add adaptive_scaffold

mobile-v2/lib/presentation/modules/login/models/login_page.model.dart

@@ -0,0 +1,46 @@
+import 'package:flutter/material.dart';
+
+@immutable
+class LoginPageState {
+  final bool isServerValidated;
+  final bool isValidationInProgress;
+
+  const LoginPageState({
+    required this.isServerValidated,
+    required this.isValidationInProgress,
+  });
+
+  factory LoginPageState.reset() {
+    return const LoginPageState(
+      isServerValidated: false,
+      isValidationInProgress: false,
+    );
+  }
+
+  LoginPageState copyWith({
+    bool? isServerValidated,
+    bool? isValidationInProgress,
+  }) {
+    return LoginPageState(
+      isServerValidated: isServerValidated ?? this.isServerValidated,
+      isValidationInProgress:
+          isValidationInProgress ?? this.isValidationInProgress,
+    );
+  }
+
+  @override
+  String toString() =>
+      'LoginPageState(isServerValidated: $isServerValidated, isValidationInProgress: $isValidationInProgress)';
+
+  @override
+  bool operator ==(covariant LoginPageState other) {
+    if (identical(this, other)) return true;
+
+    return other.isServerValidated == isServerValidated &&
+        other.isValidationInProgress == isValidationInProgress;
+  }
+
+  @override
+  int get hashCode =>
+      isServerValidated.hashCode ^ isValidationInProgress.hashCode;
+}