The detail panel had editors for inference, instructions, resource caps and
accounts, but nothing for the permissions the swarm grants, which could only
be set at create time or with swarmctl. A permissions row shows the grant
(the default set, none, or the list) and an edit dialog ticks the catalogue
from GET /api/permissions and saves with PUT /api/agents/{agent}/permissions.
Ticking exactly the default set sends the DELETE, as the create form sends no
list for it.
