Decline the application. The reason is required and is stored on the row.

A decline. The reason is required, and the service is the one that says so.

reason accepts an empty string on purpose: the emptiness check lives in admin_service.decline, so the refusal carries the machine-readable reason_required code that the admin queue shows, rather than a generic validation blob.

One affiliate as the admin queue sees it.

Wider than the affiliate's own AffiliateView: it carries user_id and decided_by_user_id so the queue can link to the account and show who decided. payout_details is masked here exactly as it is everywhere else.