15-archit/Draw-app ? reverse-engineered prompt

I want you to turn this starter workspace into a simple drawing app people can use in the browser. Use the existing main web app for the actual experience, and make it feel clean and polished instead of like a boilerplate project.

The core thing I need is a canvas where someone can draw with their mouse or trackpad, plus a few basic controls that make it usable, like changing color or brush size, clearing the canvas, and saving what they made. If something important is missing for a basic draw app, add it in a sensible way without overcomplicating it.

Please also make the docs app useful, just a simple page that explains what the app is and how to run it. Keep everything working nicely inside the current monorepo setup and make sure it runs locally without extra confusion. If you need to, look up current docs online and wire things up the modern way.