Add recreation guide

Fix device registration logic, case-insensitive MAC matching, and add RSSI header to firmware

Force enable device registration in production environment

Allow user to register new device by MAC address

Update device registration UI and default env var

Fix missing Sparkles import

Refine getBaseUrl to check VERCEL_URL

Fix auth redirect URL to use production domain

Configure ESP32 firmware for production with Vercel and Deno Deploy

Add env variable debugging for Deno Deploy

Fix Stripe optional configuration for build

Initial commit - ElatoAI production setup