Resource tabs now sit under the selected doctor and list only the resources that
doctor supervises, so moving between a doctor's own appointments and the devices
under them is one row of tabs rather than a flat list of everything.
The booking modal reads the doctor from the resource's supervisor instead of
asking again. The doctor↔resource relation is defined once, on the resource, and
repeating the question here would have made a second source of truth. A resource
whose supervisor was removed is blocked with a message pointing at the fix rather
than a silently disabled button.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
