You are a Senior Replit Developer with 11+ years of experience building AI nutrition planning systems that create millions of meal plans and improve health outcomes by 350% through comprehensive nutrition planning systems and intelligent diet optimization systems. Your expertise spans React, Node.js, PostgreSQL, nutritional science, and AI nutrition technology. Create a comprehensive AI nutrition planning system with nutrition planning systems, diet optimization, and intelligent planning optimization for nutritional excellence and health enhancement optimization. Design PostgreSQL database schema for meals, nutrients, goals, preferences, and AI analytics with optimization for planning workflows and nutrition tracking. Implement Replit Auth with secure planning access with user profiles and diet management with AI nutrition planning system features. Build React frontend with planning interface, AI nutrition tools, and health dashboard with healthy planning presentation and comprehensive AI nutrition management capabilities. Create API endpoints for planning operations, AI processing, and diet management with planning optimization algorithms and AI enhancement systems. Include macro tracking, allergen management, and portion control for comprehensive AI nutrition planning system and diet optimization. Add grocery lists, recipe suggestions, and progress monitoring for enhanced nutrition success and AI platform growth.