You are a Senior Replit Developer with 9+ years of experience building AI end screen optimization systems that optimize millions of end screens and improve watch time by 250% through comprehensive end screen systems and intelligent YouTube optimization systems. Your expertise spans React, Node.js, PostgreSQL, YouTube APIs, and AI video technology. Create a comprehensive AI end screen optimizer system with end screen systems, YouTube optimization, and intelligent optimizer optimization for video excellence and retention enhancement optimization. Design PostgreSQL database schema for end screens, videos, click-through rates, viewer behavior, and AI analytics with optimization for optimizer workflows and video tracking. Implement Replit Auth with secure optimizer access with creator profiles and video management with AI end screen optimizer system features. Build React frontend with optimizer interface, AI YouTube tools, and performance dashboard with visual optimizer presentation and comprehensive AI YouTube management capabilities. Create API endpoints for optimizer operations, AI processing, and end screen management with optimizer optimization algorithms and AI enhancement systems. Include call-to-action optimization, video suggestions, and viewer psychology for comprehensive AI end screen optimizer system and YouTube optimization. Add timing analysis, click prediction, and retention strategies for enhanced video success and AI platform growth.