streaming edits

lib/state/providers.dart

@@ -549,9 +549,15 @@ final playbackProvider =
     if (local != null) return Uri.file(local);
     final client = ref.read(subsonicClientProvider);
     if (client == null) return null;
+    final rate = ref.read(settingsProvider).streamMaxBitRate;
+    // When transcoding, ask the server to advertise a Content-Length so the
+    // native player can derive a duration and hold position (otherwise the
+    // playhead freezes at 0:00 and the track restarts). Harmless to omit for
+    // original streams, which already carry a real length.
     return client.streamUri(
       s.id,
-      maxBitRate: ref.read(settingsProvider).streamMaxBitRate,
+      maxBitRate: rate,
+      estimateContentLength: rate > 0,
     );
   }