chat responses can't be selected while they are still being output

### Describe the bug / 描述问题

the chat response ui element resets text selection when the output is still being sent out, the copy button in code segments is unclickable because it flashes with every character change in the UI container

### To Reproduce / 复现步骤

n/a

### Expected behavior / 期望行为

be able to copy while the output is still being sent out

### Screenshots / 截图

_No response_

### Devtools Info / 开发者工具信息

n/a

### OS and version / 操作系统版本

n/a

### ChatALL version / ChatALL 版本

n/a

### Network / 网络

n/a

### Additional context / 其它相关信息

_No response_