Admin users have Team menu hidden if given dashboard role in team

### Current Behavior

This breaks admin users from being able to inspect/fix e.g.

- membership
- Team settings

ref: https://github.com/FlowFuse/flowfuse/issues/6472#issuecomment-3739265673

### Expected Behavior

Admin should ALWAYS see all menu options

### Steps To Reproduce

- Create team
- make admin dashboard only user on team

### Environment

- FlowFuse version: 2.27.0
- Node.js version:
- npm version:
- Platform/OS:
- Browser:

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

I have provided an initial effort estimate