add Play random button to album page

backend/playbackmanager.go

@@ -295,13 +295,13 @@ func (p *PlaybackManager) PlayRandomAlbums(genreName string) error {
 	}
 
 	mp := p.engine.sm.Server
-	var filter mediaprovider.AlbumFilter
+	var options mediaprovider.AlbumFilterOptions
 	if genreName != "" {
-		filter = mediaprovider.NewAlbumFilter(mediaprovider.AlbumFilterOptions{
+		options = mediaprovider.AlbumFilterOptions{
 			Genres: []string{genreName},
-		})
+		}
 	}
-	iter := mp.IterateAlbums(mediaprovider.AlbumSortRandom, filter)
+	iter := mp.IterateAlbums(mediaprovider.AlbumSortRandom, mediaprovider.NewAlbumFilter(options))
 	insertMode := Replace
 	for i := 0; i < 20; i++ {
 		al := iter.Next()

ui/browsing/albumspage.go

@@ -1,10 +1,12 @@
 package browsing
 
 import (
+	"log"
 	"slices"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/lang"
+	"fyne.io/fyne/v2/widget"
 	"github.com/dweymouth/supersonic/backend"
 	"github.com/dweymouth/supersonic/backend/mediaprovider"
 	"github.com/dweymouth/supersonic/ui/controller"
@@ -63,7 +65,20 @@ func (a *albumsPageAdapter) SaveSortOrder(orderIdx int) {
 	a.cfg.SortOrder = a.mp.AlbumSortOrders()[orderIdx]
 }
 
-func (a *albumsPageAdapter) ActionButton() fyne.CanvasObject { return nil }
+func (a *albumsPageAdapter) ActionButton() fyne.CanvasObject {
+	fn := func() {
+		go func() {
+			if err := a.pm.PlayRandomAlbums(""); err != nil {
+				log.Printf("error playing random albums: %v", err)
+				fyne.Do(func() {
+					a.contr.ToastProvider.ShowErrorToast(lang.L("Unable to play random albums"))
+				})
+			}
+		}()
+	}
+
+	return widget.NewButtonWithIcon(lang.L("Play random"), myTheme.ShuffleIcon, fn)
+}
 
 func (a *albumsPageAdapter) Iter(sortOrderIdx int, filter mediaprovider.AlbumFilter) widgets.GridViewIterator {
 	sortOrder := a.mp.AlbumSortOrders()[sortOrderIdx]