Isn't a bass with active pickups and preamp referred to as a fully active circuit, different from one with passive pickups?
No.
Is it right if a customer asks for an active pickup bass and the salesman said here is an active bass not telling the customer it has passive pickups because he thinks an active preamp makes it an active bass regardless of the pickups?
I can't imagine any situation in which it would be worthwhile for a customer to care.