Can I vibecode Ecwid?

Build a comprehensive, lightweight, and embeddable ecommerce platform inspired by Ecwid. The system should allow users to manage a central product catalog and embed a standalone storefront widget into any existing website.
Use exactly this stack: Next.js 15, TypeScript, PostgreSQL, Drizzle ORM, Stripe Checkout for payments, and an S3-compatible API for digital asset storage.

Primary job: Create a headless-first ecommerce engine where a merchant can define products, manage inventory, and generate a small JavaScript snippet that renders a fully functional shopping cart and checkout flow on any external HTML page.

Key Requirements:
1. **Centralized Merchant Dashboard**: Build a secure admin panel where the store owner can manage physical and digital products. Support product variants (size, color), SKU tracking, dynamic pricing, and inventory stock levels. Include a dashboard view summarizing recent sales, orders, and customer data.
2. **Embeddable Storefront Widget**: Develop a lightweight, framework-agnostic JavaScript widget (e.g., bundled as an IIFE or Web Component) that merchants can drop into external sites (WordPress, Wix, plain HTML). The widget should render the product catalog, handle cart state (using local storage), and initiate the checkout process.
3. **Checkout and Fulfillment**: Integrate Stripe Checkout for secure payment processing. Implement strict webhook validation to securely update order statuses. For digital goods, automatically generate and email secure, time-limited download links via the S3 integration upon successful payment. For physical goods, collect shipping addresses and calculate basic shipping tiers.
4. **Multichannel Architecture**: Design the database and API to support multiple "sales channels." Even if only the web widget is fully implemented, the schema should allow for future integrations (like social media feeds) by tagging orders with their source channel.
5. **Marketing and SEO**: Ensure the hosted fallback storefront (Instant Site) has excellent SEO basics. Include features for the merchant to create promotional coupons (percentage or fixed amount off) and manage basic automated email receipts.

Security & Data Handling:
- All sensitive keys must be stored in `.env` (provide `.env.example`).
- Ensure the embeddable widget uses CORS securely and prevents cross-site scripting (XSS).
- Store user data locally by default for development, with clear production deployment instructions.
- Do NOT build a multi-tenant SaaS. This is a personal, single-merchant instance.

Testing & Documentation:
- Write robust unit tests for the cart logic and total calculation (handling taxes/discounts).
- Write integration tests for the Stripe webhook handling.
- Provide a comprehensive README covering local setup, database migrations, Stripe testing, and instructions on how to embed the store widget.