Echo user prompts into the local data store with a client-generated
message ID before server admission. The editor clears and the message
renders immediately; admission runs in a per-session background queue
that preserves steer order. The session.inbox.enqueued echo replaces
the local copy with server truth, wholesale sync replaces re-append
unconfirmed echoes, and failures roll back the echo, restore the
captured prompt, and toast.
Kit Langton
d4bd41c4ba