fix UserMenu rendered twice on Main page (#3110)

fix: fix UserMenu rendered twice on Main page

frontend/src/pages/Main/index.jsx

@@ -15,13 +15,9 @@ export default function Main() {
   }
 
   return (
-    <>
-      <UserMenu>
-        <div className="w-screen h-screen overflow-hidden bg-theme-bg-container flex">
-          {!isMobile && <Sidebar />}
-          <DefaultChatContainer />
-        </div>
-      </UserMenu>
-    </>
+    <div className="w-screen h-screen overflow-hidden bg-theme-bg-container flex">
+      {!isMobile && <Sidebar />}
+      <DefaultChatContainer />
+    </div>
   );
 }