Awesome work, I've developed my own projects which are fairly similar to this. I would say that the auto router is the most important aspect for this to work well, and unfortunately one of the most complex areas :)

The only minor complaint is that the wires / nets / traces are also components themselves. JSX can only build tree structures but wires turn circuits into graphs, so for those I would have used plain js classes or hooks like useWire and then pass the + and - into the components. That gives you the added benefit of warning when you haven't wired up a component fully. Also allows for required and optional wire inputs on components.