prasannpratik/VERTEX_SIH_2026 ? reverse-engineered prompt

Build me a web app called VERTEX for 3D urban property identification and spatial management.

I want a simple frontend that can show a building in 3D, list its floors and units, and let me click into a property to see its details. It should connect to a backend API that can upload a GeoJSON file, normalize the data into buildings, floors, representative units, and infrastructure, and run basic validation on the geometry. Please include endpoints for health, buildings, properties, search by ULPIN, and upload and validation. I also want a few demo datasets so I can test the flow right away, plus a Swagger page for the API.

Keep it as a prototype, not a full production system. It’s fine to use the prepared sample data and simple representative unit boundaries, just make the experience smooth and easy to run locally. If you need to check current docs for anything, look them up online.