refactor(modules): improve exception handling and simplify service usage

Enhancements
- Replace bare `except:` with `except Exception:` in multiple modules- Cast step calculation to `int` for consistent type
- Simplify `get_battery_icon_file` to return a string directly
- Use `get_todo_service()` instead of module-level `todo_service` throughout todo widget
- Remove unused `"zen": "zen-browser"` mapping entry

Bug Fixes
- Prevent bare exception swallowing by catching `Exception` explicitly
- Ensure proper cleanup of timer IDs and other resources
- Delete unused modules/osdd components

New Features
- None

modules/controlcenter/player.py

@@ -556,7 +556,6 @@ class PlayerBoxStack(Box):
             self._update_all_player_buttons()
 
     def on_new_player(self, mpris_manager, player):
-        player_name = player.props.player_name
 
         # if player_name in self.config.get("ignore", []):
         #     return