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>

playwright.config.ts

@@ -2,10 +2,10 @@ import { defineConfig, devices } from '@playwright/test';
 
 export default defineConfig({
   testDir: './tests',
-  fullyParallel: false,           // Run tests sequentially for now (we're iterating on one flow)
+  fullyParallel: false,
   forbidOnly: !!process.env.CI,
   retries: process.env.CI ? 2 : 0,
-  workers: 1,                     // One worker so we can watch logs easily
+  workers: 1,
   reporter: [['html', { open: 'never' }], ['list']],
 
   use: {
@@ -13,6 +13,8 @@ export default defineConfig({
     trace: 'on-first-retry',
     screenshot: 'only-on-failure',
     video: 'retain-on-failure',
+    // Slow down actions so a human can watch the realistic flow
+    slowMo: process.env.HEADED ? 450 : 0,
   },
 
   projects: [
@@ -21,7 +23,4 @@ export default defineConfig({
       use: { ...devices['Desktop Chrome'] },
     },
   ],
-
-  // We expect both servers to be running already
-  // (user will run ./scripts/dev.sh or npm run dev in another terminal)
-});
+});