zaviergpt/stash ? reverse-engineered prompt

Build me a simple decentralized storage app called Stash.

I want users to be able to upload a file, see it saved across the network, and get it back later with a shareable link or file ID. Make it feel like a real working prototype, with a small web client for uploading and browsing files, plus a backend that handles storing and fetching data. If it helps, create a basic local storage flow first, but keep the code organized so it could grow into a real decentralized system.

Please make the interface clean and easy to use, show clear success and error states, and include the basic pages or screens someone would expect for uploading, listing, and downloading files. Use the existing project structure if it makes sense, and look up current docs online if you need to.