added settings to toggle the audio

lib/src/screens/settings_screen.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import '../services/deck_repository.dart';
 import 'home_screen.dart';
 
@@ -12,6 +13,8 @@ class SettingsScreen extends StatefulWidget {
 
 class _SettingsScreenState extends State<SettingsScreen> {
   final TextEditingController _apiKeyController = TextEditingController();
+  bool _playAudio = true;
+  bool _playCorrectSound = true;
 
   @override
   void dispose() {
@@ -19,6 +22,26 @@ class _SettingsScreenState extends State<SettingsScreen> {
     super.dispose();
   }
 
+  @override
+  void initState() {
+    super.initState();
+    _loadSettings();
+    final repo = Provider.of<DeckRepository>(context, listen: false);
+    repo.loadApiKey().then((key) {
+      if (key != null) {
+        _apiKeyController.text = key;
+      }
+    });
+  }
+
+  Future<void> _loadSettings() async {
+    final prefs = await SharedPreferences.getInstance();
+    setState(() {
+      _playAudio = prefs.getBool('playAudio') ?? true;
+      _playCorrectSound = prefs.getBool('playCorrectSound') ?? true;
+    });
+  }
+
   Future<void> _saveApiKey() async {
     final apiKey = _apiKeyController.text.trim();
     if (apiKey.isEmpty) return;
@@ -32,22 +55,11 @@ class _SettingsScreenState extends State<SettingsScreen> {
       );
 
       Navigator.of(context).pushReplacement(
-        MaterialPageRoute(builder: (_) => HomeScreen()),
+        MaterialPageRoute(builder: (_) => const HomeScreen()),
       );
     }
   }
 
-  @override
-  void initState() {
-    super.initState();
-    final repo = Provider.of<DeckRepository>(context, listen: false);
-    repo.loadApiKey().then((key) {
-      if (key != null) {
-        _apiKeyController.text = key;
-      }
-    });
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -85,6 +97,48 @@ class _SettingsScreenState extends State<SettingsScreen> {
               ),
               child: const Text('Save & Start Quiz'),
             ),
+            const SizedBox(height: 24),
+            SwitchListTile(
+              title: const Text(
+                'Play audio for vocabulary',
+                style: TextStyle(color: Colors.white),
+              ),
+              value: _playAudio,
+              onChanged: (value) async {
+                final prefs = await SharedPreferences.getInstance();
+                prefs.setBool('playAudio', value);
+                setState(() {
+                  _playAudio = value;
+                });
+              },
+              activeThumbColor: Colors.blueAccent,
+              inactiveThumbColor: Colors.grey,
+              tileColor: const Color(0xFF1E1E1E),
+              shape: RoundedRectangleBorder(
+                borderRadius: BorderRadius.circular(6),
+              ),
+            ),
+            const SizedBox(height: 12),
+            SwitchListTile(
+              title: const Text(
+                'Play sound on correct answer',
+                style: TextStyle(color: Colors.white),
+              ),
+              value: _playCorrectSound,
+              onChanged: (value) async {
+                final prefs = await SharedPreferences.getInstance();
+                prefs.setBool('playCorrectSound', value);
+                setState(() {
+                  _playCorrectSound = value;
+                });
+              },
+              activeThumbColor: Colors.blueAccent,
+              inactiveThumbColor: Colors.grey,
+              tileColor: const Color(0xFF1E1E1E),
+              shape: RoundedRectangleBorder(
+                borderRadius: BorderRadius.circular(6),
+              ),
+            ),
           ],
         ),
       ),