feat: Add emoji usage tracking hook and integrate with EmojiBoard for usage statistics

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

@@ -22,6 +22,7 @@ import { preventScrollWithArrowKey, stopPropagation } from '../../utils/keyboard
 import { useRelevantImagePacks } from '../../hooks/useImagePacks';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useRecentEmoji } from '../../hooks/useRecentEmoji';
+import { useEmojiUsage } from '../../hooks/useEmojiUsage';
 import { isUserId, mxcUrlToHttp } from '../../utils/matrix';
 import { editableActiveElement, targetFromEvent } from '../../utils/dom';
 import { useAsyncSearch, UseAsyncSearchOptions } from '../../hooks/useAsyncSearch';
@@ -378,13 +379,30 @@ export function EmojiBoard({
   addToRecentEmoji = true,
 }: EmojiBoardProps) {
   const mx = useMatrixClient();
+  const { trackEmojiUsage, getMostUsedEmoji } = useEmojiUsage();
 
   const emojiTab = tab === EmojiBoardTab.Emoji;
   const usage = emojiTab ? ImageUsage.Emoticon : ImageUsage.Sticker;
 
+  // Get default emoji - use most used or fallback to slight_smile
+  const defaultPreview = useMemo((): PreviewData => {
+    if (!emojiTab) return undefined;
+    
+    const mostUsedShortcode = getMostUsedEmoji();
+    if (mostUsedShortcode) {
+      // Find emoji by shortcode
+      const emoji = emojis.find((e) => e.shortcode === mostUsedShortcode);
+      if (emoji) {
+        return { key: emoji.unicode, shortcode: emoji.shortcode };
+      }
+    }
+    // Fallback to default
+    return DefaultEmojiPreview;
+  }, [emojiTab, getMostUsedEmoji]);
+
   const previewAtom = useMemo(
-    () => createPreviewDataAtom(emojiTab ? DefaultEmojiPreview : undefined),
-    [emojiTab]
+    () => createPreviewDataAtom(defaultPreview),
+    [defaultPreview]
   );
   const activeGroupIdAtom = useMemo(() => atom<string | undefined>(undefined), []);
   const setActiveGroupId = useSetAtom(activeGroupIdAtom);
@@ -439,6 +457,10 @@ export function EmojiBoard({
       onEmojiSelect?.(emojiInfo.data, emojiInfo.shortcode);
       if (!evt.altKey && !evt.shiftKey && addToRecentEmoji) {
         addRecentEmoji(mx, emojiInfo.data);
+        // Track emoji usage for favorites
+        trackEmojiUsage(emojiInfo.shortcode).catch((err) => {
+          console.error('Failed to track emoji usage:', err);
+        });
       }
     }
     if (emojiInfo.type === EmojiType.CustomEmoji) {