[Bug] Clients display external headscale hostname rather than internal

[Haarolean]

Is this a support request?

• [x] This is not a support request

Is there an existing issue for this?

• [x] I have searched the existing issues

Current Behavior

Not sure if it's intended (as it's not documented either), but the clients used to display the internal (base_domain) hostname near the account(-s) before 0.27.0, now it's server_url. This looks unintentional, bc on mobile there are two labels now with the same value:

Expected Behavior

expected to see the internal one as before?

Steps To Reproduce

1. add account
2. see hostname
3. ???
4. profit

Environment

- OS: alpine
- Headscale version: 0.27.0
- Tailscale version: 1.88.4

Runtime environment

• [x] Headscale is behind a (reverse) proxy
• [x] Headscale runs in a container

Debug information