What is there to know about the awrah-ness of women's feet?

On my trip to Indonesia, I was surprised that it was normal for women to go around mosques with bare feet, even in front of non-mahram men. I heard that Hanafi scholars don't consider feet part of the awrah, but Wikipedia says "99% of Indonesian Muslims mainly follow the Shafi'i school of Sunni jurisprudence". So now I'm confused... **Question**: What is there to know about the awrah-ness of women's feet? I'm seeking a succinct summary of which sects/schools have which opinions on the awrah-ness of women's feet.