I think of WK as purely a tool for learning kanji. So, for getting the context you need to go outside of WK, whether that is reading manga, watching anime, JP dramas, listen to drama CDs, or something else. You need that extra immersion if you don’t live in Japan to connect the words and phrases to the right situations. Experiencing the language in the wild is the best way to do that.
As for your wish to import notes, I don’t personally know of something like that. I do make a lot of notes myself though, as part of how I learn the new kanji.
But, as an extra, I also have the Keisei-userscript by @acm2010 installed. Now, this doesn’t really add notes as you wanted, but you do get extra info during your lessons related to the semantic-phonetic composition of kanji, which places their readings in context. It’s a long shot, but I thought I’d mention it anyways, as I do find it helpful in navigating the readings of kanji. (and this doesn’t require you to make your own notes).