Large SVG route map for the Session Detail page's Map tab. Reuses
the same buildRoutePolyline projection as the Overview MiniMap,
just at a bigger viewBox, and overlays projected hotspot markers
on top of the polyline.
Hotspots render as a hollow ring in the kind's color plus a solid
dot in the center — readable against both the dark surface and the
amber route line.
Falls back to a centered "No GPS data" placeholder when the session
has fewer than two GPS-bearing samples.
Large SVG route map for the Session Detail page's Map tab. Reuses the same
buildRoutePolylineprojection as the Overview MiniMap, just at a bigger viewBox, and overlays projected hotspot markers on top of the polyline.Hotspots render as a hollow ring in the kind's color plus a solid dot in the center — readable against both the dark surface and the amber route line.
Falls back to a centered "No GPS data" placeholder when the session has fewer than two GPS-bearing samples.