- [X] Sleep screen tweaks
- [ ] Better home screen (covers/recents)
- [ ] Firmware flashing screen
- [X] Process/render all covers/thumbs when opening book for first time
- [ ] Companion Android app
    - [ ] Smart fill letterbox
- [X] Bookmark skeleton
- [X] Dictionary skeleton
- [ ] Quick menu
    - [X] Bookmarks
    - [X] Dictionary
    - [X] Rotate screen
    - [ ] Archive/Delete book

Optional?
- [ ] Device bezel offsets