fix: [Chat]Fix special symbols causing conversion errors

[YyumeiZhang]

中文模板 / Chinese Template

• I have read and followed Pull Request Guidelines of the contributing guide.

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Test Case
• TypeScript definition update
• Document improve
• CI/CD improve
• Branch sync
• Other, please describe:

PR description

Fixes #

修改前：
使用 MarkdownRender 组件时候，使用的模式是 mdx 模式 (format="mdx", 默认），在渲染文件类型时候，用了 JSX。

问题：
mdx默认是下，<, { 等特殊符号会认为是 jsx 代码的一部分，不转义会导致解析出现 SyntaxError

修改后：
不通过MarkdownRender 渲染文件，使用 md 模式 (format="md", 默认）。

Changelog

🇨🇳 Chinese

• Fix: 修复 Chat 组件内容显示部分解析未转义字符时候的 SyntaxError

---

🇺🇸 English

• Fix: Fixed SyntaxError when parsing unescaped characters in Chat component message box

Checklist

• Test or no need
• Document or no need
• Changelog or no need

Other

• Skip Changelog

Additional information

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit c699ebb:

Sandbox	Source
pr-story	Configuration