Is there a way to browse your media (local, LMS, Spotify) from a lovelace media player? te default one, or mini one? Also the spotify lovelace card only supports playlists and not browse full Spotify catalogue.
Were you able to get this to work? Following…
Sorry I am late to the party on this, but if you are still interested in a Mini Media Player Browse Media button for Spotify content read on …
I use Mini Media Player for my SpotifyPlus integration. Check out the UI Dashboards wiki page for an example of how to add a browse media button to the Mini Media Player, what it looks like, requirements, etc. Note the browser_mod 2 requirement.
You should be able to tweak that for the standard Spotify integration, or feel free to upgrade to my SpotifyPlus integration - it does everything the standard Spotify integration does and much more.
Hope it helps!