[BUG] <title> chat组件动态更新时的滚动条问题

[hey-sm]

Is there an existing issue for this?

• I have searched the existing issues

Which Component

chat

Semi Version

2.68.3

Current Behavior

chat 组件的动态更新数据 内容出现滚动条时 在滚动条滑动后 在输入框内输入发送 滚动条会滑动到最底部 但是直接调用onMessageSend 不通过输入框调用时 滚动条不会滑动到最底部

Expected Behavior

不通过输入发送 直接调用onMessageSend发送新消息时始终保持滚动条滚动到最底部

Steps To Reproduce

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ReproducibleCode

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Environment

- OS:
- browser:

Anything else?

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