fix: address PR review feedback

- Use unique ID prefix for clipPath to avoid duplicate ID issues
- Add cleanup function to initializeTheme to prevent memory leak
- Change tooltip to show action description instead of current theme name

src/App.tsx

@@ -31,10 +31,11 @@ function App() {
   const [authReady, setAuthReady] = useState(false);
 
   useEffect(() => {
-    initializeTheme();
+    const cleanupTheme = initializeTheme();
     void restoreSession().finally(() => {
       setAuthReady(true);
     });
+    return cleanupTheme;
   }, [initializeTheme, restoreSession]);
 
   useEffect(() => {