[BUG] VS Code sidebar interface does not allow MCP server login

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When using the vscode sidebar option for Claude Code, typing /mcp shows this dialog:

<img width="828" height="409" alt="Image" src="https://github.com/user-attachments/assets/ae16f5b8-eeef-4be3-948b-8d0fca8525d7" />

In the console version of the app, you could re-authenticate your connection to an HTTP-based MCP server in the /mcp interface, but with the sidebar version you can't do anything about it; nothing you can click on does anything.

What Should Happen?

Clicking on the server that needs auth should initiate the authentication flow.

Error Messages/Logs

Steps to Reproduce

1. Have an HTTP MCP server that uses OAuth
2. Let the OAuth token expire
3. Launch Claude Code in a vscode sidebar
4. Type the /mcp command

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.9

Platform

Other

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_