carregarReplies() swallowed any fetch error, leaving whatever was already
in #pending-replies — on first load, the static "Nenhuma resposta
pendente." placeholder. A failed load was visually indistinguishable from
a genuine empty state, so a customer reply could go unnoticed with no
error surfaced (every other action in this file already toasts on
failure). Now shows an explicit error state and toasts, and the fetch
mock harness in campaign-ui.test.mjs gained toast-call tracking to prove it.
Found via a full-project audit.
Gustavo
2b83995446