Introduced ProjectCubit to handle project-related state.

lib/pages/auth/model/project_model.dart

@@ -0,0 +1,27 @@
+class Project {
+  final String uuid;
+  final String name;
+  final String description;
+
+  const Project({
+    required this.uuid,
+    required this.name,
+    required this.description,
+  });
+
+  factory Project.fromJson(Map<String, dynamic> json) {
+    return Project(
+      uuid: json['uuid'] as String,
+      name: json['name'] as String,
+      description: json['description'] as String,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'uuid': uuid,
+      'name': name,
+      'description': description,
+    };
+  }
+}

lib/pages/common/bloc/project_cubit.dart

@@ -0,0 +1,19 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
+class ProjectCubit extends Cubit<String?> {
+  final FlutterSecureStorage storage;
+  static const String projectKey = "selected_project_uuid";
+
+  ProjectCubit(this.storage) : super(null);
+
+  Future<void> setProjectUUID(String newUUID) async {
+    await storage.write(key: projectKey, value: newUUID);
+    emit(newUUID);
+  }
+
+  Future<void> clearProjectUUID() async {
+    await storage.delete(key: projectKey);
+    emit(null);
+  }
+}