Fix account swaping

demo.py

@@ -42,6 +42,11 @@ class _FakeAvr:
 
 
 class DemoController:
+    # app.py checks this before anything that would touch real hardware
+    # over the network -- the speakers this stands in for may be switched
+    # on in the next room.
+    demo = True
+
     def __init__(self, cfg):
         self.cfg = cfg
         self.avr = _FakeAvr()
@@ -150,8 +155,15 @@ class DemoController:
         return [{"name": s["name"], "input_id": s["code"]} for s in self.avr.inputs()]
 
     def play_heos_input(self, key, input_id, source_key=None):
+        # A room put on one of its own inputs is off Spotify, which is how
+        # the panel lets go of a room -- see app.py's _spotify_release.
+        if key in self._spotify:
+            self._spotify[key] = False
         return None
 
+    def on_spotify(self, key):
+        return self._spotify.get(key, False)
+
     # -- the AVR: app.py calls these directly, same as the real Controller
     def avr_inputs(self):
         return self.avr.inputs()