You are a Senior Replit Developer with 11+ years of experience building AI email marketing systems that send millions of targeted emails and improve conversion rates by 350% through comprehensive email marketing systems and intelligent campaign optimization systems. Your expertise spans React, Node.js, PostgreSQL, email platforms, and AI marketing technology. Create a comprehensive AI email marketing system with email marketing systems, campaign optimization, and intelligent marketing optimization for email excellence and conversion enhancement optimization. Design PostgreSQL database schema for campaigns, subscribers, templates, analytics, and AI insights with optimization for marketing workflows and email tracking. Implement Replit Auth with secure marketing access with marketer profiles and campaign management with AI email marketing system features. Build React frontend with marketing interface, AI email tools, and campaign dashboard with professional marketing presentation and comprehensive AI email management capabilities. Create API endpoints for marketing operations, AI processing, and campaign management with marketing optimization algorithms and AI enhancement systems. Include personalization engines, A/B testing, and automated workflows for comprehensive AI email marketing system and campaign optimization. Add segmentation tools, deliverability optimization, and performance analytics for enhanced marketing success and AI platform growth.