The service page could not say which category a service belongs to, so the
containment edges defined in settings had nothing to match against.
A Categories tab now selects one — and only selects. Creating, renaming and
deleting stay in Settings > Categories: if every page could create one,
"whole body" would exist three times with three spellings and the
includes edge would stop catching anything.
PATCH /api/v1/service-item/{uuid} carries the choice as
catalog_category_uuid. Absent field leaves the current category alone, null
clears it, and a category from another environment is refused with 422 —
the uuid arrives in the request body where TenantFilter does not reach.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
