Get a flow

ProviderInfo is the branding subset exposed in the flow response. Mirrors public catalog fields only; auth/proxy stay server-side.

UIContainer is the top-level form payload for a flow step. Matches kratos/ui/container.Container plus a Hekate-only Headline used by strategies that want to override the renderer's default per-step title (e.g. an option-picker step that wants "Select your account type" instead of "Connect <Provider>").