refactor: remove unused signal parameters from event handlers

src/window/controlcenter/expanded_player.py

@@ -734,7 +734,7 @@ class PlayerBox(Box):
         self._seek_timeout = GLib.timeout_add(1000, self._clear_seeking)
         return False
 
-    def _on_change_value(self, scale, scroll, value):
+    def _on_change_value(self, scale, _scroll, value):
         if not self.player or self.exit:
             return False
         self._user_seeking = True

src/window/controlcenter/main.py

@@ -511,7 +511,7 @@ class ModusControlCenter(AppletWindow):
         # Connect to visibility changes for cleanup
         self.connect("notify::visible", self._on_visibility_changed)
 
-    def _on_visibility_changed(self, widget, param):
+    def _on_visibility_changed(self, widget, _param):
         """Handle visibility changes for resource management"""
         if not self.get_visible():
             # Suspend player updates