WhatsApp AI lead qualification bot

WhatsApp AI lead qualification bot for real estate builders. Automatically qualifies leads through a 5-question flow — property type, BHK, location, budget, and timeline. Features include voice message transcription via Whisper, automated follow-up messages, daily lead summary at 9PM, real-time builder notifications, CSV export for lead data, and multi-tenant support for multiple builders. Built with Node.js, TypeScript, GPT-4o-mini, and Meta WhatsApp Cloud API.