block/berd ? reverse-engineered prompt

Build me a desktop app for working with AI agents, something like a clean workspace where I can connect to different models and get real work done. It should run as a desktop app, feel polished, and use a modern web based UI with a fast native shell.

I want it to talk to an AI backend through a local sidecar, so the app can stay self contained and easy to run. Make the setup simple, with a normal dev command and a bundle flow that packages the backend with the app for distribution. Keep it open source friendly, with a public build that does not depend on private services, but leave room for enterprise specific settings or extra tools later.

Please wire up the main app flow, basic state handling, and whatever screens are needed so I can launch it, connect an agent backend, and start using it right away. Look up current docs online if you need to.