Love it. But there is a significant usability issue: Lack of signifier (aka affordance). How do I known when something is zoomable? Because there is no signifier, I am frequently disappointed when I click on something and it turns out it is not zoomable.

that would be more on the consumer of the library than on the library imo.

Like I wouldn't expect any other frontend router library to decorate links for me in a certain way.

Fair point. No visual cue for what's zoomable is a real gap. Thinking about how to handle that without cluttering the UI.