You might want to build your WebApp in Canvas instead of HTML

>or by cleverly adding and removing elements from the DOM as the user zooms and pans. But at that point, you might be better off owning the rendering altogether.

brother it sounds like you may have gaslighted yourself into this lolz. you simply absolutely position components and then use matrix transform on container if you need custom zoom and pan. if you need to clip you add a clipping algorithm which is basic math. you can add LOD too and use basic tailwind for this and vibecode 90% of it in like 2 days. how long did this take you lol?