Put model in its own file

lib/models/alarm_state.dart

@@ -38,22 +38,3 @@ final class AlarmState extends Equatable {
         hasSirenActive,
       ];
 }
-
-final class AreaState extends Equatable {
-  const AreaState({
-    required this.areaNumber,
-    required this.isOpen,
-    required this.isDisabled,
-  });
-
-  final int areaNumber;
-  final bool isOpen;
-  final bool isDisabled;
-
-  @override
-  List<Object> get props => [
-        areaNumber,
-        isOpen,
-        isDisabled,
-      ];
-}

lib/models/area_state.dart

@@ -0,0 +1,20 @@
+import 'package:equatable/equatable.dart';
+
+final class AreaState extends Equatable {
+  const AreaState({
+    required this.areaNumber,
+    required this.isOpen,
+    required this.isDisabled,
+  });
+
+  final int areaNumber;
+  final bool isOpen;
+  final bool isDisabled;
+
+  @override
+  List<Object> get props => [
+        areaNumber,
+        isOpen,
+        isDisabled,
+      ];
+}

lib/repositories/alarm_system_repository.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'dart:html';
 
 import 'package:alarmapp_pwa/models/alarm_state.dart';
+import 'package:alarmapp_pwa/models/area_state.dart';
 import 'package:http/http.dart' as http;
 
 const String _baseUrl = 'api.particle.io';