feat: add functions to validate today's timestamps and update pending status logic

frontend/e2e/mode_parent/task-modification/reward-edit-cost.spec.ts

@@ -45,6 +45,28 @@ async function openEditModal(page: Page, card: Locator): Promise<void> {
   await expect(page.getByRole('button', { name: 'Save' })).toBeVisible()
 }
 
+async function seedPendingReward(
+  request: APIRequestContext,
+  childId: string,
+  rewardId: string,
+  rewardCost: number,
+): Promise<void> {
+  await request.put(`/api/child/${childId}/edit`, { data: { points: rewardCost } })
+
+  const requestResp = await request.post(`/api/child/${childId}/request-reward`, {
+    data: { reward_id: rewardId },
+  })
+
+  if (requestResp.status() === 409) {
+    await request.post(`/api/child/${childId}/cancel-request-reward`, {
+      data: { reward_id: rewardId },
+    })
+    await request.post(`/api/child/${childId}/request-reward`, {
+      data: { reward_id: rewardId },
+    })
+  }
+}
+
 test.describe('Reward edit cost', () => {
   test.describe.configure({ mode: 'serial' })
 
@@ -172,9 +194,8 @@ test.describe('Reward edit cost', () => {
     page,
     request,
   }) => {
-    // Give child enough points to satisfy the original reward cost, then create a pending request
-    await request.put(`/api/child/${childId}/edit`, { data: { points: REWARD_COST } })
-    await request.post(`/api/child/${childId}/request-reward`, { data: { reward_id: rewardId } })
+    // Ensure a fresh pending request exists for this test.
+    await seedPendingReward(request, childId, rewardId, REWARD_COST)
 
     await page.goto(`/parent/${childId}`)
     const card = rewardSection(page).locator('.item-card').filter({ hasText: REWARD_NAME })
@@ -197,8 +218,11 @@ test.describe('Reward edit cost', () => {
 
   test('Editing a pending reward — confirming the warning opens the override modal', async ({
     page,
+    request,
   }) => {
-    // Pending state was established in the previous test; navigate fresh
+    // Seed pending state in this test to avoid cross-test coupling.
+    await seedPendingReward(request, childId, rewardId, REWARD_COST)
+
     await page.goto(`/parent/${childId}`)
     const card = rewardSection(page).locator('.item-card').filter({ hasText: REWARD_NAME })
     await card.waitFor({ state: 'visible' })