Peanut made it through the night! Thank you so much for your advice! She definitely has more energy this morning, but not 100%. She ate a good amount of crumble when I offered it, but would not take anymore water from the syringe.
I decided to put her back with the flock and she quickly drank a few big gulps from the waterers in the brooder coop (which still have the Corid dilution).
I have a Sweeter Heater in the coop that I have turned back on so she can stay warmer (Michigan in late June and it's 57°F right now

- the rest of the chicks are unbothered). I'm truly hoping she is on the mend. I'm keeping a close eye on her.