more refactoring - compiles now but not extensively tested

backend/app.go

@@ -25,7 +25,6 @@ type App struct {
 	Config          *Config
 	ServerManager   *ServerManager
 	ImageManager    *ImageManager
-	LibraryManager  *LibraryManager
 	PlaybackManager *PlaybackManager
 	Player          *player.Player
 	UpdateChecker   UpdateChecker
@@ -63,11 +62,10 @@ func StartupApp(appName, appVersionTag, configFile, latestReleaseURL string) (*A
 
 	a.ServerManager = NewServerManager(appName)
 	a.PlaybackManager = NewPlaybackManager(a.bgrndCtx, a.ServerManager, a.Player, &a.Config.Scrobbling)
-	a.LibraryManager = NewLibraryManager(a.ServerManager)
 	a.ImageManager = NewImageManager(a.bgrndCtx, a.ServerManager, configdir.LocalCache(a.appName))
-	a.LibraryManager.PreCacheCoverFn = func(coverID string) {
-		_, _ = a.ImageManager.GetCoverThumbnail(coverID)
-	}
+	//a.LibraryManager.PreCacheCoverFn = func(coverID string) {
+	//_, _ = a.ImageManager.GetCoverThumbnail(coverID)
+	//}
 
 	return a, nil
 }