Sounds as if it might be a little of both to me, in other words, a mixed episode.

Apathy can be an indication of strong depression and it can be, also, disinterest in criticism---but then, that's indifference which is the withdrawal of emotion. I wonder how your psychiatrist would view that.

If it's hypomanic when you went shopping at that time of night, it was short-lived for an attack of hypomania.

I think you may still have some depression (maybe it's unconscious, but I think it
might be there). I'm not a doctor, though, so I'd talk to my psychiatrist about this one, maybe.

I've been told by a psychiatrist that mania (in your case hypomania) is a reaction to depression. Whether that's relevant in this instance is debatable, but the shopping was very short and uplifting for you.

Take care of yourself, please.