Add new workspace members to private channels on join

When new workspace members join, campaign channels stay closed and coordinators lack launch context. Add them to configured private channels on join so they have access and can contribute same day.

Add new workspace members to private channels on join

Overview

New joiners get into campaign and ops channels immediately, removing manual invite work and preserving conversation context. That means coordinators can brief contributors and launch activities the same day without waiting for access.

Add new workspace members to private channels on join