Add reconnect alert for config options

lib/features/config_option/notifier/config_option_notifier.dart

@@ -2,6 +2,8 @@ import 'dart:convert';
 
 import 'package:flutter/services.dart';
 import 'package:hiddify/features/config_option/data/config_option_repository.dart';
+import 'package:hiddify/features/connection/data/connection_data_providers.dart';
+import 'package:hiddify/features/connection/notifier/connection_notifier.dart';
 import 'package:hiddify/utils/custom_loggers.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
@@ -10,7 +12,29 @@ part 'config_option_notifier.g.dart';
 @Riverpod(keepAlive: true)
 class ConfigOptionNotifier extends _$ConfigOptionNotifier with AppLogger {
   @override
-  Future<void> build() async {}
+  Future<bool> build() async {
+    final serviceRunning = await ref.watch(serviceRunningProvider.future);
+    final serviceSingboxOptions =
+        ref.read(connectionRepositoryProvider).configOptionsSnapshot;
+    ref.listen(
+      ConfigOptions.singboxConfigOptions,
+      (previous, next) async {
+        if (!serviceRunning || serviceSingboxOptions == null) return;
+        if (next case AsyncData(:final value) when next != previous) {
+          if (_lastUpdate == null ||
+              DateTime.now().difference(_lastUpdate!) >
+                  const Duration(seconds: 3)) {
+            _lastUpdate = DateTime.now();
+            state = AsyncData(value != serviceSingboxOptions);
+          }
+        }
+      },
+      fireImmediately: true,
+    );
+    return false;
+  }
+
+  DateTime? _lastUpdate;
 
   Future<void> exportJsonToClipboard() async {
     final map = {