Create button remains visible when user has no creation permissions

Description

The Navbar "Create New" button remains visible even when a user does not have permission to create any resources.

The button is responsible for actions such as:

• Create channel
• Create team
• Create discussion
• Create direct message

When all of these permissions are unavailable, the button is still rendered in a disabled state.

Current behavior

Users see a disabled create button that cannot perform any action.

Expected behavior

The create button should not be displayed when no creation actions are available.

Why

Showing a non-functional action may create confusion and adds unnecessary UI clutter for restricted users.

Additional information

The menu sections array is empty when no creation actions are available, which could be used to determine whether the button should be rendered.

Start in the Navbar component that renders the "Create New" button and inspect how its menu sections array is built. Verify the behavior when that array is empty, then run the relevant frontend tests or checks. Done means the button is absent when no creation actions are available and remains available when at least one action exists.