T46 E2E: Playwright walks the built site, desktop and phone, live stories included

frontend/playwright.config.ts

@@ -0,0 +1,15 @@
+import { defineConfig, devices } from "@playwright/test";
+
+// Runs against the built site; the gallery must be built for this origin.
+export default defineConfig({
+  testDir: "e2e",
+  timeout: 60_000,
+  fullyParallel: true,
+  reporter: [["list"]],
+  use: { baseURL: "http://localhost:4173", trace: "retain-on-failure" },
+  webServer: { command: "pnpm preview --port 4173 --strictPort", url: "http://localhost:4173", reuseExistingServer: true },
+  projects: [
+    { name: "desktop", use: { ...devices["Desktop Chrome"] } },
+    { name: "phone", use: { ...devices["Pixel 7"] } },
+  ],
+});