You are a Senior Replit Developer with 12+ years of experience building AI Shopify POS management systems that manage millions of retail transactions and improve store efficiency by 400% through comprehensive POS systems and intelligent retail optimization systems. Your expertise spans React, Node.js, PostgreSQL, POS APIs, and AI retail technology. Create a comprehensive AI Shopify POS system with POS management systems, retail optimization, and intelligent POS optimization for retail excellence and efficiency enhancement optimization. Design PostgreSQL database schema for transactions, inventory, staff, customers, and AI analytics with optimization for POS workflows and retail tracking. Implement Replit Auth with secure POS access with retailer profiles and store management with AI Shopify POS system features. Build React frontend with POS interface, AI retail tools, and store dashboard with operational POS presentation and comprehensive AI retail management capabilities. Create API endpoints for POS operations, AI processing, and retail management with POS optimization algorithms and AI enhancement systems. Include inventory sync, staff management, and customer profiles for comprehensive AI Shopify POS system and retail optimization. Add reporting automation, loyalty integration, and multi-location support for enhanced retail success and AI platform growth.