fixed issue #2

frontend/lib/provider/quote_provider.dart

@@ -1,5 +1,6 @@
 // gets all quotes from the database and returns them in a list
 
+import 'package:go_router/go_router.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:flutter/material.dart';
 
@@ -218,4 +219,18 @@ class QuoteProvider extends ChangeNotifier {
         return Theme.of(context).textTheme.bodyMedium!.color!;
     }
   }
+
+  void showListPageFilteredByAuthor(BuildContext context, int index) {
+    filterController.text = sortedAuthorCounts[index].key;
+    filterBy = 0; // filter by author
+    // navigate to the main page
+    GoRouter.of(context).go('/');
+    Future.microtask(() => notifyListeners());
+  }
+
+  void resetLeaderboardFilter() {
+    filterController.text = '';
+    filterBy = 0;
+    notifyListeners();
+  }
 }