May I throw in my take on a review summary page as well?
Available at https://wksummary.ale.sh/
Detailed instructions: https://community.wanikani.com/t/updates-to-lessons-reviews-and-extra-study-are-live/61049/399?u=notpushkin
Edit (Apr 27): aaaaand it’s broken. Looks like API has stopped returning reviews: https://community.wanikani.com/t/api-changes-get-all-reviews/61617
:-(