Seems she's doing quite well. The white spots are carpet debris. I got a glass of warm water and attempted to rinse her, a kindness not appreciated.
She crawled away behind a potted plant in regal and insulted fashion, and I decided to leave her alone.
There's something mystical but fragile about these creatures, I think.
(I have since learned she is an Ensatina, a type of lungless salamander that exudes a toxic substance from her/his tail)