Cover view is substantially ready.
This is an alternative for the dropdown menu, so tap on a cover to open the comic.
I'm thinking about adding a middle step: tap on a cover to zoom it then tap again to open or tap on the background to return to cover view.
Covers are automatically made when running Komic using ImageMagick command line.
They are autoscaled keeping the size ratio and then lightened to avoid ultra-slow scrolling in cover view.
All this takes a while (actually ~1 min for about 20 covers) but I wrote the script to create covers only for newly added folders.
In the meanwhile, here are screenshots: