feat(ui): prompt before closing window if music is playing (#4899)

* feat(ui): prompt before closing window if music is playing - #4898

* simplify logic

ui/src/audioplayer/Player.jsx

@@ -95,6 +95,19 @@ const Player = () => {
     }
   }, [audioInstance, context, gainNode, playerState, gainInfo])
 
+  useEffect(() => {
+    const handleBeforeUnload = (e) => {
+      // Check there's a current track and is actually playing/not paused
+      if (playerState.current?.uuid && audioInstance && !audioInstance.paused) {
+        e.preventDefault()
+        e.returnValue = '' // Chrome requires returnValue to be set
+      }
+    }
+
+    window.addEventListener('beforeunload', handleBeforeUnload)
+    return () => window.removeEventListener('beforeunload', handleBeforeUnload)
+  }, [playerState, audioInstance])
+
   const defaultOptions = useMemo(
     () => ({
       theme: playerTheme,