🐛 [Bug]: d-splitter 分割器，pane组件通过for循环实现，不显示bar

[urhome-wz]

Version

1.6.0

Vue Version

3.3.4

Link to minimal reproduction

PSplitter, PSplitterPane

Step to reproduce

在d-splitter-pane 上增加 v-for="item in 3"

What is expected

No response

What is actually happening

No response

Any additional comments (optional)

No response

[urhome-wz]

[已提交]https://github.com/DevCloudFE/vue-devui/pull/1771