切换语言无需重启

lib/main.dart

@@ -35,6 +35,12 @@ class MyApp extends StatefulWidget {
     required this.encouragementService,
   });
 
+  // Static method to access the state from anywhere (returns void to avoid exposing private type)
+  static void updateLocale(BuildContext context, String localeCode) {
+    final state = context.findAncestorStateOfType<_MyAppState>();
+    state?.updateLocale(localeCode);
+  }
+
   @override
   State<MyApp> createState() => _MyAppState();
 }
@@ -68,6 +74,13 @@ class _MyAppState extends State<MyApp> {
     }
   }
 
+  // Method to update locale from settings
+  void updateLocale(String localeCode) {
+    setState(() {
+      _locale = Locale(localeCode);
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

lib/screens/settings_screen.dart

@@ -3,6 +3,7 @@ import 'package:shared_preferences/shared_preferences.dart';
 import '../l10n/app_localizations.dart';
 import '../theme/app_colors.dart';
 import '../theme/app_text_styles.dart';
+import '../main.dart';
 
 /// Settings Screen - MVP version with duration presets
 class SettingsScreen extends StatefulWidget {
@@ -74,14 +75,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
       _selectedLocale = localeCode;
     });
 
-    // Show snackbar to inform user to restart
+    // Update locale immediately without restart
     if (!mounted) return;
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(
-        content: Text(AppLocalizations.of(context)!.onboardingReset),
-        duration: const Duration(seconds: 2),
-      ),
-    );
+    MyApp.updateLocale(context, localeCode);
   }
 
   @override