Add Playwright e2e coverage and Node 20 pin

frontend/e2e/public.spec.ts

@@ -0,0 +1,25 @@
+import { expect, test } from '@playwright/test'
+
+test.use({ storageState: { cookies: [], origins: [] } })
+
+test.describe('public route smoke tests', () => {
+  test('landing page loads', async ({ page }) => {
+    await page.goto('/landing')
+
+    await expect(
+      page.getByRole('link', { name: 'Get Started Free' }),
+    ).toBeVisible()
+    await expect(
+      page.getByText('Stop writing ticket notes.'),
+    ).toBeVisible()
+  })
+
+  test('protected routes redirect unauthenticated users to landing', async ({ page }) => {
+    await page.goto('/sessions')
+
+    await expect(page).toHaveURL(/\/landing$/)
+    await expect(
+      page.getByRole('link', { name: 'Sign In' }),
+    ).toBeVisible()
+  })
+})