When placing or dragging a waypoint within 50m of a visible POI, the
waypoint snaps to the POI's exact coordinates and adopts its name.
Snapping only applies to visible POIs (enabled categories, current
viewport). Explicit name (from "Add as waypoint" button) is preserved
without snapping.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
