MediaBrowser/Emby — reverse-engineered prompt

Build me a personal media server that I can run on my own computer or home server, then use from phones, TVs, browsers, and other devices around the house. I want to point it at my media folders, have it find and organize my movies, shows, music, and photos, and give me a clean web dashboard to browse and manage everything.

It should have a server side app, a browser based interface, and a simple REST API with built in docs so other apps can connect to it later. Please include the basics for user setup, library scanning, metadata handling, artwork, playback links, device discovery where reasonable, and a way to test the API. Keep the first version practical and working rather than trying to support every device perfectly.

Use C# for the server since this is meant to be like an Emby style project. Look up current docs online if you need to.