feat: wire build/test infra, trips API, and enriched journey stops

- Add tsconfig.json (server) + client/tsconfig.{json,app.json,node.json}
  so typecheck and tsc -b actually work.
- Fix npm test to run Playwright (was running vitest on Playwright specs);
  typecheck now covers both server and client.
- Mount routes before app.listen, add error handler, mount optional
  @tonycodes/auth-express middleware when AUTH_SECRET is set.
- Add /api/trips (GET/POST/PATCH/DELETE) backed by an in-memory store
  that gracefully degrades when DATABASE_URL is unset.
- Add prisma/seed.ts skeleton and server/types/express.d.ts for req.auth.
- Rewrite Grok prompt for combo-aware planning: charge+eat,
  stay+destination-charging, eat+viewpoint, etc., with amenities,
  cuisine, priceLevel, duration, day titles and trip highlights.
- Extend Stop schema + normalization to preserve all enrichment fields.
- New StopCard component renders combo pill, description, meta row
  (charge / stop / battery / cuisine / £-level) and amenity icons;
  map popups show the same enriched detail; timeline gains day titles
  and a HIGHLIGHTS sidebar.
- Fix server TS errors (vehicle accepted as string | {name,rangeKm},
  JSON parse results typed).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

prisma/seed.ts

@@ -0,0 +1,62 @@
+/**
+ * Tesla Roadtrip seed
+ *
+ * Generates a small demo trip so the API has something to return after a fresh setup.
+ * Requires DATABASE_URL and a Prisma client generated from prisma/schema.prisma.
+ *
+ * Run: npm run db:seed
+ */
+import { PrismaClient } from './generated/prisma/index.js';
+
+const prisma = new PrismaClient();
+
+async function main() {
+  const demoUserId = 'demo-user';
+
+  const existing = await prisma.trip.findFirst({ where: { userId: demoUserId } });
+  if (existing) {
+    console.log('Seed skipped — demo trip already exists:', existing.id);
+    return;
+  }
+
+  const trip = await prisma.trip.create({
+    data: {
+      userId: demoUserId,
+      title: 'London → Edinburgh (demo)',
+      vehicleModel: 'Model Y Long Range',
+      rangeMi: 320,
+      status: 'planning',
+      isPublic: false,
+      itinerary: {
+        days: [
+          {
+            day: 1,
+            stops: [
+              { id: 'london', name: 'London', type: 'custom', lat: 51.5074, lng: -0.1278, day: 1, order: 1 },
+              { id: 'mk-sc', name: 'Milton Keynes Supercharger', type: 'supercharger', lat: 52.0406, lng: -0.7594, day: 1, order: 2, chargeMinutes: 25 },
+              { id: 'leeds-sc', name: 'Leeds Supercharger', type: 'supercharger', lat: 53.8008, lng: -1.5491, day: 1, order: 3, chargeMinutes: 30 },
+            ],
+          },
+          {
+            day: 2,
+            stops: [
+              { id: 'edi', name: 'Edinburgh', type: 'attraction', lat: 55.9533, lng: -3.1883, day: 2, order: 1 },
+            ],
+          },
+        ],
+        summary: { totalDistanceKm: 670, estDriveHours: 8, estChargeHours: 1.2, superchargers: 2, hotels: 0 },
+      },
+    },
+  });
+
+  console.log('Seed created demo trip:', trip.id);
+}
+
+main()
+  .catch((err) => {
+    console.error('Seed failed:', err);
+    process.exit(1);
+  })
+  .finally(async () => {
+    await prisma.$disconnect();
+  });