Refactor device status handling and update UI components

- Update device status handling from 'status' to 'isOnline' for consistency
- Remove unused imports and redundant code related to light switches
- Refactor UI components to use 'isOnline' instead of 'status' for device status

lib/features/shared_widgets/custom_switch.dart

@@ -19,7 +19,7 @@ class CustomSwitch extends StatelessWidget {
       builder: (context, state) {
         bool? status;
         if (device != null) {
-          status = device!.status;
+          status = device!.isOnline;
         } else if (category != null) {
           status = category!.devicesStatus;
         }