赵月辉 / fastgpt-migrated

* feat: auto-preview HTML code blocks in chat streaming

Co-authored-by: Cursor <cursoragent@cursor.com>

* feat: improve HTML code block preview and response modal layout

Co-authored-by: Cursor <cursoragent@cursor.com>

* fix: simplify HTML code block preview state

* perf: code

* fix(chat): 修复 HTML 预览 Tab 被重置，并优化完整响应弹窗代码块布局

稳定 react-markdown components 引用以保留用户手动切换的 Code/Preview 状态；同时修正弹窗内代码块高度约束、JSON fence 渲染与弹窗 maxH。

Co-authored-by: Cursor <cursoragent@cursor.com>

* refactor: simplify html code block preview state

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Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: archer <545436317@qq.com>