feat(clerk-js,ui): Show SBB totals in Checkout

[dstaley]

Description

This PR adds support for displaying phase two (limit) seat based billing totals in Checkout. To support this, LineItems.Title description was updated to handle multiple lines of description elements, allowing us to render the seat limits.

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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Latest commit: 9c4c743

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Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Ready	Preview, Comment	Mar 12, 2026 8:10pm

[mauricioabreu]

💯