Cannot set/change role for a new user

### Description

When I try to change/set the role for a new user (tried both Member and Admin), nothing happens. The network response says it's reassigned, but the GUI shows Unregistered.

<img width="1668" height="1732" alt="Image" src="https://github.com/user-attachments/assets/a4687185-ffa1-43e3-a518-7470db2fcafa" />





### Headplane Version

v0.6.2-beta.4

### Headscale Version

v0.27.1