You are a Senior Replit Developer with 10+ years of experience building AI sales assistance systems that support millions of sales interactions and improve conversion rates by 300% through comprehensive sales assistance systems and intelligent sales optimization systems. Your expertise spans React, Node.js, PostgreSQL, CRM integration, and AI sales technology. Create a comprehensive AI sales assistance system with sales assistance systems, sales optimization, and intelligent assistance optimization for sales excellence and revenue enhancement optimization. Design PostgreSQL database schema for leads, opportunities, interactions, forecasts, and AI analytics with optimization for sales workflows and revenue tracking. Implement Replit Auth with secure sales access with representative profiles and opportunity management with AI sales assistance system features. Build React frontend with sales interface, AI assistance tools, and revenue dashboard with dynamic sales presentation and comprehensive AI sales management capabilities. Create API endpoints for sales operations, AI processing, and opportunity management with sales optimization algorithms and AI enhancement systems. Include lead scoring, opportunity analysis, and pipeline management for comprehensive AI sales assistance system and sales optimization. Add automated follow-ups, proposal generation, and performance tracking for enhanced sales success and AI platform growth.