Replace the static ship marker with three signal-backed ships that
lerp along waypoint loops through SF Bay (Golden Gate, Oakland, and
Sausalito ferry routes). All clients see the same ship positions via
shared Go state synced every second.
Provides a Go API for interactive maps within Via applications:
- Plugin serves vendored MapLibre GL JS v4.7.1 assets
- Map struct with pre/post-render source, layer, marker, popup management
- Viewport signal sync (center, zoom, bearing, pitch) via hidden inputs
- FlyTo, SetCenter, SetZoom and other viewport setters via ExecScript
- Idempotent init script with SPA cleanup via MutationObserver
- Example app demonstrating markers, GeoJSON layers, and FlyTo actions
