You are technically correct, the best kind of correct. The larger, older zip was not correct so I have deleted it and it's arm64 partner. What is left are the correct zips. Thanks for reminding me 🤘
Unfortunately you can't install these without either root or a custom recovery. Unfortunately you have neither. Have you considered flashing TWRP and a custom ROM? They're good for what ails ya, namely YuckShiz and its Fisher-Price styling.
Unfortunately no, Keep doesn't have a built in dark theme. Go_Ogle doesn't believe in giving users what they want. They much prefer to blind us all with their horrible white UIs. Just horrendous.