[Bugs] MCP Servers are stuck at "Connecting" state

### Short summary

MCP servers in the 1.0.6 version do not connect. It is forever at connecting state.

### Affected version or release

v1.0.6

### Installation context

Mac 26.5

### What happened?

As seen, in the screenshot MCP servers remain in connecting state and do not ever connect. If I downgrade to the 1.0.2 or 1.0.3 versions then they connect perfectly.

New installation of MCP servers also do not connect. Tried a fresh install but the issue persists. LLMs also do not recognize any MCP servers.

OS: Mac 26.5

### Steps to reproduce

- Open Github Copilot 1.0.6 version
- Go to Settings -> MCP servers
- MCP servers do not connect and are forever in a "connecting" state

### Expected behavior

_No response_

### Additional context

_No response_

未指定源文件或测试。首先通过 Settings → MCP servers 在 GitHub Copilot 应用 v1.0.6 中重现该问题，然后将行为与 v1.0.2 或 v1.0.3 进行比较；当新安装的 MCP 服务器能够连接并被 LLMs 识别时，该问题即完成。

由索引模型根据 Issue 内容生成。