// E2E tests for every feature
describe('User Settings', () => {
  it('changes theme to dark mode', async () => { /* 30s test */ })
  it('changes theme to light mode', async () => { /* 30s test */ })
  it('updates avatar', async () => { /* 30s test */ })
  it('changes language to Spanish', async () => { /* 30s test */ })
  it('changes language to French', async () => { /* 30s test */ })
  // ... 50 more settings tests
})

// E2E for edge cases
describe('Error handling', () => {
  it('shows error on network timeout', async () => { /* 30s test */ })
  it('shows error on invalid input', async () => { /* 30s test */ })
  // ... 30 more error tests
})

// Total: 100 E2E tests, 50 minutes runtime

// E2E for core revenue-generating flows
describe('Critical User Journeys', () => {
  it('completes signup to first purchase', async () => {
    await page.goto('/signup')
    await page.fill('[name=email]', 'new@customer.com')
    await page.fill('[name=password]', 'SecurePass123!')
    await page.click('button[type=submit]')

    await page.waitForURL('/dashboard')
    await page.click('[data-testid=browse-products]')
    await page.click('[data-testid=product-1]')
    await page.click('[data-testid=add-to-cart]')
    await page.click('[data-testid=checkout]')
    // ... complete purchase

    await expect(page.locator('.order-confirmation')).toBeVisible()
  })

  it('existing user can login and reorder', async () => { /* ... */ })

  it('user can contact support', async () => { /* ... */ })
})

// 3-5 critical E2E tests, 5 minutes runtime
// Settings, error handling tested at unit/integration level