test(web-next): add Playwright config + smoke specs (home, about, blog 404)

apps/web-next/e2e/home.spec.ts

@@ -0,0 +1,12 @@
+import { test, expect } from "@playwright/test";
+
+test("home page renders site name + nav + article list", async ({ page }) => {
+  await page.goto("/");
+  // Page renders and shows site name
+  await expect(page.locator("h1").first()).toBeVisible();
+  // Site name from siteSettings (mock seed: "My App")
+  await expect(page.locator("body")).toContainText(/My App/i);
+  // Nav element is present on the page
+  const nav = page.locator("nav");
+  await expect(nav).toHaveCount(1);
+});