I need an end-to-end mobile solution that lets customers place restaurant pick up orders from both Android and iOS devices. The build should include three core user areas—Customer, Restaurant Partner, and an internal Admin panel—to keep daily operations smooth and transparent. Key functions I must see working at launch: • Real-time order tracking so individuals always know where their meal is at • Seamless in-app payments (major cards, Apple Pay, Google Pay preferred) with secure vaulting and easy refund handling. • A ratings and reviews flow that encourages honest feedback for both dishes and restaurants. Beyond the apps themselves, I will need: • A clean, browser-based admin dashboard where I can onboard restaurants, view orders, and handle support tickets. • Restaurant partner tools to accept, reject, or update order status and set menu items or promos. • Scalable backend (Firebase, AWS, or similar) and well-documented APIs for future expansion—adding a driver module later, for example. I’m happy with native stacks or a cross-platform framework such as Flutter or React Native; code quality and maintainability matter more than language choice. Please outline your proposed architecture, timeline to first test build, and any similar apps you have shipped so I can see how you tackle UI, latency, and security.