Chat history moved to the cloud
AI conversations used to live in the browser, which meant they were gone if you switched device or cleared your data. They are now stored with your account, along with the drawing each message produced — so undo still works after a reload, and an unfinished drawing is waiting for you on the Files page.
Conversations continue after a reload, and on another device.
Drawings you never saved appear as drafts on the Files page instead of disappearing.
Guests can write a prompt before signing in; the prompt is sent for you once you are in.
Undo is derived from the drawing attached to each message, so the history survives a reload.
Conversations made before this change are carried up from the browser the next time you open the document.
Deleting a document deletes its conversation with it.