feat(expo,react): Make Signal hooks the default

[dstaley]

Description

This PR moves our experimental useSignInSignal and useSignUpSignal hooks into their rightful place as the default useSignIn and useSignUp hooks. It moves the previous hooks to a @clerk/react/legacy export. It also updates Expo's use of the legacy hooks to the new export.

It adds the /legacy export to the Next.js, React Router, Tanstack Start, and Expo SDKs.

It also deletes the @clerk/remix package and all supporting files that referenced it.

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

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⚠️ No Changeset found

Latest commit: 34bf263

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
clerk-js-sandbox	Skipped			Oct 10, 2025 4:45pm

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ds.feat/clerk-react-legacy-hooks

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