+
+Document the new VoiceOver accessibility support in the Emacs manual.
+Add a new section to the macOS appendix covering screen reader usage,
+keyboard navigation feedback, completion announcements, and Zoom
+cursor tracking.
+
+* doc/emacs/macos.texi (VoiceOver Accessibility): New section.
+---
+ doc/emacs/macos.texi | 46 +++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 46 insertions(+)
+
+diff --git a/doc/emacs/macos.texi b/doc/emacs/macos.texi
+index 1234567..abcdefg 100644
+--- a/doc/emacs/macos.texi
++++ b/doc/emacs/macos.texi
+@@ -31,6 +31,7 @@ Support}), but we hope to improve it in the future.
+ * Mac / GNUstep Basics::        Basic Emacs usage under GNUstep or macOS.
+ * Mac / GNUstep Customization:: Customizations under GNUstep or macOS.
+ * Mac / GNUstep Events::        How window system events are handled.
++* VoiceOver Accessibility::     Screen reader support on macOS.
+ * GNUstep Support::             Details on status of GNUstep support.
+ @end menu
+ 
+@@ -272,6 +273,51 @@ services and receive the results back.  Note that you may need to
+ restart Emacs to access newly-available services.
+ 
+ 
++@node VoiceOver Accessibility
++@section VoiceOver Accessibility (macOS)
++@cindex VoiceOver
++@cindex accessibility (macOS)
++@cindex screen reader (macOS)
++
++  When built with the Cocoa interface on macOS, Emacs exposes buffer
++content, cursor position, mode lines, and interactive elements to the
++macOS accessibility subsystem.  This enables use with VoiceOver,
++Apple's built-in screen reader, and with other assistive technology
++such as macOS Zoom.
++
++  Toggle VoiceOver with @kbd{Cmd-F5} (or via System Settings,
++Accessibility, VoiceOver).  When Emacs is focused, VoiceOver announces
++the buffer name and current line.  Standard Emacs navigation produces
++speech feedback:
++
++@itemize @bullet
++@item
++Arrow keys read individual characters (left/right) or full lines
++(up/down).
++@item
++@kbd{M-f} and @kbd{M-b} announce words.
++@item
++@kbd{C-n} and @kbd{C-p} read the destination line.
++@item
++Shift-modified movement announces selected or deselected text.
++@item
++@key{TAB} and @kbd{S-@key{TAB}} navigate interactive elements
++(buttons, links, completion candidates) within a buffer.
++@end itemize
++
++  The @file{*Completions*} buffer announces each completion candidate
++as you navigate, even while keyboard focus remains in the minibuffer.
++
++  macOS Zoom (System Settings, Accessibility, Zoom) tracks the Emacs
++cursor automatically when set to follow keyboard focus.  The cursor
++position is communicated via @code{UAZoomChangeFocus} and the
++@code{AXBoundsForRange} accessibility attribute.
++
++  This support is available only on the Cocoa build; GNUstep has a
++different accessibility model and is not yet supported
++(@pxref{GNUstep Support}).  Evil-mode block cursors are handled
++correctly: character navigation announces the character at the cursor
++position, not the character before it.
++
+ @node GNUstep Support
+ @section GNUstep Support
+ 
+-- 
+2.43.0