I suddenly lost my half-written qq space without prompting to save it. Can you get it back?

Yes, the system will automatically save it for you. Let me tell you something. First click on the log on the navigation, and then there is a small column on the left to show the classification of the log. Look down at all your categories and you will see a "draft box" written in black font. It took me a long time to find it! Go there and have a look, there should be!

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Re-write a log and see that there is no system prompt at the top right that says, "You have a log named xxx that has not been completed ..." Just click on it. If there is no prompt, just click "Read and save the manuscript" at the top right to try. If not, there is really no way. Good luck!