I need a complete, production-ready e-commerce solution built with Flutter for the mobile front end and a single shared backend that also powers a responsive website. Core user features must include: secure account creation and profile management, fast product search with filter options, a smooth cart and checkout flow, and payment gateway integration (Stripe, PayPal, Razorpay or similar—open to your recommendation). Push notifications for order updates are a plus. On the server side I want a dashboard where I can add or edit products, track stock in real time, and process or cancel orders. Every action taken in the admin panel should immediately reflect in both the app and the website through well-documented REST or GraphQL APIs. The website should reuse the same data and look great on desktop, mobile and tablet—no separate codebases. Please include in your proposal: • Flutter source code with clear folder structure • Backend source (Node.js, Laravel, Django or Firebase functions—your call) plus database schema • Fully responsive website linked to the same API • Basic deployment scripts and a short setup guide I’ll test by creating products, placing an order, and checking that inventory adjusts correctly across app and web. If everything syncs in real time and payments clear without errors, we’re good.