Conversation history: a header button lists the user's earlier conversations (title and last activity, newest first). Older ones load as the user scrolls, and the first load fills the panel. Reopening one shows its newest messages, tool calls included, loads earlier ones as the user scrolls up, and the next message continues it. A conversation can be deleted from the list after an inline confirmation; deleting the open one starts a new chat.
The start screen lists the three most recent conversations under the greeting ("Earlier conversations", in the same rows as the history view), with "All" for the history view. Opening the panel still creates no conversation; that waits for the first message.
history option: false removes the history button.
While an operator acts on behalf of a tenant, the history view explains that conversations are not kept, and chatting continues without a conversation instead of failing.

The export of a reopened conversation covers its whole history, not only what was typed since the page loaded. Opening the export menu loads any earlier messages not on screen yet; its actions wait, marked as loading, until they are in.
Requires @revenexx/aria-sdk 0.5.0, bundled in. A build with an older SDK still works, without the history.

@revenexx/aria-widget v0.5.0