use third-party module to auto-persist queue store

+ more redesign
+ convert js files to ts

index.html

@@ -16,6 +16,6 @@
     </noscript>
     <div id="app"></div>
     <!-- built files will be auto injected -->
-    <script type="module" src="/src/main.js"></script>
+    <script type="module" src="/src/main.ts"></script>
   </body>
 </html>