fix(composer): Escape closes the emoji and sticker boards (#304)

The board opens with focus in its search field, and its FocusTrap used
the shared stopPropagation helper, which ignores Escape while an input
is focused, so Escape never closed it (Chromium, Firefox, WebKit).
Always close on Escape here, still stopping the key from closing the
room or modal underneath. The GIF picker already uses the default.

Fixes #304

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/components/emoji-board/EmojiBoard.tsx

@@ -19,7 +19,7 @@ import { useVirtualizer } from '@tanstack/react-virtual';
 import { EmojiData, IEmoji, emojiGroups, emojis, loadEmojiData } from '../../plugins/emoji';
 import { useEmojiGroupLabels } from './useEmojiGroupLabels';
 import { useEmojiGroupIcons } from './useEmojiGroupIcons';
-import { preventScrollWithArrowKey, stopPropagation } from '../../utils/keyboard';
+import { preventScrollWithArrowKey } from '../../utils/keyboard';
 import { useRelevantImagePacks } from '../../hooks/useImagePacks';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useRecentEmoji } from '../../hooks/useRecentEmoji';
@@ -612,7 +612,13 @@ export function EmojiBoard({
           !editableActiveElement() && isKeyHotkey(['arrowdown', 'arrowright'], evt),
         isKeyBackward: (evt: KeyboardEvent) =>
           !editableActiveElement() && isKeyHotkey(['arrowup', 'arrowleft'], evt),
-        escapeDeactivates: stopPropagation,
+        // [Gitea #304] The board opens with focus in its search field, where
+        // the shared stopPropagation helper ignores Escape. Always close here,
+        // without letting the key also close the room/modal underneath.
+        escapeDeactivates: (evt: KeyboardEvent) => {
+          evt.stopPropagation();
+          return true;
+        },
       }}
     >
       <EmojiBoardLayout