Add an option when clicking to delete a conversation, and roll back the task to this point at the same time.

[xusonfan]

Currently, when deleting a conversation, only a prompt to delete the conversation and its subsequent content is given. I hope to add an option to delete the conversation and roll back the task to this point. After clicking, it should be able to find the nearest checkpoint of this conversation and roll back the code to this state. This way, there is no need to first manually find the nearest checkpoint of this conversation to manually revoke the modification and then delete the conversation in these two steps.

[yuki-js]

same here, also a cancel button