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/devices/model/function_model.dart

@@ -1,21 +1,10 @@
-//{
-//         "code": "switch_1",
-//         "desc": "switch 1",
-//         "name": "switch 1",
-//         "type": "Boolean",
-//         "values": "{}"
-//       }
 class FunctionModel {
   String? code;
-  String? desc;
-  String? name;
   String? type;
   String? values;
 
   FunctionModel({
     required this.code,
-    required this.desc,
-    required this.name,
     required this.type,
     required this.values,
   });
@@ -23,8 +12,6 @@ class FunctionModel {
   factory FunctionModel.fromJson(Map<String, dynamic> json) {
     return FunctionModel(
       code: json['code'],
-      desc: json['desc'],
-      name: json['name'],
       type: json['type'],
       values: json['values'],
     );
@@ -33,8 +20,6 @@ class FunctionModel {
   Map<String, dynamic> toJson() {
     return {
       'code': code,
-      'desc': desc,
-      'name': name,
       'type': type,
       'values': values,
     };