feat: 修复ios上未检测到账号，弹窗没显示问题

lib/app/utils/account_guard.dart

@@ -0,0 +1,21 @@
+import 'package:get/get.dart';
+import 'package:kaer_with_panels/app/common/app_run_data.dart';
+import 'package:kaer_with_panels/app/widgets/dialogs/hi_dialog.dart';
+import 'package:kaer_with_panels/app/routes/app_pages.dart';
+
+Future<bool> ensureAccountExists() async {
+  final rawAccount = KRAppRunData.getInstance().kr_account.value;
+  final account = rawAccount?.trim();
+  if (account == null || account.isEmpty || account.toLowerCase() == 'null') {
+    await HIDialog.show(
+      message: '未检测到账号信息，请重试初始化',
+      confirmText: '重试',
+      preventBackDismiss: true,
+      onConfirm: () {
+        Get.offAllNamed(Routes.KR_SPLASH);
+      },
+    );
+    return false;
+  }
+  return true;
+}