🐛 [Bug]: Grid滚动条不应该从表头开始

[nsnans]

Version

^3.28.0

Vue Version

^3.5.24

Link to minimal reproduction

官网例子

https://www.opentiny.design/tiny-vue/zh-CN/os-theme/components/grid

Step to reproduce

https://opentiny.csdn.net/692968ba2087ae0db79d4227.html#devmenu4

可以看到，重构前的表格滚动条是没有从表头开始。
有ui要求的表格的滚动条基本不会从表头开始，这太难调整了

What is expected

No response

What is actually happening

No response

What is your project name

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Any additional comments (optional)

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Title: 🐛 [Bug]: Grid scroll bar should not start from the header