fix(e2e): decouple smoke home test from featured collection image

The smoke home test asserted that the featured collection hero rendered an
`<img>`. The featured collection is the most-recently-updated collection in
the preview store (`sortKey: UPDATED_AT`), and its image is optional in the
template (`{image && ...}` in _index.tsx). When the newest collection has no
image (currently "Freeride"), the hero renders only its heading and the test
times out waiting for an image that is never present.

Assert the featured collection heading (`h1`, the collection title, which is
always present) instead, per the "Dynamic Store Data" guidance in
e2e/CLAUDE.md. The product grid image assertion still verifies Image rendering
against reliable product data.

Author: lucyxiang

e2e/specs/smoke/home.spec.ts

@@ -3,7 +3,7 @@ import {test, expect, setTestStore} from '../../fixtures';
 setTestStore('hydrogenPreviewStorefront');
 
 test.describe('Home Page', () => {
-  test('should display hero image, product grid, and no console errors', async ({
+  test('should display featured collection, product grid, and no console errors', async ({
     page,
   }) => {
     const consoleErrors: string[] = [];
@@ -15,20 +15,15 @@ test.describe('Home Page', () => {
 
     await page.goto('/');
 
-    const heroImage = page
-      .getByRole('link')
-      .filter({
-        has: page.getByRole('heading', {level: 1}),
-      })
-      .getByRole('img');
+    const featuredCollectionHeading = page.getByRole('heading', {level: 1});
 
     const productGridImage = page
       .getByRole('region', {name: 'Recommended Products'})
       .getByRole('link')
       .first()
       .getByRole('img');
 
-    await expect(heroImage).toBeVisible();
+    await expect(featuredCollectionHeading).toBeVisible();
     await expect(productGridImage).toBeVisible();
 
     expect(consoleErrors).toHaveLength(0);