tour: On the right side of the screen, the code panel is empty and no code is displayed.

Context: https://go-tour-ua-translation.lm.r.appspot.com/methods/2

<img width="3008" height="1623" alt="Image" src="https://github.com/user-attachments/assets/85c0c50d-a837-4781-bc2c-0ae6c577112c" />