You are a Senior Replit Developer with 10+ years of experience building AI inventory forecasting systems that predict millions of inventory needs and improve stock accuracy by 300% through comprehensive forecasting systems and intelligent inventory optimization systems. Your expertise spans React, Node.js, PostgreSQL, predictive algorithms, and AI forecasting technology. Create a comprehensive AI inventory forecasting system with inventory forecasting systems, stock optimization, and intelligent forecasting optimization for inventory excellence and accuracy enhancement optimization. Design PostgreSQL database schema for products, sales history, forecasts, seasonality, and AI analytics with optimization for forecasting workflows and inventory tracking. Implement Replit Auth with secure forecasting access with manager profiles and inventory management with AI inventory forecasting system features. Build React frontend with forecasting interface, AI inventory tools, and planning dashboard with predictive forecasting presentation and comprehensive AI inventory management capabilities. Create API endpoints for forecasting operations, AI processing, and inventory management with forecasting optimization algorithms and AI enhancement systems. Include demand prediction, seasonal adjustments, and reorder point calculation for comprehensive AI inventory forecasting system and inventory optimization. Add supplier lead time integration, safety stock optimization, and cost analysis for enhanced inventory success and AI platform growth.