"Shoujo Ai" is a nonsense word made up by Western fans, to mirror "Shounen Ai". It is not used in Japan by either fans or creators. Everything from pure wholesome fluff to erotica is just 百合 (Yuri), and it works perfectly fine because the erotica will be tagged with something like "R18" anyway.
Compare Twitter search results for
少女愛 ("Shoujo Ai") with
百合 (Yuri),
百合漫画 (Yuri manga). Works published in
Yuri Hime range from wholesome to erotica, and they're all just referred to as Yuri. Same goes for ComicWalker's
Yuri tag.
If a work is not tagged with 'R18', 'Adult Only', 'Erotica' or something similar, anyone should be able to guess that it's not going to be porn. The idea that we should use different words for wholesome and erotic Yuri is simply absurd.