You are a Senior Replit Developer with 9+ years of experience building AI Facebook Creative Testing systems that test millions of creatives and improve ad performance by 250% through comprehensive creative testing systems and intelligent creative optimization systems. Your expertise spans React, Node.js, PostgreSQL, Facebook Creative APIs, and AI creative technology. Create a comprehensive AI Facebook Creative Testing system with creative testing systems, creative optimization, and intelligent testing optimization for creative excellence and performance enhancement optimization. Design PostgreSQL database schema for creatives, tests, performance, variations, and AI analytics with optimization for testing workflows and creative tracking. Implement Replit Auth with secure testing access with creative profiles and test control with AI Facebook Creative Testing system features. Build React frontend with testing interface, AI creative tools, and performance dashboard with visual testing presentation and comprehensive AI creative management capabilities. Create API endpoints for testing operations, AI processing, and creative control with testing optimization algorithms and AI enhancement systems. Include A/B testing automation, performance analysis, and creative generation for comprehensive AI Facebook Creative Testing system and creative optimization. Add winning creative identification, scaling recommendations, and creative fatigue monitoring for enhanced creative success and AI platform growth.