fix: 更新诸多bug

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

@@ -200,7 +200,9 @@ class KRHomeController extends GetxController with WidgetsBindingObserver {
 
       // 检查当前是否已连接
       if (kr_isConnected.value) {
-        KRLogUtil.kr_i('当前已连接，跳过自动连接', tag: 'QuickConnect');
+        KRLogUtil.kr_i('当前已连接，同步线路信息', tag: 'QuickConnect');
+        await _restoreSelectedNode();
+        kr_updateConnectionInfo();
         return;
       }
 
@@ -1609,7 +1611,8 @@ class KRHomeController extends GetxController with WidgetsBindingObserver {
 
     String actualTag;
 
-    if (kr_selectedCountryTag.value == 'auto') {
+    if (kr_selectedCountryTag.value == 'auto' &&
+        kr_cutSeletedTag.value.isNotEmpty) {
       actualTag = kr_cutSeletedTag.value;
     }
     // 🔧 优先策略：