[Bug]: 5.0.49中layout配置LR失效，未正常渲染右侧展开子节点

### Describe the bug / 问题描述

官方示例中，layout配置项内direction为LR的缩进树子节点在点击展开/折叠时方向异常。

### Reproduction link / 复现链接

https://g6.antv.antgroup.com/examples/scene-case/default/#fund-flow

### Steps to Reproduce the Bug or Issue / 重现步骤

demo中点击首次未展开的子节点，子节点向左侧偏移展开。
该问题在5.0.48中未出现。

### Version / 版本

🆕 5.x

### OS / 操作系统

- [ ] macOS
- [x] Windows
- [ ] Linux
- [ ] Others / 其他

### Browser / 浏览器

- [x] Chrome
- [ ] Edge
- [ ] Firefox
- [ ] Safari (Limited support / 有限支持)
- [ ] IE (Nonsupport / 不支持)
- [ ] Others / 其他

Reproduce the issue in the linked fund-flow demo using G6 5.0.49, Chrome on Windows, with layout direction set to LR, and compare it with 5.0.48. Trace the expand/collapse behavior for the initially collapsed child; done means the child expands to the right as it did in 5.0.48.

Written by the indexing model from the issue text.