What is the difference between "AI Discussion" and "Discussion" in the mobile Discussions section, and how do I switch between them?

1. After entering the "Discussions" page, there are two tabs at the top: "Discussion" on the left is the general discussion list, and "AI Discussion" on the right is the AI discussion mode. 2. Click the "AI Discussion" tab to switch to AI discussion mode; click the "Discussion" tab to switch back to the general discussion list. 3. To delete a topic, click the 🗑 delete icon on the right side of that row and confirm to remove it.