# Implementation Plan

1. Add an initially hidden vehicle information card to `area-preview.js` and responsive card styles to
   `cesium-preview.css`.
2. Extend the browser runtime vehicle records with stable identity, parsed model metadata, incident status,
   note, and a marker entity.
3. Gate route-distance advancement on normal state; add status transition helper for marker, route material,
   and card refresh.
4. Add Cesium click picking and card controls. Keep the existing selector synchronized for follow/route use.
5. Add focused assertions to `test-preview-assets.js` for card wiring, status behavior, and marker/route
   contracts.
6. Run syntax checks, preview test, stage test, target-area preview regeneration, and `check:area`.

## Rollback

Revert only the preview HTML/CSS/runtime/test files. No package, Blender, route, or OSM product files should
need rollback.