shared-react-variant.md

@clerk/ui	minor
@clerk/react	minor
@clerk/shared	patch

Add shared React variant to reduce bundle size when using @clerk/react.

Introduces a new ui.shared.browser.js build variant that externalizes React dependencies, allowing the host application's React to be reused instead of bundling a separate copy. This can significantly reduce bundle size for applications using @clerk/react.

New features:

• @clerk/ui/register module: Import this to register React on globalThis.__clerkSharedModules for sharing with @clerk/ui
• clerkUIVariant option: Set to 'shared' to use the shared variant (automatically detected and enabled for compatible React versions in @clerk/react)

For @clerk/react users: No action required. The shared variant is automatically used when your React version is compatible.

For custom integrations: Import @clerk/ui/register before loading the UI bundle, then set clerkUIVariant: 'shared' in your configuration.