Add test coverage for "Review History" functionality after app disconnect.

It's often useful to be able to continue to inspect specific data in Observatory after the target application has closed (e.g., inspecting a CPU profile, timeline, etc). DevTools should continue to show the most recent data after an application has disconnected instead of blocking the entire screen with a "Disconnected" message.

首先定位 DevTools 中 Review History 的实现，以及针对断开连接状态的现有测试。在评审数据可用后重现应用断开连接的情况，然后添加测试覆盖，表明最新数据仍可供检查，而不是让屏幕被 "Disconnected" 消息阻塞。

由索引模型根据 Issue 内容生成。