fix(log): hide admin identity in user-visible management logs

Admin username/ID was embedded directly into the log Content for
quota changes and forced 2FA disable, leaking the operator's
identity to the target user via their own usage log page.

Move operator info into Other.admin_info so formatUserLogs strips
it for non-admin viewers, and render it in the expand panel only
for admins as "操作管理员".

Closes #4301

web/src/i18n/locales/ru.json

@@ -1713,6 +1713,7 @@
     "操作失败，请重试": "Операция не удалась, попробуйте еще раз",
     "操作成功完成！": "Операция успешно завершена!",
     "操作暂时被禁用": "Операция временно отключена",
+    "操作管理员": "Администратор операции",
     "操作类型": "Тип операции",
     "操练场": "Тренировочная площадка",
     "操练场和聊天功能": "Тренировочная площадка и чат-функции",