feat: 修改城市auto模式下节点显示问题

lib/app/modules/kr_home/controllers/kr_home_controller.dart

@@ -95,6 +95,13 @@ class KRHomeController extends GetxController with WidgetsBindingObserver {
   var kr_cutSeletedTag = 'auto'.obs;
   var kr_coutryText = 'auto'.obs;
 
+  var kr_selectedCountryTag = 'auto'.obs;
+  void kr_setSelectedCountryTag(String country) {
+    kr_selectedCountryTag.value = country;
+    kr_coutryText.value = country;
+    KRSecureStorage().kr_saveData(key: 'SELECTED_COUNTRY_TAG', value: country);
+  }
+
   /// 当前连接信息
   final RxString kr_currentIp = AppTranslations.kr_home.disconnected.obs;
   final RxString kr_currentProtocol = AppTranslations.kr_home.disconnected.obs;
@@ -273,6 +280,8 @@ class KRHomeController extends GetxController with WidgetsBindingObserver {
     // _kr_initBottomPanelHeight();
     // 加载闪连状态
     _loadQuickConnectStatus();
+    // 加载已选择的国家
+    await _loadSelectedCountryTag();
     // 绑定订阅状态
     _bindSubscribeStatus();
 
@@ -334,6 +343,20 @@ class KRHomeController extends GetxController with WidgetsBindingObserver {
     }
   }
 
+  Future<void> _loadSelectedCountryTag() async {
+    try {
+      final v =
+          await KRSecureStorage().kr_readData(key: 'SELECTED_COUNTRY_TAG');
+      if (v != null && v.isNotEmpty) {
+        kr_selectedCountryTag.value = v;
+        kr_coutryText.value = v;
+      } else {
+        kr_selectedCountryTag.value = 'auto';
+        kr_coutryText.value = 'auto';
+      }
+    } catch (_) {}
+  }
+
   /// 底部面板高度处理
   void _kr_initBottomPanelHeight() {
     ever(kr_currentListStatus, (status) {
@@ -921,10 +944,8 @@ class KRHomeController extends GetxController with WidgetsBindingObserver {
   Future<void> _kr_prepareCountrySelectionBeforeStart() async {
     try {
       KRLogUtil.kr_i('开始准备国家选择', tag: 'CountrySelect');
-      final storedCountry =
-          await KRSecureStorage().kr_readData(key: 'SELECTED_COUNTRY_TAG') ??
-              'auto';
-      KRLogUtil.kr_i('读取 SELECTED_COUNTRY_TAG: $storedCountry',
+      final storedCountry = kr_selectedCountryTag.value;
+      KRLogUtil.kr_i('使用响应式 SELECTED_COUNTRY_TAG: $storedCountry',
           tag: 'CountrySelect');
       if (storedCountry == 'auto') {
         KRLogUtil.kr_w('当前为 auto，按全局最优节点进行选择', tag: 'CountrySelect');
@@ -1483,9 +1504,12 @@ class KRHomeController extends GetxController with WidgetsBindingObserver {
 
     String actualTag;
 
+    if (kr_selectedCountryTag.value == 'auto') {
+      actualTag = kr_cutSeletedTag.value;
+    }
     // 🔧 优先策略：
     // 1. 如果 kr_cutTag 不是 auto，直接使用（用户手动选择的节点）
-    if (kr_cutTag.value != 'auto' &&
+    else if (kr_cutTag.value != 'auto' &&
         kr_cutTag.value != 'select' &&
         kr_cutTag.value.isNotEmpty) {
       // 用户手动选择了具体节点