The Host's Inbox projection can reach the client before the prompt receipt.
Until the receipt published the echo, QueueDock showed the message as a
queued row, and in "On next message" mode the conversation followed the
grown tail and then folded back.
An Inbox row carrying the request id proves that the Host accepted the
prompt. The Session now publishes the echo and leaves the blank layout at
whichever of the receipt or the row arrives first, and calls the new
onAccept callback in that update. The composer settles inside that callback,
before the echo renders, so the fold starts from the shrunk composer instead
of depending on microtask order.
Yichen Jiang
317e56d108