pascobrain/illustrachat-ai-powered-conversational-canvas ? reverse-engineered prompt

Build me a modern AI chat app called Illustrachat that runs on Cloudflare and feels fast and polished.

I want a chat interface where users can start new conversations, come back to old ones later, rename sessions, and see their recent activity. The assistant should stream responses as they come in instead of waiting for the whole answer, and it should support useful tools like weather lookups and web search when someone asks natural questions. If possible, make it ready for model context protocol servers too.

Use a clean React frontend with a nice sidebar and a simple, friendly layout, and keep the backend working with Cloudflare Workers and durable storage so conversations persist. Please wire up the basic API routes for health, sessions, chat, and message history, and make it easy to run locally and deploy to Cloudflare. If you need to check current docs for any Cloudflare or AI details, go ahead and look them up online.