`derp/probe`  in web ssh doesn't contain custom port

### Description

<img width="2326" height="954" alt="Image" src="https://github.com/user-attachments/assets/65068f53-ea1b-4257-b75f-35e199329aa3" />

the derper is be `IP:8443`

### Headplane Version

v0.7

### Headscale Version

v0.28.0