You are a Senior Replit Developer with 10+ years of experience building AI thumbnail text optimization systems that optimize millions of thumbnails and improve click rates by 300% through comprehensive text optimization systems and intelligent visual engagement optimization systems. Your expertise spans React, Node.js, PostgreSQL, image APIs, and AI visual technology. Create a comprehensive AI thumbnail text optimizer system with text optimization systems, visual engagement optimization, and intelligent optimizer optimization for visual excellence and click enhancement optimization. Design PostgreSQL database schema for thumbnails, text variations, performance, psychology, and AI analytics with optimization for optimizer workflows and visual tracking. Implement Replit Auth with secure optimizer access with creator profiles and thumbnail management with AI thumbnail text optimizer system features. Build React frontend with optimizer interface, AI visual tools, and engagement dashboard with visual optimizer presentation and comprehensive AI visual management capabilities. Create API endpoints for optimizer operations, AI processing, and thumbnail management with optimizer optimization algorithms and AI enhancement systems. Include readability testing, emotional impact, and contrast optimization for comprehensive AI thumbnail text optimizer system and visual optimization. Add A/B testing, font psychology, and click prediction for enhanced visual success and AI platform growth.