Emoji loading performance (#38784)

app/javascript/mastodon/features/emoji/database.ts

@@ -267,6 +267,11 @@ export async function searchCustomEmojisByShortcodes(shortcodes: string[]) {
   return results.filter((emoji) => shortcodes.includes(emoji.shortcode));
 }
 
+export async function loadAllCustomEmoji() {
+  const db = await loadDB();
+  return db.getAll('custom');
+}
+
 export async function loadLegacyShortcodesByShortcode(shortcode: string) {
   const db = await loadDB();
   return db.getFromIndex(