Hey, thanks for the report. I see the screenshot, and yeah, Rename is missing from the context menu.
This looks like a recurring regression. We had a similar issue back in 2.6: Regression Chat history UI in 2.6: can't delete, rename, see current selected agent chat. I’ve shared this with the team.
For now, a workaround is to rename the chat from the agents sidebar. Click the three dots next to the chat name, then pick Rename.
Let me know if that doesn’t work.