引导、通知栏计时

lib/screens/settings_screen.dart

@@ -110,6 +110,24 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   _showAboutDialog();
                 },
               ),
+              const Divider(color: AppColors.divider),
+              ListTile(
+                contentPadding: EdgeInsets.zero,
+                title: Text(
+                  'Reset Onboarding',
+                  style: AppTextStyles.bodyText.copyWith(
+                    color: AppColors.textSecondary,
+                  ),
+                ),
+                trailing: const Icon(
+                  Icons.refresh,
+                  size: 16,
+                  color: AppColors.textSecondary,
+                ),
+                onTap: () {
+                  _resetOnboarding();
+                },
+              ),
             ],
           ),
 
@@ -318,4 +336,40 @@ class _SettingsScreenState extends State<SettingsScreen> {
       ),
     );
   }
+
+  void _resetOnboarding() async {
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('Reset Onboarding?'),
+        content: Text(
+          'This will show the onboarding screens again when you restart the app.',
+          style: AppTextStyles.bodyText,
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('Cancel'),
+          ),
+          TextButton(
+            onPressed: () async {
+              final prefs = await SharedPreferences.getInstance();
+              await prefs.remove('onboarding_completed');
+
+              if (!context.mounted) return;
+
+              Navigator.pop(context);
+              ScaffoldMessenger.of(context).showSnackBar(
+                const SnackBar(
+                  content: Text('Onboarding reset. Restart the app to see it again.'),
+                  duration: Duration(seconds: 3),
+                ),
+              );
+            },
+            child: const Text('Reset'),
+          ),
+        ],
+      ),
+    );
+  }
 }