fix(src/window/controlcenter): add guard for destroyed state and adjust return value

src/window/controlcenter/per_app_volume.py

@@ -193,6 +193,9 @@ class PerAppVolumeControl(Box):
 
     def _populate_apps(self):
         """Populate the widget with current audio applications"""
+        if self._destroyed:
+            return False
+
         from utils.functions import clear_children
 
         clear_children(self.apps_container)
@@ -202,7 +205,7 @@ class PerAppVolumeControl(Box):
         # Use fabric audio service for applications
         if not audio_service:
             self._show_no_apps_message()
-            return
+            return None
 
         applications = getattr(audio_service, "applications", [])
 
@@ -230,6 +233,8 @@ class PerAppVolumeControl(Box):
         else:
             self._show_no_apps_message()
 
+        return False
+
     def _show_no_apps_message(self):
         """Show message when no apps are playing audio"""
         message = Label(