Hey, thanks for the report. In version 2.5, chats were reworked into tabs, so the “Clear all chats” command was renamed to “Close all tabs”. You can find it via the Command Palette CMD+Shift+P by typing “Close all tabs”.
The same issue was discussed here: "Clear all chats" command is gone in Cursor 2.5
Let me know if that’s what you were looking for, or if the problem is something else.