An instance that is login protected via a proxy such as Cloudflare Zero Trust does not stop dashboard access when the session expires.

### Current Behavior

Arguably, if the dashboard is accessed through a proxy that requires the user to login, and the session expires, then access should be prevented until the user logs in again.

### Expected Behavior

_No response_

### Steps To Reproduce

_No response_

### Environment

- Dashboard version:
- Node-RED version:
- Node.js version:
- npm version:
- Platform/OS:
- Browser:

### Have you provided an initial effort estimate for this issue?

I am not a FlowFuse team member