Hi,
Okay, with both your nitrates and your ammonia up, that indicates an overabundance of nutrients in the water. In other words, some extra vacuuming is needed. This could also be feeding that hair algae along with the temps in the upper range.
Try to get your temps down a little bit, get rid of that algae which short of scrubbing that tank out may prove difficult to do. Even if your tank is not directly in front of a window, it may be getting light from somewhere. I know your temps are still in the normal range, but with that stubborn algae, lowering the temps will help. Move your ornaments around to make sure you've vacuumed everything up.
What kind of substrate do you have? Large rocks are notorious for holding gunk, no matter how thorough you think you have been. If you have sand, it should be easy enough to clean.
As far as salt baths, unless you see fungus form on that wound, I don't think they'll be necessary. Just keep her in the fridge until you get your tank back under control and keep an eye on that spot.
If anything changes with her, please post.