fixed issue #2

frontend/lib/pages/leaderboard.dart

@@ -3,12 +3,29 @@ import 'package:frontend/provider/quote_provider.dart';
 import 'package:frontend/values/constants.dart';
 import 'package:provider/provider.dart';
 
-class LeaderboardPage extends StatelessWidget {
+class LeaderboardPage extends StatefulWidget {
   const LeaderboardPage({super.key});
 
+  @override
+  State<LeaderboardPage> createState() => _LeaderboardPageState();
+}
+
+class _LeaderboardPageState extends State<LeaderboardPage> {
+  @override
+  void initState() {
+    super.initState();
+
+    // reset filter once, only when page is created
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      final provider = context.read<QuoteProvider>();
+      provider.resetLeaderboardFilter();
+    });
+  }
+  
   @override
   Widget build(BuildContext context) {
     final provider = context.watch<QuoteProvider>();
+    
     return Center(
       child: Column(
         children: [
@@ -21,6 +38,7 @@ class LeaderboardPage extends StatelessWidget {
                     Card(
                       color: provider.getLeaderboardEntryBgColor(context, index),
                       child: ListTile(
+                        onTap: () { provider.showListPageFilteredByAuthor(context, index); },
                         contentPadding: EdgeInsets.symmetric(
                           vertical: 0,
                           horizontal: Constants.edgeInset,

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();
+  }
 }