Server-rendered replay confirmation modal for the inbound record detail view.
Sibling of MailglassAdmin.Operator.ReplayModal (D-48-13), SIMPLIFIED: inbound
replay has no ambiguous-multi target (IADM-03 — the replay target is the record
itself), so there is no multi-target branch, no target cards, and no
confirm-enabled predicate. Confirm replay is always enabled while the modal is
open.