Cascader: Selection of menu group permitted on searched value of an uncomplete model

[framework-res]

Reproduction link

https://stackblitz.com/edit/b4ckadru-zqnbtxtu?file=src%2Fapp%2Fapp.component.ts

Steps to reproduce

-Create a uncompleted model of a menu tree without childrens and that is not leaf with children = []

-Try to search and select the node that is not leaf (Hangzhou in stack blitz example)

What is expected?

That the node that is not a leaf is not set as a value

What is actually happening?

Node that is not leaf is set as value

Environment	Info
ng-zorro-antd	18.2.1
Browser	Brave

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Into mine current project, menu tree could be created by user administrator. So will be appreciate if you can add that control, thanks