fix music navs

app.py

@@ -158,7 +158,9 @@ def manifest():
 @handle_errors
 def api_state():
     data = controller.state()
-    _mark_spotify_accounts(data["rooms"])
+    # Demo rooms are not on anyone's real Spotify, so they bring their own account.
+    if not data.get("demo"):
+        _mark_spotify_accounts(data["rooms"])
     return jsonify(data)