trails/openspec/changes/archive/2026-04-04-journal-route-previews/tasks.md

1. Server — Expose GeoJSON

• 1.1 Add geojsonFromGeom() helper using ST_AsGeoJSON(geom) to convert PostGIS geometry to GeoJSON string
• 1.2 Update listRoutes() to return simplified GeoJSON per route via ST_AsGeoJSON(ST_Simplify(geom, 0.001))
• 1.3 Update getRoute() to return full-resolution GeoJSON
• 1.4 Update listActivities() to return simplified GeoJSON per activity
• 1.5 Update getActivity() to return full-resolution GeoJSON

2. Route List Page — Map Thumbnails

• 2.1 Create RouteMapThumbnail component: small MapView + RouteLayer, no controls, auto-fit bounds
• 2.2 Add thumbnail to each route card in routes._index.tsx (lazy-loaded via Suspense)
• 2.3 Show placeholder when route has no geometry

3. Activity List Page — Map Thumbnails

• 3.1 Add thumbnail to each activity card in activities._index.tsx (reuse RouteMapThumbnail)
• 3.2 Show placeholder when activity has no geometry

4. Route Detail Page — Interactive Map

• 4.1 Add full-width MapView + RouteLayer to routes.$id.tsx, auto-fit bounds
• 4.2 Skip map section when route has no geometry

5. Activity Detail Page — Interactive Map

• 5.1 Add full-width MapView + RouteLayer to activities.$id.tsx, auto-fit bounds
• 5.2 Skip map section when activity has no geometry

6. i18n

• 6.1 Add translation keys for map placeholder text (en + de)

7. Testing

• 7.1 E2E: route detail page shows map when route has geometry
• 7.2 E2E: route list page renders without errors