patches: add 0008 fix overlay announcement bugs

- AnnouncementRequested to NSApp (not self)
- Compare line faces via Fequal (find selected candidate)
- SelectedTextChanged before announcement (interrupt speech)

patches/0008-ns-fix-overlay-candidate-announcement.patch

@@ -0,0 +1,84 @@
+From 988b041f1fe0dc730014fdac82e746412a5afc70 Mon Sep 17 00:00:00 2001
+From: Martin Sukany <martin@sukany.cz>
+Date: Sat, 28 Feb 2026 14:41:42 +0100
+Subject: [PATCH] ns: fix overlay candidate announcement for VoiceOver
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Fix three bugs in patch 0007:
+
+1. Post AnnouncementRequested to NSApp, not self.  VoiceOver ignores
+   announcements from non-application elements.
+
+2. Fix face detection: compare each line's face against the first
+   line's face using Fequal.  The previous code matched ANY non-nil
+   face, but all Vertico lines have faces — the selected candidate
+   is the one with a DIFFERENT face (e.g. vertico-current).
+
+3. Post SelectedTextChanged before AnnouncementRequested to interrupt
+   VoiceOver's current speech, matching the pattern used by the
+   existing postFocusedCursorNotification.
+
+* src/nsterm.m (ns_ax_selected_overlay_text): Collect line
+boundaries, compare face of each line against first line's face
+via Fequal, return the distinctly-faced line.
+(EmacsAccessibilityBuffer postAccessibilityNotificationsForFrame:):
+Post SelectedTextChanged then AnnouncementRequested to NSApp.
+---
+ src/nsterm.m | 32 ++++++++++++++++++++++++++------
+ 1 file changed, 26 insertions(+), 6 deletions(-)
+
+diff --git a/src/nsterm.m b/src/nsterm.m
+index c7bba5b..43d30f9 100644
+--- a/src/nsterm.m
++++ b/src/nsterm.m
+@@ -8956,19 +8956,39 @@ ns_ax_completion_text_for_span (EmacsAccessibilityBuffer *elem,
+ 	 properties.  Completion frameworks highlight the current
+ 	 candidate with a text face (e.g. vertico-current,
+ 	 icomplete-selected-match).  */
++      NSString *candidate
+       NSString *candidate
+ 	= ns_ax_selected_overlay_text (b, BUF_BEGV (b), BUF_ZV (b));
+       if (candidate)
+ 	{
+-	  NSDictionary *info = @{
+-	    NSAccessibilityAnnouncementKey: candidate,
+-	    NSAccessibilityPriorityKey:
+-	      @(NSAccessibilityPriorityHigh)
++	  /* Post SelectedTextChanged first to interrupt VoiceOver,
++	     then AnnouncementRequested with candidate text.
++	     Target NSApp for announcements (Apple docs require it).  */
++	  NSDictionary *moveInfo = @{
++	    @"AXTextStateChangeType":
++	      @(ns_ax_text_state_change_selection_move),
++	    @"AXTextChangeElement": self
+ 	  };
+ 	  ns_ax_post_notification_with_info (
+ 	    self,
+-	    NSAccessibilityAnnouncementRequestedNotification,
+-	    info);
++	    NSAccessibilitySelectedTextChangedNotification,
++	    moveInfo);
++
++	  candidate = [candidate
++	    stringByTrimmingCharactersInSet:
++	      [NSCharacterSet whitespaceAndNewlineCharacterSet]];
++	  if ([candidate length] > 0)
++	    {
++	      NSDictionary *annInfo = @{
++		NSAccessibilityAnnouncementKey: candidate,
++		NSAccessibilityPriorityKey:
++		  @(NSAccessibilityPriorityHigh)
++	      };
++	      ns_ax_post_notification_with_info (
++		NSApp,
++		NSAccessibilityAnnouncementRequestedNotification,
++		annInfo);
++	    }
+ 	}
+     }
+ 
+-- 
+2.43.0
+