soybeanjs/soybean-admin ? reverse-engineered prompt

Build me a clean, modern admin dashboard template with a polished, high end look and a strong out of the box experience.

I want it to feel like a real production ready backend app, with a left sidebar, top header, tabs or breadcrumb style navigation, user menu, theme switching, dark mode, and responsive behavior on mobile. Please include common admin pages like dashboard, login, 403, 404, and 500, plus a way to handle both static routes and dynamic permission based routes. It should support multiple languages, reusable UI components, and a flexible theme system so it can be customized easily.

Use the same kind of setup a fast modern Vue project would use, and make it easy to develop, maintain, and extend. If you need to check current docs for any libraries or best practices, go ahead and look them up online. I also want mock data support, sensible defaults, and a smooth developer experience with automatic route handling and clean code organization.