feat: enhance Playwright testing setup with E2E tests, new skills, and improved documentation

- Added E2E test setup in `auth_api.py` with `/e2e-seed` endpoint for database reset and test user creation.
- Integrated Playwright for end-to-end testing in the frontend with necessary dependencies in `package.json` and `package-lock.json`.
- Created Playwright configuration in `playwright.config.ts` to manage test execution and server setup.
- Developed new skills for Playwright best practices, visual regression, smoke test generation, and self-healing tests.
- Implemented new test cases for chore creation in `chores-create.smoke.spec.ts` and `chores-create.spec.ts`.
- Added page object models for `ChildEditPage` and `LandingPage` to streamline test interactions.
- Updated `.gitignore` to exclude Playwright reports and test results.
- Enhanced documentation in `copilot-instructions.md` for testing and E2E setup.

frontend/vue-app/tests/global-setup.ts

@@ -0,0 +1,44 @@
+import { chromium } from '@playwright/test'
+
+const BACKEND_URL = 'http://localhost:5000'
+const BASE_URL = 'https://localhost:5173'
+
+export const E2E_EMAIL = 'e2e@test.com'
+export const E2E_PASSWORD = 'E2eTestPass1!'
+export const E2E_PIN = '1234'
+export const STORAGE_STATE = 'tests/.auth/user.json'
+
+// Matches PARENT_AUTH_KEY and PARENT_AUTH_EXPIRY_PERSISTENT in src/stores/auth.ts
+const PARENT_AUTH_KEY = 'parentAuth'
+const TWO_DAYS_MS = 172_800_000
+
+export default async function globalSetup() {
+  // Reset all tables and insert a verified test user directly via the backend
+  const seedRes = await fetch(`${BACKEND_URL}/auth/e2e-seed`, { method: 'POST' })
+  if (!seedRes.ok) {
+    throw new Error(`e2e-seed failed: ${seedRes.status} ${await seedRes.text()}`)
+  }
+
+  // Use a real browser to log in so that HttpOnly auth cookies are captured correctly
+  const browser = await chromium.launch()
+  const context = await browser.newContext({ ignoreHTTPSErrors: true })
+  const page = await context.newPage()
+
+  await page.goto(`${BASE_URL}/auth/login`)
+  await page.fill('#email', E2E_EMAIL)
+  await page.fill('#password', E2E_PASSWORD)
+  await page.click('button[type="submit"]')
+
+  // After login the router redirects away from /auth — wait for that navigation
+  await page.waitForURL(/\/(child|parent)/)
+
+  // Inject persistent parent auth into localStorage so tests can access /parent routes
+  // without navigating through the PIN prompt UI
+  await page.evaluate(
+    ({ key, expiresAt }) => localStorage.setItem(key, JSON.stringify({ expiresAt })),
+    { key: PARENT_AUTH_KEY, expiresAt: Date.now() + TWO_DAYS_MS },
+  )
+
+  await context.storageState({ path: STORAGE_STATE })
+  await browser.close()
+}