fix: align player cascade type to IStreamingPlayerService so consumers stop receiving null

DeepDrftPublic.Client/Pages/Home.razor

@@ -226,5 +226,5 @@
 </section>
 
 @code {
-    [CascadingParameter] public IPlayerService? Player { get; set; }
+    [CascadingParameter] public IStreamingPlayerService? Player { get; set; }
 }

DeepDrftPublic.Client/Pages/TracksView.razor.cs

@@ -9,7 +9,7 @@ namespace DeepDrftPublic.Client.Pages;
 public partial class TracksView : ComponentBase
 {
     [Inject] public required TracksViewModel ViewModel { get; set; }
-    [CascadingParameter] public required IPlayerService PlayerService { get; set; }
+    [CascadingParameter] public required IStreamingPlayerService PlayerService { get; set; }
     
     private TrackDto? _selectedTrack = null;
     private int _clickCount = 0;