Simplify tooltip implementation, add HoverCard

[zenoachtig]

• Stop hacking the Tooltip implementation to work on mobile, which was causing issues elsewhere
• Add HoverCard for inline link tooltips & AIChatInput context card

Fixes RND-7937

[linear]

RND-7937 Assistant context menu should hide tooltip/appear above it

[changeset-bot]

⚠️ No Changeset found

Latest commit: dd65715

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[github-actions]

Summary of the deployments:

Version	URL	Status
Vercel	https://gitbook-v2-42bc62ldp-gitbook.vercel.app	✅
Cloudflare	https://c569bb21-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-42bc62ldp-gitbook.vercel.app/url/gitbook.com/docs	https://c569bb21-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-42bc62ldp-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://c569bb21-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)	✅ No changes detected	-	Aug 21, 2025, 8:34 AM
v2-cloudflare (Inspect)	👍 Changes approved	4 changed	Aug 21, 2025, 8:38 AM
v2-vercel (Inspect)	✅ No changes detected	-	Aug 20, 2025, 3:42 PM