Transition changes in shortcut coloring

It'd be really cool to use https://maplibre.org/maplibre-style-spec/transition/, but it won't be easy. We swap out the GeoJSON data for each edit entirely. Transitions only work with changing layout properties. But still, worth thinking about eventually.

The issue mentions using MapLibre's transition property for shortcut coloring, but notes that GeoJSON data is swapped entirely per edit. Start by examining the frontend map rendering code, likely in Rust using WebAssembly, to understand how GeoJSON data is currently handled and where layout properties could be animated. Look for existing map styling or interaction modules. 'Done' would involve implementing smooth color transitions for shortcuts without breaking the current edit workflow.

Written by the indexing model from the issue text.