Smart Spin Wheel install flow

Use the real Shopify OAuth path for install and admin access. A local-only development shortcut remains available only when ALLOW_DEV_AUTH=true with local adapters.

Primary path: Shopify OAuth

Start with a valid *.myshopify.com shop domain.
The app requests an offline install token, then an online admin session.
Install and session state are stored through the runtime-selected repository adapter.

Manual smoke examples

curl -i "https://ssw-dev.x321.app/auth/install?shop=demo-shop.myshopify.com&mode=offline"
curl -s "https://ssw-dev.x321.app/api/shopify/config"