Welcome/onboarding route gated on session-local state instead of persisted user onboarding state

A web app welcome/onboarding page was shown based on a stale auth session field and a browser localStorage fallback. Users who had already registered an agent outside the wizard, or whose session payload did not reflect a prior skip/completion, could still be redirected to the welcome page. The intended behavior was to show the page only while the user had neither registered an agent nor skipped/completed the welcome flow.