Add end-to-end tests for parent item management

- Implement tests for creating, editing, and deleting chores, kindness acts, and penalties.
- Add tests to verify conversion of default items to user items and restoration of system defaults upon deletion.
- Ensure proper cancellation of creation and editing actions.
- Create a comprehensive plan document outlining the test scenarios and expected behaviors.

frontend/vue-app/e2e/mode_parent/create-child/authorization.spec.ts

@@ -0,0 +1,16 @@
+// spec: e2e/plans/create-child.plan.md
+
+import { test, expect } from '@playwright/test'
+import { STORAGE_STATE_NO_PIN } from '../../e2e-constants'
+
+test.use({ storageState: STORAGE_STATE_NO_PIN })
+
+test.describe('Create Child', () => {
+  test('Add Child FAB is hidden when parent auth is expired', async ({ page }) => {
+    // Navigate to app root - with no parent auth, router redirects to /child
+    await page.goto('/')
+
+    // expect: the 'Add Child' FAB is NOT visible (not in parent mode)
+    await expect(page.getByRole('button', { name: 'Add Child' })).not.toBeVisible()
+  })
+})