[Bug]: Sequential thinking output missing

### Platform

macOS

### Operating system version

MacOS Tahoe 26.3.1

### System architecture

ARM64 (M1, M2, etc)

### PolyScope Version

0.13

### Bug description

When sequential thinking is running, I cannot view the contents of sequential thinking.

### Steps to reproduce

1. Make sure sequential thinking is installed: https://github.com/modelcontextprotocol/servers/tree/main/src/sequentialthinking
2. instruct claude to always use it.
3. You wont see the output.

### Relevant log output

```shell

```

在 macOS ARM64 上启用 MCP sequentialthinking 服务器并指示 Claude 使用它，在 PolyScope 0.13 中复现该问题。没有指定源文件或测试，因此首先定位接收并渲染 sequential-thinking 输出的代码。在其运行期间能够看到 sequential-thinking 的内容即表示完成。

由索引模型根据 Issue 内容生成。