KotatsuApp/Kotatsu — reverse-engineered prompt

Build me a free and open source Android manga reader like Kotatsu. I want users to browse online manga sources, search by title, genre, and filters, open a manga page, read chapters in a clean reader, and switch between normal pages and a webtoon style reader.

Please include favorites with custom categories, reading history, bookmarks, incognito mode, downloads for offline reading, and support for importing CBZ archives. Add an updates feed with notifications for new chapters, plus recommendations that can be filtered. It should have a polished Material You style interface that works well on phones, tablets, and larger screens, and still support Android 6.0 and newer.

Also add optional tracking logins for Shikimori, AniList, MyAnimeList, and Kitsu, app lock with password or fingerprint, and syncing user data across devices on the same account. The app should not host manga itself, only browse content from online sources. Look up current Android docs online if you need to.