feat: EK-856: 管理员增加“Country”属性.

backendApi/modules/v1/controllers/AdminController.php

@@ -89,7 +89,7 @@ class AdminController extends BaseController
             } else {
                 $admin['countryId'] = AdminCountry::getCountry($admin['ID']);
                 $countryCode = Countries::find()->select('CODE')->where(['in', 'ID', $admin['countryId']])->column();
-                $admin['country'] = implode(',', $countryCode);
+                $admin['country'] = implode(' / ', $countryCode);
             }
         }