Fix AVR playing state

static/app.js

@@ -263,11 +263,11 @@ function paintGrouping() {
   ui.joined.hidden = inside.length === 0;
   // Grouped rooms share the host's transport, so one of them playing means
   // the whole group is -- and the tint goes on the group's card.
-  const groupPlaying = inside.some((node) => node.classList.contains('playing'));
-  ui.source.classList.toggle('playing', groupPlaying);
-  // A film on the Zidoo also moves the AVR up. The Zidoo does not say whether
-  // it is paused, so a loaded film counts, and it gets no tint.
-  ui.source.classList.toggle('on-top', groupPlaying || Boolean(avrNowPlaying));
+  // A film running on the Zidoo counts as the AVR playing too, grouped rooms or not.
+  const playing = inside.some((node) => node.classList.contains('playing'))
+    || avrNowPlaying?.play_state === 'play';
+  ui.source.classList.toggle('playing', playing);
+  ui.source.classList.toggle('on-top', playing);
 }
 
 /* Press and hold to keep moving, accelerating as you hold. */