[ailurux]

But even within one of these database indexes, if I select a single track then I cannot go to the next one.

That's expected behaviour. Selecting an individual track just adds that track and that track only to the queue. To add an album or database index (ie, all tracks, tracks with a particular genre) to the queue you'd use the "play/shuffle" all buttons, or the "enqueue" button to add tracks to the existing queue.

It sounds like a "play from here" feature is maybe what you're after? I've created an issue on our repo (https://codeberg.org/cool-tech-zone/tang...issues/205) for adding this feature as well as adding a way to enqueue individual tracks.