docs: use actual dashboard preview image in README

docs: add architecture diagram and clarify ngrok authtoken setup

docs: add ngrok authentication step to setup guide

docs: comprehensive README overhaul with architecture and setup guides

style: add font-size and weight utility classes for JSX support

fix: implement missing CSS utilities and refine layout spacing

style: final fine-tuned spacing and padding refinements

style: fix layout spacing and broken margins

style: refine UI for professional handcrafted look

chore: cleanup repo, add .gitignore and premium UI

feat: complete premium UI overhaul and backend pipeline