Specifically about the chángshān seen in this character design from a Chinese game – note how the black one has clasps going down the left side of the garb rather than the right. Does this carry any connotations similar to closing a kimono right-over-left?

Both are names for the fruit of either Lycium chinense or L. barbarum. The practitioners in my office recommend them sometimes. (I'm a receptionist in an acupuncture clinic.) I'm sure I've tasted them dried, but the memory doesn't stand out. Just kinda vaguely tart-sweet, I guess? But don't trust my memory here.

I'm not familiar with osmanthus, but I'd try osmanthus tea in a heartbeat if I came across it. Apparently the flowers smell like apricots or ripe peaches. Sounds nice!

~Neshomeh