[RSS1102]

🤔 这个 PR 的性质是？

• 日常 bug 修复
• 组件样式/交互改进
• 测试用例

🔗 相关 Issue

Closes #3222

相关方案讨论：#3981。

💡 需求背景和解决方案

SubMenu 按「子节点数 × 50px」限制展开高度，自定义 MenuItem 高度后会裁剪底部内容。

改为按实测高度执行展开/收起动画，展开完成后释放高度限制，收起完成后保持隐藏，同时处理嵌套、动态内容及动画中途反向切换。补充组件回归测试。

两个独立沙盒使用完全相同的示例代码，仅组件包版本不同：

• Menu 子菜单高度问题复现沙盒（tdesign-react@1.18.6）
• Menu 子菜单高度修复验证沙盒（PR #4473 CI 构建 7f4c0c2）

📝 更新日志

tdesign-react

• fix(Menu): 修复自定义菜单项高度时子菜单内容被裁剪的问题。

☑️ 请求合并前的自查清单

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• Changelog 已提供或无须提供

[github-actions]

Size Change: 0 B

Total Size: 76.3 kB

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packages/tdesign-react-aigc/es/chat-engine/components/json-render/renderer/JsonRenderActivityRenderer.js	842 B
packages/tdesign-react-aigc/es/chat-engine/components/json-render/renderer/JsonUIRenderer.js	1.68 kB
packages/tdesign-react-aigc/es/chat-engine/components/json-render/types.js	106 B
packages/tdesign-react-aigc/es/chat-engine/components/json-render/utils/sanitize-props.js	933 B
packages/tdesign-react-aigc/es/chat-engine/components/provider/agent-state.js	430 B
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packages/tdesign-react-aigc/es/chat-engine/components/shared/useRegistrationListener.js	554 B
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packages/tdesign-react-aigc/es/chat-engine/hooks/index.js	436 B
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packages/tdesign-react-aigc/es/chat-sender/index.js	349 B
packages/tdesign-react-aigc/es/chat-thinking/index.js	369 B
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packages/tdesign-react-aigc/es/index.js	1.37 kB
packages/tdesign-react-aigc/es/style/index.js	148 B

_{compressed-size-action::tdesign-react-chat}

[tdesign-bot]

TDesign Component Site Preview Open

Component	Preview
tdesign-react
@tdesign-react/chat

[pkg-pr-new]

• tdesign-react-demo

  npm i https://pkg.pr.new/tdesign-react@4473
  

  npm i https://pkg.pr.new/@tdesign-react/chat@4473
  

commit: e2fb99b

[github-actions]

Size Change: +179 B (+0.02%)

Total Size: 940 kB

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packages/tdesign-react/dist/tdesign.js	519 kB	+117 B (+0.02%)
packages/tdesign-react/dist/tdesign.min.js	303 kB	+62 B (+0.02%)

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packages/tdesign-react/dist/reset.css	1.93 kB
packages/tdesign-react/dist/tdesign.css	60.9 kB
packages/tdesign-react/dist/tdesign.min.css	55.1 kB

_{compressed-size-action::tdesign-react}