after impersonating a user, we still show some pages that the user doesn't have permission to view    

4.21.0-0.nightly-2026-01-08-200223    

Always    

1. kube:admin user impersonate a normal user
2. wait until the message 'You are impersonating User testuser-1. You are viewing all resources and roles this User can access. Stop Impersonating' appear in masthead, then check the pages

2. we still show Home -> Overview, Compute, Administration -> Cluster Settings, Namespaces pages

when user tries to visit these pages, we will see Restricted access error    

2. should not show pages user doesn't have permission to view, even we wait for several minutes these pages still shown