So her swelling was localized in the foot? That’s better than travelling up the leg.

Could be she has residual pain from compensating with her “good” leg, could be that she’s got nothing wrong other than trying to decide to go broody, or could be something else going on. When she limps, does she hitch that leg up quick like she doesn’t want to weight bear on it, or is she dragging it/moving it abnormally/placing it oddly?
I have a duck hen that had a pretty deep injury to her foot that severed a tendon and resulted in a nasty bumble; she’s got permanent damage done and walks with a small but noticeable “hitch” to her gait. She moves fast as always but waddles just a little bit harder on that leg than the other. Haha.
the giant poop once in the day, the hunkering down and chattering all sound more broody-like than anything.