Refactor and migrate Playwright E2E tests:

- Remove `playwright.config.js` to clean up configuration.
- Add new E2E test suites (`admin-pos-orders`, `admin-module-goals`, `admin-module-pos-mobile-order-flow`) to structure Admin module tests.
- Introduce reusable authentication and data seeding utilities in `fixtures` for streamlined test flows and maintainability.

tests/e2e/admin-pos-orders.spec.ts

@@ -0,0 +1,23 @@
+import { test, expect } from '@playwright/test';
+import {
+  loginAsOperator,
+  bookingTestData,
+} from './fixtures';
+
+test.describe('Admin POS Orders', () => {
+  test('loads orders list', async ({ page }) => {
+    await loginAsOperator(page);
+    const deptId = bookingTestData.departmentId.toString();
+    await page.goto(`/admin/${deptId}/modules/pos/orders`);
+    await expect(page).toHaveURL(new RegExp(`/admin/${deptId}/modules/pos/orders`));
+    await expect(page.locator('table')).toBeVisible();
+  });
+
+  test('loads order detail', async ({ page }) => {
+    await loginAsOperator(page);
+    const deptId = bookingTestData.departmentId.toString();
+    await page.goto(`/admin/${deptId}/modules/pos/orders/1`);
+    await expect(page).toHaveURL(new RegExp(`/admin/${deptId}/modules/pos/orders/1`));
+    await expect(page.locator('.order-items')).toBeVisible(); // adjust selector
+  });
+});