Move the cart drawer component from ThemeLive.PreviewPages to the
shared ShopComponents module. The component now supports:
- mode attribute (:live for real stores, :preview for theme editor)
- subtotal attribute (default nil shows "£0.00")
- cart_items attribute (default empty list)
In preview mode, "View basket" navigates via LiveView JS commands.
In live mode, it links directly to /cart.
Preview pages now explicitly pass demo values:
<.cart_drawer cart_items={...} subtotal="£72.00" mode={:preview} />
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Jamey Greenwood
50941d278f