[FEATURE]: 希望后台调试页面的上下文详情能显示对应的截图

[WSC741606]

📝 Feature Description [Please make everyone to understand it]

http://localhost:8000/contexts 页面，目前只能看到总结，不能看到原始的截图，希望能看到

👍 What problem does this feature solve

No response

👾 What does the proposed API look like

No response

🚑 Any additional information

No response

[qin-ctx]

现在是因为debug web界面访问不到userdata目录文件，我看看怎么修