Ark Navigation tutorials

The tutorials grow one concept at a time while preserving the same ownership model:

1. build and run one typed route with a typed result;
2. add authentication Redirect and authorization Guard;
3. compose feature Modules into nested tab Scopes;
4. install and remove a Module through a Runtime transaction.

Each tutorial links to a complete source file. The text explains the invocation point, ownership boundary, and observable stack result rather than presenting disconnected API fragments.