Optimisation: Legacy (v1/v2) components marked as no longer supported

Optimisation: Components created on the old v1/v2 platform are now clearly marked as no longer supported, in the components list and when you open one.

What's changing. The old v1/v2 checkout extensions are being retired as part of the move to Shopify's new extension platform. If you still have a v1 or v2 component, its row on the Components page now shows a red warning, and opening it shows a banner explaining that it will stop rendering in your checkout.

What to do. If you're actively using one of these components, recreate it as a new component from the Components page. Today's components cover everything the old ones did, and more. If it's an old draft you no longer use, there's nothing to do.

Existing setups. Components on the current platform (v3.0) are completely unaffected.