feat: use Sidebar

ui/src/App.tsx

@@ -1,9 +1,11 @@
 import Topbar from "./components/Topbar";
+import Sidebar from "./components/Sidebar";
 import { BrowserRouter } from 'react-router-dom'
 
 const App = () => (
   <BrowserRouter>
     <Topbar />
+    <Sidebar />
   </BrowserRouter>
 );