Add end-to-end test for repositioned cover

[conico974]

Introduce an end-to-end test case for the page with a repositioned cover to ensure proper functionality.

[changeset-bot]

⚠️ No Changeset found

Latest commit: f2c745b

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[github-actions]

Summary of the deployments:

Version	URL	Status
Vercel	https://gitbook-v2-ldynblif5-gitbook.vercel.app	✅
Cloudflare	https://25c06383-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-ldynblif5-gitbook.vercel.app/url/gitbook.com/docs	https://25c06383-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-ldynblif5-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://25c06383-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open

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Build	Status	Details	Updated (UTC)
customers-v2 (Inspect)	👍 Changes approved	78 changed	Jul 1, 2025, 10:41 AM
v2-cloudflare (Inspect)	👍 Changes approved	19 changed, 4 added	Jul 1, 2025, 11:51 AM
v2-vercel (Inspect)	👍 Changes approved	30 changed, 4 added	Jul 1, 2025, 10:44 AM