fix: add missing aiTypeaheadRef definition

app/static/js/app.jsx

@@ -7296,6 +7296,7 @@ const App = () => {
   const [showAISuggestions, setShowAISuggestions] = useState(true);
   const [showAIActionLog, setShowAIActionLog] = useState(false);
   const aiPromptMgrRef = useRef(null);
+  const aiTypeaheadRef = useRef(null);
   const [selectedProviderId, setSelectedProviderId] = useState('');
   const [exportSettings, setExportSettings] = useState({
     sampleRate: '44100',