修改 KRSecureStorage 类，确保每次操作前 box 都是打开状态。目前解决了从新打开app登录状态失效

(cherry picked from commit ab22be112a1753e5063799b5424f5d3feef06e2d)

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

@@ -1,5 +1,8 @@
 import 'dart:async';
 import 'dart:io';
+import 'package:http/http.dart' as http;
+import 'dart:convert';
+
 
 import 'package:flutter/material.dart';
 import 'package:path_provider/path_provider.dart';
@@ -1075,7 +1078,7 @@ class KRHomeController extends GetxController with WidgetsBindingObserver {
         // 后台切换成功，更新UI
         kr_cutSeletedTag.value = tag;
         kr_updateConnectionInfo();
-        kr_moveToSelectedNode();
+        // kr_moveToSelectedNode();
 
         // 🚀 方案A增强：增加验证前等待时间，确保活动组完全更新
         KRLogUtil.kr_i('⏳ [增强] 等待活动组更新（500ms）...', tag: 'HomeController');