fix: include emoji event stores in IndexedDB cleanup

The userEmojiListEvents and emojiSetEvents stores were not included in
the cleanUp() method, causing their cached data to never expire. Add
both stores with a 7-day expiration period.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/services/indexed-db.service.ts

@@ -629,6 +629,14 @@ class IndexedDbService {
       {
         name: StoreNames.PIN_LIST_EVENTS,
         expirationTimestamp: Date.now() - 1000 * 60 * 60 * 24 * 30 // 30 days
+      },
+      {
+        name: StoreNames.USER_EMOJI_LIST_EVENTS,
+        expirationTimestamp: Date.now() - 1000 * 60 * 60 * 24 * 7 // 7 days
+      },
+      {
+        name: StoreNames.EMOJI_SET_EVENTS,
+        expirationTimestamp: Date.now() - 1000 * 60 * 60 * 24 * 7 // 7 days
       }
     ]
     const transaction = this.db!.transaction(