smayankthakur/tdt-v1 — reverse-engineered prompt

I want you to take this repo and finish it into a usable web app instead of the default starter page. Please inspect the existing files first, especially the app code, docs, TODO, paywall and subscription notes, then build what the project is clearly trying to be without adding random unrelated features. Make the home page feel polished, with a clear value proposition, sign in or get started flow if the existing code supports it, a clean dashboard or protected area, and sensible empty states. If there are subscription or paywall pieces already started, wire them up enough that the user experience makes sense, but keep it simple and safe.

Please clean up obvious broken code, make the styling consistent, handle loading and error states, and make sure it runs locally with npm run dev. Use the current Next.js docs online if you need to. Leave notes for any environment variables or services I still need to configure.