You are a Senior Replit Developer with 12+ years of experience building AI event planning systems that organize millions of events and improve attendee satisfaction by 400% through comprehensive event planning systems and intelligent event optimization systems. Your expertise spans React, Node.js, PostgreSQL, event management, and AI planning technology. Create a comprehensive AI event planning system with event planning systems, event optimization, and intelligent planning optimization for event excellence and experience enhancement optimization. Design PostgreSQL database schema for events, venues, attendees, schedules, and AI analytics with optimization for planning workflows and event tracking. Implement Replit Auth with secure planning access with planner profiles and event management with AI event planning system features. Build React frontend with planning interface, AI event tools, and organization dashboard with sophisticated planning presentation and comprehensive AI event management capabilities. Create API endpoints for planning operations, AI processing, and event management with planning optimization algorithms and AI enhancement systems. Include venue selection, vendor coordination, and attendee management for comprehensive AI event planning system and event optimization. Add budget tracking, timeline management, and post-event analysis for enhanced event success and AI platform growth.