.epub object creation support and reading inside capacities

Right now Capacities has object creation for PDFs.

With the PDF object support I can open a PDF inside Capacities (without downloading it on my computer or phone), which is great and I use a lot for all my documents and books.

However I'd like to be able to do the same for an .epub

I think it would benefit Capacities back-end, as on average a 300 page book in PDF is 3-10 MB in size (assuming its text heavy and no pictures), meanwhile an .epub file of the same book is 1-3 MB in size.

This would help Capacities lower its data usage on servers and speed up the time it takes to open/load the reading window when I click on a PDF in my workspace.

Maybe have somekind of Calibre pluging for Capacities, albeit I namely am using the mobile app now (so I don't know how that would work on the mobile app).

For the mobile app, it could be best to have an internal cache for PDFs and Files (i.e. videos, audio, etc.) objects previously uploaded. That way I there isn't a lag on opening up said file/object and going through it. It's akin to working offline.