Add end-to-end tests for task assignment, modification, sorting, and child view updates

- Implement tests to verify that assigned titles display the correct child name in various chore and reward views.
- Create tests to ensure that child updates via SSE reflect correctly in the UI for task modifications, including point overrides and pending status resets.
- Add tests to validate the sorting order of tasks and rewards in both child and parent views, ensuring proper prioritization of pending, completed, and scheduled tasks.
- Introduce tests for scrolling behavior to ensure edited tasks are brought into view after modifications.

frontend/vue-app/e2e/mode_parent/task-assignment/assign-title-shows-child-name.spec.ts

@@ -0,0 +1,55 @@
+// spec: e2e/plans/bugs-1.0.6-set01.plan.md §1
+
+import { test, expect, type APIRequestContext } from '@playwright/test'
+
+const CHILD_NAME = 'AssignTitleChild'
+
+async function createTestChild(request: APIRequestContext, name: string): Promise<string> {
+  const pre = await request.get('/api/child/list')
+  for (const c of (await pre.json()).children ?? []) {
+    if (c.name === name) await request.delete(`/api/child/${c.id}`)
+  }
+  await request.put('/api/child/add', { data: { name, age: 8 } })
+  const list = await request.get('/api/child/list')
+  return (await list.json()).children?.find((c: any) => c.name === name)?.id ?? ''
+}
+
+test.describe('Assign view heading shows child name', () => {
+  let childId = ''
+
+  test.beforeAll(async ({ request }) => {
+    childId = await createTestChild(request, CHILD_NAME)
+  })
+
+  test.afterAll(async ({ request }) => {
+    if (childId) await request.delete(`/api/child/${childId}`)
+  })
+
+  test('"Assign Chores" heading contains child name', async ({ page }) => {
+    await page.goto(`/parent/${childId}/assign-chores?name=${CHILD_NAME}`)
+    await expect(
+      page.getByRole('heading', { name: new RegExp(`Assign Chores.*${CHILD_NAME}`) }),
+    ).toBeVisible()
+  })
+
+  test('"Assign Rewards" heading contains child name', async ({ page }) => {
+    await page.goto(`/parent/${childId}/assign-rewards?name=${CHILD_NAME}`)
+    await expect(
+      page.getByRole('heading', { name: new RegExp(`Assign Rewards.*${CHILD_NAME}`) }),
+    ).toBeVisible()
+  })
+
+  test('"Assign Kindness Acts" heading contains child name', async ({ page }) => {
+    await page.goto(`/parent/${childId}/assign-kindness?name=${CHILD_NAME}`)
+    await expect(
+      page.getByRole('heading', { name: new RegExp(`Assign Kindness Acts.*${CHILD_NAME}`) }),
+    ).toBeVisible()
+  })
+
+  test('"Assign Penalties" heading contains child name', async ({ page }) => {
+    await page.goto(`/parent/${childId}/assign-penalties?name=${CHILD_NAME}`)
+    await expect(
+      page.getByRole('heading', { name: new RegExp(`Assign Penalties.*${CHILD_NAME}`) }),
+    ).toBeVisible()
+  })
+})