Update navbar styling

Author: FooChao

frontend/package-lock.json

@@ -13,6 +13,7 @@
   "dependencies": {
     "@hookform/resolvers": "^5.2.1",
     "@radix-ui/react-dialog": "^1.1.15",
+    "@radix-ui/react-dropdown-menu": "^2.1.16",
     "@radix-ui/react-label": "^2.1.7",
     "@radix-ui/react-slot": "^1.2.3",
     "axios": "^1.12.2",