mweinbach7/2/2026, 1:59:57 PM

Queue the first message of a new chat with a pre-generated clientMessageId
and push its optimistic user bubble plus a pending turn-start state before
the workspace socket or thread session exists, so the transcript responds
at send click instead of after multiple round trips. The id travels through
the pending-message queue into turn/start so the server echo dedups against
the optimistic bubble, and thread-start failures or workspace disconnects
now clear the pending turn-start so the composer never sticks in Sending.

Co-authored-by: Cursor <cursoragent@cursor.com>

Parent4cf820f