What continuing from the inbox needs: the answer's seq_id, which the
"New message" flow reports as the participant lookup's seq_id and the
conversation fetch's min_uq_seq_id. The 451 answer always issues it; an
answer without one is not an inbox snapshot and fails the screen's data
check, so there is no invented fallback on the way out.
What continuing from the inbox needs: the answer's
seq_id, which the "New message" flow reports as the participant lookup'sseq_idand the conversation fetch'smin_uq_seq_id. The 451 answer always issues it; an answer without one is not an inbox snapshot and fails the screen's data check, so there is no invented fallback on the way out.