iconSize is a PointExpression, which has no x on its tuple form, so the client typecheck refused the size assertion; it now compares against L.point. The test ids follow the FE-PAGE-SHARED-MAP scheme in the order they run, and the comments around the cluster group say in a line what they said in a paragraph.
The share page drew every stop as its own pin while the planner drew the same
trip as a handful of clusters, so a shared link opened on three dozen
overlapping markers. On a 300px-tall map that covers a whole city, the pins
underneath can be neither read nor tapped (#2343).
The option block and the icon factory move to components/Map/markerCluster.ts,
which both maps import, so the two cannot drift apart again. The planner's
options are unchanged.
leaflet.markercluster's two stylesheets were imported by MapView.tsx alone.
The share page never mounts MapView, so it imports them itself: without them
the bubbles keep the library's default styling and spiderfy's legs are
invisible.
Maurice