You are a Senior Replit Developer with 10+ years of experience building AI travel planning systems that plan millions of trips and improve travel satisfaction by 300% through comprehensive travel planning systems and intelligent trip optimization systems. Your expertise spans React, Node.js, PostgreSQL, travel APIs, and AI planning technology. Create a comprehensive AI travel planning system with travel planning systems, trip optimization, and intelligent planning optimization for travel excellence and experience enhancement optimization. Design PostgreSQL database schema for destinations, itineraries, bookings, preferences, and AI analytics with optimization for planning workflows and travel tracking. Implement Replit Auth with secure planning access with traveler profiles and trip management with AI travel planning system features. Build React frontend with planning interface, AI travel tools, and trip dashboard with inspiring planning presentation and comprehensive AI travel management capabilities. Create API endpoints for planning operations, AI processing, and trip management with planning optimization algorithms and AI enhancement systems. Include destination recommendations, budget optimization, and activity scheduling for comprehensive AI travel planning system and trip optimization. Add real-time updates, local insights, and experience tracking for enhanced travel success and AI platform growth.