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/navigation.spec.ts

@@ -0,0 +1,21 @@
+// spec: e2e/plans/create-child.plan.md
+
+import { test, expect } from '@playwright/test'
+
+test.describe('Create Child', () => {
+  test('Cancel navigates back without saving', async ({ page }) => {
+    // 1. Navigate to app root - router redirects to /parent (children list)
+    await page.goto('/')
+    await page.getByRole('button', { name: 'Add Child' }).click()
+    await expect(page.getByRole('heading', { name: 'Create Child' })).toBeVisible()
+
+    // 2. Fill in 'Frank' and '9', then click Cancel
+    await page.getByLabel('Name').fill('Frank')
+    await page.getByLabel('Age').fill('9')
+    await page.getByRole('button', { name: 'Cancel' }).click()
+
+    // expect: back on /parent and 'Frank' is NOT listed
+    await expect(page).toHaveURL('/parent')
+    await expect(page.getByText('Frank')).not.toBeVisible()
+  })
+})