Clears the last CS0246/CS0234 type frontier; per F3 this unmasks the AI-subsystem
member bodies (~9k member-level errors) -- next grind is extension copies + god-object
member growth.
Resolves the 268-error header frontier: settings Item base, ErrorDialog.Data,
RoomConnectController nested types, Unity asset/light/collider types, CriWare/
CodeStage/Spine SDK surface, and copies INetworkLogger + SingletonMonoBehaviour
verbatim. Per F3 this unmasks the type bodies (~26.5k member-level errors now
visible) -- the real M1 bulk, attacked in following waves.