Cache book covers on the mobile app

[PulsarFTW]

It would be great if cover images could be cached inside the app to increase speed and responsiveness.

Although this likely low priority.

[PulsarFTW]

Sample of perceived slow response:

https://github.com/advplyr/audiobookshelf-app/assets/115924048/a3cc1878-2bad-4c0b-80d7-9242fd35b4a2

[gh0sti]

It would be nice if it could do this.

[KaiStarkk]

Good idea. As an extension to this, I wonder if it would be possible for clients to cache their own version of the library and metadata entirely, only communicating with the server to check for changes and actually stream / download tracks.