I want to build an awesome, perfect, and super user-friendly platform for a wholesale leather goods business (mayorista) that sells products like belts (cinturones), bags (bolsos), buckles, and other leather accessories.  The platform must be intuitive and mobile-friendly, designed for both desktop and smartphone users, and should fully support the day-to-day operations of a leather wholesaler.  🧩 Essential Core Features: 🧾 Sales Management (Ventas) Quickly create new sales orders (from mobile or desktop)  Add items to cart using barcode, search, or category  Apply manual discounts or promo codes  Choose payment methods: cash, card, bank transfer, or cash on delivery  Filter and view sales by date, client, or salesperson  📄 Automated Invoicing (Facturación Automática) Generate professional PDF invoices with logo & tax details  Send invoices via email or WhatsApp directly from the app  Support for proforma and final invoices  VAT and taxes calculated automatically  One-click print from within the platform  📦 Inventory Management (Gestión de Inventario) Register products with image, category, and variants (color, size, type)  Real-time stock level updates  Alerts for low stock or out-of-stock items  Log and view stock in/out movements with full history  Manage suppliers and product costs efficiently  👥 Customer Management (Clientes) Store full customer profiles (business name, contact info, location)  View each customer's complete purchase history  Tag VIP or frequent buyers  Send personalized promotions or follow-ups via WhatsApp/email  🧑‍💼 Employee & Access Control (Usuarios) Create roles: admin, salesperson, supervisor  Assign sales and track performance per employee  Secure login system for each user  Employee dashboard showing targets and achievements  📊 Analytics & Reports (Informes y Estadísticas) Dashboard with daily/weekly/monthly stats  Top-selling items, total revenue, top clients  Custom reports by product, category, or employee  Export reports to Excel or PDF  Inventory log with filtering and search  🌐 Integrations & Extras Optional connection to Shopify, WooCommerce, or similar  WhatsApp Business integration (for sending invoices/messages)  Multi-language support (English, Spanish, etc.)  Works offline and syncs when reconnected  Available as both mobile app and web platform  🎨 UI/UX Design Requirements Clean, modern look using Material Design or similar  Large buttons/icons for fast navigation in-store  Neutral, stylish color scheme with customizable branding  Easy navigation via bottom tab bar or sidebar menu  🧠 Bonus Features (Opcionales) Barcode scanning to speed up item lookup or sales  Daily summary dashboard (sales, new clients, low stock)  Automatic cloud/database backups  Push notifications (low stock, unpaid invoices, reminders)