feature: Embed Frame Player

DeepDrftPublic.Client/Services/StreamingAudioPlayerService.cs

@@ -59,6 +59,17 @@ public class StreamingAudioPlayerService : AudioPlayerService, IStreamingPlayerS
         await NotifyStateChanged();
     }
 
+    /// <inheritdoc />
+    public async Task StageTrack(TrackDto track)
+    {
+        // Pure state: expose the track as current so the bar shows it ready, but do NOT
+        // initialize the player, resume the AudioContext, or start streaming. Those steps
+        // require a user gesture and run on the first play click via SelectTrackStreaming.
+        CurrentTrack = track;
+        ErrorMessage = null;
+        await NotifyStateChanged();
+    }
+
     private async Task LoadTrackStreaming(TrackDto track)
     {
         // Always reset to clean state before loading new track. ResetToIdle