ui fixes

web/repertory/lib/screens/auth_screen.dart

@@ -60,12 +60,7 @@ class _AuthScreenState extends State<AuthScreen> {
         return;
       }
 
-      ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(
-          content: Text('Invalid username or password'),
-          behavior: SnackBarBehavior.floating,
-        ),
-      );
+      displayErrorMessage(context, 'Invalid username or password', clear: true);
     }
 
     return Scaffold(

web/repertory/lib/widgets/app_dropdown.dart

@@ -116,6 +116,7 @@ class AppDropdownFormField<T> extends StatelessWidget {
       decoration: createCommonDecoration(
         scheme,
         labelText ?? "",
+        filled: true,
         icon: prefixIcon,
       ),
       dropdownColor: dropdownColor ?? effectiveFill,