A service Zone is a client page section for a service feature. It composes store state, store actions, service UI controls, loading indicators, results, and pagination.
It is not a model list section by default. The `_search` Zone renders search administration UI, even though search itself is a service workflow rather than a document model.
Because service modules are workflow-oriented, service Zones are fairly flexible. Treat them as client components where you can freely compose the controls, result views, and domain-specific UI that the service needs.
