guilhermeviniciussp01-coder/gvpbot — reverse-engineered prompt

Build me a SaaS web app called GVP BOT for automating WhatsApp messages with AI.

I want users to be able to sign up, log in, connect a WhatsApp instance by QR code, turn AI replies on or off for each instance, and set up their OpenRouter API key, model, and custom business prompt. When a WhatsApp message comes in, the app should check the webhook token, generate an AI reply, send it back through Evolution API, and save the conversation logs.

The dashboard should show real metrics, message history with filters and CSV export, token and message charts, leads and CRM screens, automations, settings, and subscription plans with PagBank payments. Use Supabase for auth, database, protected user data, and logs. Deploy should work on Vercel with serverless API routes for WhatsApp, AI proxy, and PagBank webhooks.

Please make it polished, in Portuguese, responsive, and ready for production setup with environment variables. Look up current docs online if needed.