Oh my gosh, this is incredible! You did an amazing job here, I never thought I would see Juice as a webapp! Do you mind if I share this out to a larger audience?
Of course, feel free to! The source is fully published on GitHub, and if you click the "Juice" button at the top left of the app it links to the repo with the code. Feel free to contact me on Discord (my id: curlyquote) if you want to chat about it, and I'd be glad to make whatever fixes/improvements to the app (and maybe we could coordinate publishing it to Android/iOS stores for free, too)