BUG: high CPU usage on documentation site

Browsing the modular-forms doc site consumes a lot of CPU. Unsure what the cause is, but probably worth looking into. Only happens when the tab is focused. <img width="797" height="334" alt="Image" src="https://github.com/user-attachments/assets/13156366-9b3d-4ce4-a8a8-8e416bff3629" />