The difference is that you are doing something like the "take right action without resistance" approach that I've encountered before in Buddhism, which matches up nicely with anhedonia (personally I am a hedonist, so this does not work for me);

That is interesting - you correctly predicted I was exposed to Buddhism (indeed practiced it for years, although this non-forced-action, wu-wei is from my earlier exposure to Taoism.

But it has nothing to do with anhedonia! First of all anhedonia is not enjoying stuff, not not wanting to enjoy stuff. It is not a choice or attitude, it is the illness. If you have or used to have depression you had it too - it is rather part of the definition itself. Second, if anything, the attitude I gleaned from Buddhism was very optimistic about fun and joy, my teacher is almost extremely hedonistic. This has more to do with my parents being blue-collar, and my cultural background is Mitteleuropa - I tried to hint on that with "shut up and soldier on", it is a direct translation from "Maul halten und weiter dienen" (BTW my first language is not German but this saying describes the region rather well). Basically this is what you get from blue-collar parents. Don't like your job? Shut up, you have a family to support. Soldier on. And so on.

Finally, do you think wu-wei prevents hedonism? I think if enjoyment means resting effortlessly in the here and now instead of hoping for or worrying about something in the future, it is more like a precondition for it.