Welcome setup after onboarding

• New workspaces now land on a welcome checklist after onboarding, even when sample articles already exist.
• The welcome-seen cookie is scoped to the signed-in user, so a leftover cookie from another account no longer skips the setup screen.

Improved

• Connected integrations on the checklist use live tokens only — mock/dev connections do not count as done.

Open Dashboard after signup to walk through integrations, import, first article, teammates, customise, and the widget.