feat(content_management): Add EditCategoryState

- Defines EditCategoryStatus enum
- Implements EditCategoryState class
- Includes form validation logic

Author: fulleni

lib/content_management/bloc/edit_category/edit_category_state.dart

@@ -0,0 +1,64 @@
+part of 'edit_category_bloc.dart';
+
+/// Represents the status of the edit category operation.
+enum EditCategoryStatus {
+  /// Initial state, before any data is loaded.
+  initial,
+
+  /// Data is being loaded.
+  loading,
+
+  /// Data has been successfully loaded or an operation completed.
+  success,
+
+  /// An error occurred.
+  failure,
+
+  /// The form is being submitted.
+  submitting,
+}
+
+/// The state for the [EditCategoryBloc].
+final class EditCategoryState extends Equatable {
+  const EditCategoryState({
+    this.status = EditCategoryStatus.initial,
+    this.initialCategory,
+    this.name = '',
+    this.description = '',
+    this.iconUrl = '',
+    this.errorMessage,
+  });
+
+  final EditCategoryStatus status;
+  final Category? initialCategory;
+  final String name;
+  final String description;
+  final String iconUrl;
+  final String? errorMessage;
+
+  /// Returns true if the form is valid and can be submitted.
+  bool get isFormValid => name.isNotEmpty;
+
+  EditCategoryState copyWith({
+    EditCategoryStatus? status,
+    Category? initialCategory,
+    String? name,
+    String? description,
+    String? iconUrl,
+    String? errorMessage,
+  }) {
+    return EditCategoryState(
+      status: status ?? this.status,
+      initialCategory: initialCategory ?? this.initialCategory,
+      name: name ?? this.name,
+      description: description ?? this.description,
+      iconUrl: iconUrl ?? this.iconUrl,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props =>
+      [status, initialCategory, name, description, iconUrl, errorMessage];
+}
+