Pharmacy DMS & Billing Suite

I need a full-stack Pharmacy / Ayurvedic medicine distributor management system built from scratch, not just a mock-up. The reference screenshots (I will share once we start) outline every screen and workflow I want; your job is to turn that vision into a production-ready web app with a clean, modern, responsive interface that adapts smoothly on desktop, laptop, Android mobiles and tablets. Core requirements • Secure user authentication must rely on a standard Email and Password flow. • Back-end data will live in PostgreSQL, so design your schema and queries accordingly. • The inventory module has to cover: - Stock tracking - Reorder alerts - Batch and expiry management Beyond that, the platform must support complete CRUD for products, customers, suppliers and users; GST-compliant billing; purchase and sales returns; detailed reports (stock, profit & loss, tax, outstanding payments); and basic accounting ledgers. Smooth navigation and fast load times are essential. Acceptance criteria 1. Fully responsive UI that mirrors the shared screenshots. 2. Role-based access control with hashed passwords. 3. All listed inventory functions demonstrably working. 4. Invoices, receipts and reports exportable to PDF/Excel. 5. Clear setup instructions and a one-click seed script to populate sample data. Please develop with the tech stack you are most productive in (React, Vue, Angular, Django, Laravel, Node, etc.) provided it integrates cleanly with PostgreSQL and follows best practices. Hand over well-commented source code in a public or private repo plus a short video walkthrough of the finished system. Build a complete, production-ready Pharmacy / Ayurvedic Medicine Distributor Management & Billing Software based on the feature list shown in the reference screenshots. The software should have a clean, modern, responsive UI that works on: - Desktop - Laptop - Android mobile - Tablet Do NOT create only a static UI. Implement the complete working frontend + backend + database with authentication, CRUD operations, reports, billing, inventory and accounting. Build the project in a modular architecture so additional features such as WhatsApp ordering, barcode printing, multi-branch inventory, doctor management and mobile app integration can be added later.