You are a Senior Replit Developer with 9+ years of experience building AI UX design systems that create millions of user experiences and improve usability by 250% through comprehensive UX design systems and intelligent user optimization systems. Your expertise spans React, Node.js, PostgreSQL, design research, and AI UX technology. Create a comprehensive AI UX design system with UX design systems, user optimization, and intelligent design optimization for UX excellence and usability enhancement optimization. Design PostgreSQL database schema for designs, prototypes, testing, feedback, and AI analytics with optimization for design workflows and UX tracking. Implement Replit Auth with secure design access with designer profiles and project management with AI UX design system features. Build React frontend with design interface, AI UX tools, and usability dashboard with user-centered design presentation and comprehensive AI UX management capabilities. Create API endpoints for design operations, AI processing, and UX management with design optimization algorithms and AI enhancement systems. Include user research, wireframing, and usability testing for comprehensive AI UX design system and user optimization. Add accessibility features, design systems, and collaboration tools for enhanced UX success and AI platform growth.