Map Bake-Off: Leaflet vs MapLibre

Fourth engine bake-off: the incumbent Leaflet stack vs raw maplibre-gl vs the two Svelte 5 MapLibre wrappers (svelte-maplibre by imfeld, svelte-maplibre-gl by MIERUNE). One page, four anchored panes, each mounted on scroll (3 WebGL contexts + Leaflet on one page). Shared seed: Oslo sports-facility markers, exclusive overlays, and a fleet-spec venue tile pyramid (sharp 256px, {z}/{y}/{x} order) served from static/ — plus the synthetic mercator bounds math that lets every engine render the pixel-space venue map. Verdict panel scaffolds the four criteria; cells fill after the Captain's test drive.