feat(clerk-js,localizations,types): Prep work to support email_code as a second factor

[tmilewski]

Description

NOTE: Currently behind a feature flag.

This is prep work to support email_code as a valid second factor. (See demo in Slack.)

There will likely be some changes design/copy-wise, but this is good to have in the meantime to test E2E.

I'm leaving the non-en-US localizations undefined, until we settle on copy.

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:

[changeset-bot]

🦋 Changeset detected

Latest commit: f63f334

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 22 packages

Name	Type
@clerk/localizations	Minor
@clerk/clerk-js	Minor
@clerk/types	Minor
@clerk/clerk-react	Patch
@clerk/chrome-extension	Patch
@clerk/clerk-expo	Patch
@clerk/agent-toolkit	Patch
@clerk/astro	Patch
@clerk/backend	Patch
@clerk/elements	Patch
@clerk/expo-passkeys	Patch
@clerk/express	Patch
@clerk/fastify	Patch
@clerk/nextjs	Patch
@clerk/nuxt	Patch
@clerk/react-router	Patch
@clerk/remix	Patch
@clerk/shared	Patch
@clerk/tanstack-react-start	Patch
@clerk/testing	Patch
@clerk/themes	Patch
@clerk/vue	Patch

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Project	Deployment	Preview	Comments	Updated (UTC)
clerk-js-sandbox	Ready	Preview	Comment	Oct 31, 2025 6:39pm

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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 tom/supported-factors

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