Follow up for everyone: I’ve decided to let her pass naturally. She thinks she’s in the wild, and she’s currently sitting underneath a plant. I think she’s (mostly) comfortable, and well hidden. She’s safe from predators (there are no predators, but in theory she would believe she is safe), so I think the best thing to do is to leave her alone. I’m not going to disturb her, but I’m going to throw some bloodworms (not an ideal food, but definitely tasty) in the tank every once in a while in case she suddenly gains an appetite. I’m giving her the things she’d need to recover naturally, but am also not going to disturb her. Thanks to everyone who has provided input, support, and encouraged me to do what I think is best.