Feature Request: Add "Previous", "Next", and "Favorite" Options While Viewing Files

Hi, thanks for the great tool!

I'd love to see a few small features when viewing a file:

Previous / Next buttons to navigate files in the same folder.

Favorite button to mark files.

Option to sort/filter by favorites in the file list.

This would make it easier to browse and manage important files.
Hope you consider it!

Thanks!