add dropdown

lib/features/users/data/datasources/users_local_datasource.dart

@@ -0,0 +1,62 @@
+import 'package:hive_ce/hive.dart';
+
+import '../models/user_model.dart';
+
+/// Abstract interface for users local data source
+abstract class UsersLocalDataSource {
+  /// Get all users from local storage
+  Future<List<UserModel>> getUsers();
+
+  /// Save users to local storage
+  Future<void> saveUsers(List<UserModel> users);
+
+  /// Clear all users from local storage
+  Future<void> clearUsers();
+}
+
+/// Implementation of UsersLocalDataSource using Hive
+class UsersLocalDataSourceImpl implements UsersLocalDataSource {
+  static const String _boxName = 'users';
+
+  Future<Box<UserModel>> get _box async {
+    if (!Hive.isBoxOpen(_boxName)) {
+      return await Hive.openBox<UserModel>(_boxName);
+    }
+    return Hive.box<UserModel>(_boxName);
+  }
+
+  @override
+  Future<List<UserModel>> getUsers() async {
+    try {
+      final box = await _box;
+      return box.values.toList();
+    } catch (e) {
+      throw Exception('Failed to get users from local storage: $e');
+    }
+  }
+
+  @override
+  Future<void> saveUsers(List<UserModel> users) async {
+    try {
+      final box = await _box;
+      await box.clear();
+
+      // Save users with their ID as key
+      for (final user in users) {
+        await box.put(user.id, user);
+      }
+    } catch (e) {
+      throw Exception('Failed to save users to local storage: $e');
+    }
+  }
+
+  @override
+  Future<void> clearUsers() async {
+    try {
+      final box = await _box;
+      await box.clear();
+    } catch (e) {
+      throw Exception('Failed to clear users from local storage: $e');
+    }
+  }
+}