sinayanaik/recall ? reverse-engineered prompt

Build me a static flashcard and study notes web app that runs as a normal website, but also works offline after the first sign in. I want it backed by my own Supabase project, with user accounts, synced decks, images, and local storage so the app still opens without a connection once it has been used.

The app should feel like a simple study tool where I can create decks, add cards, write notes, review them, and see my progress. It should support rich card formatting, cloze style cards, quick notes, keyboard shortcuts, swipe gestures, and a full help and guide section inside the app. Please make it installable like a PWA, with a service worker and offline caching, and keep the setup easy so I can just serve the folder over HTTP and connect my Supabase URL and key.

If you need anything unclear, look up current docs online.