Linkage across vertices when Shift-Deleting multiple vertices

When using Shift + Delete on multiple vertices of a path, the position of one vertex can become linked to the handle of a different vertex.

## Steps to reproduce

1. With a blank document, create an ellipse
2. Enable the path tool, and select the right and bottom vertices
3. Press Shift + Delete
4. Separate out the subpaths and observe that moving the right vertex of the smaller subpath changes the direction of the right vertex from the larger subpath

## Video

https://github.com/user-attachments/assets/5d29e193-b274-4360-b7f9-459fba61a83d

## Other details

- Observed on latest and stable web versions
- Seems to apply for any number of nodes highlighted before pressing Shift + Delete, above 1 (however only one node/handle pair has this connection)
- Moving the affected handle directly stops this from happening

使用 path 工具、一个椭圆以及 Shift + Delete 删除多个顶点，在 Web 版本中重现该问题。然后跟踪 path 工具对多顶点删除和子路径分离的处理。完成的标准是：删除多个顶点后，某个顶点的位置不再与另一个顶点的控制柄相链接，包括移动受影响的顶点或控制柄时也不会链接。

由索引模型根据 Issue 内容生成。