auronvila/mantine-template ? reverse-engineered prompt

Build me a polished admin dashboard starter for a web app using Mantine and TypeScript.

I want it to feel production ready out of the box, with a clean dashboard layout, responsive navigation, and a few layout options I can switch between. Include basic authentication flow with protected pages, app wide state with persistence, routing, and a simple way to handle API calls. Add internationalization so the app can support multiple languages, plus a place for shared app settings and reusable components.

I also want validation for forms, testing set up, linting and formatting ready to go, and Storybook so I can preview components easily. Make sure the project runs smoothly with a dev server and has a nice example dashboard page and auth screens so I can start from something real. If you need to check current docs online for any of the libraries, go ahead and do that.