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.

backend/api/auth_api.py

@@ -25,7 +25,11 @@ from api.error_codes import (
     INVALID_CREDENTIALS, NOT_VERIFIED, ACCOUNT_MARKED_FOR_DELETION,
     REFRESH_TOKEN_REUSE, REFRESH_TOKEN_EXPIRED, MISSING_REFRESH_TOKEN,
 )
-from db.db import users_db, refresh_tokens_db
+from db.db import (
+    users_db, refresh_tokens_db, child_db, task_db, reward_db, image_db,
+    pending_reward_db, pending_confirmations_db, tracking_events_db,
+    child_overrides_db, chore_schedules_db, task_extensions_db,
+)
 from api.utils import normalize_email
 
 logger = logging.getLogger(__name__)
@@ -35,6 +39,9 @@ TokenQuery = Query()
 TOKEN_EXPIRY_MINUTES = 60 * 4
 RESET_PASSWORD_TOKEN_EXPIRY_MINUTES = 10
 ACCESS_TOKEN_EXPIRY_MINUTES = 15
+E2E_TEST_EMAIL = 'e2e@test.com'
+E2E_TEST_PASSWORD = 'E2eTestPass1!'
+E2E_TEST_PIN = '1234'
 
 
 def send_verification_email(to_email, token):
@@ -460,3 +467,37 @@ def logout():
     resp = jsonify({'message': 'Logged out'})
     _clear_auth_cookies(resp)
     return resp, 200
+
+
+@auth_api.route('/e2e-seed', methods=['POST'])
+def e2e_seed():
+    """Reset the database and insert a verified test user. Only available outside production."""
+    if os.environ.get('DB_ENV', 'prod') == 'prod':
+        return jsonify({'error': 'Not available in production'}), 403
+
+    child_db.truncate()
+    task_db.truncate()
+    reward_db.truncate()
+    image_db.truncate()
+    pending_reward_db.truncate()
+    pending_confirmations_db.truncate()
+    users_db.truncate()
+    tracking_events_db.truncate()
+    child_overrides_db.truncate()
+    chore_schedules_db.truncate()
+    task_extensions_db.truncate()
+    refresh_tokens_db.truncate()
+
+    norm_email = normalize_email(E2E_TEST_EMAIL)
+    user = User(
+        first_name='E2E',
+        last_name='Tester',
+        email=norm_email,
+        password=generate_password_hash(E2E_TEST_PASSWORD),
+        verified=True,
+        role='user',
+        pin=E2E_TEST_PIN,
+    )
+    users_db.insert(user.to_dict())
+
+    return jsonify({'email': norm_email}), 201