When I am at the first diff in a file, I want to click the up button to get to the last diff: <img width="506" height="191" alt="Image" src="https://github.com/user-attachments/assets/a9724081-c30d-4b23-aabb-c89da6476094" />
When I am at the first diff in a file, I want to click the up button to get to the last diff: