An independent bookstore — books by section with staff picks, a browsable catalog and book detail, cart and checkout (mock-payment demo), over the app's own /api.
Open Marginalia — Bookstore in the no-code builder and it reshapes itself as you chat — rename it, retheme it, add screens, change the data model. Publish when you are ready. You are not editing a page: the template is a complete product, with a web app, a native mobile app, a REST API and a seeded database.