feat(local_ads_management): add extension for converting LocalAd to AdType

- Add LocalAdToAdType extension to convert LocalAd's adType string to AdType enum
- Import AppLocalizations for localization support

Author: fulleni

lib/local_ads_management/view/local_ads_management_page.dart

@@ -4,6 +4,7 @@ import 'package:data_table_2/data_table_2.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_news_app_web_dashboard_full_source_code/l10n/app_localizations.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/l10n/l10n.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/local_ads_management/bloc/local_ads_management_bloc.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/router/routes.dart';

lib/shared/extensions/local_ad_to_ad_type.dart

@@ -0,0 +1,24 @@
+import 'package:core/core.dart';
+
+/// Defines extension methods for [LocalAd] to convert its `adType` string
+/// to the corresponding [AdType] enum.
+extension LocalAdToAdType on LocalAd {
+  /// Converts the `adType` string of this [LocalAd] instance to an [AdType] enum.
+  ///
+  /// Throws a [StateError] if the `adType` string does not correspond to a
+  /// valid [AdType] enum value.
+  AdType toAdType() {
+    switch (adType) {
+      case 'native':
+        return AdType.native;
+      case 'banner':
+        return AdType.banner;
+      case 'interstitial':
+        return AdType.interstitial;
+      case 'video':
+        return AdType.video;
+      default:
+        throw StateError('Unknown adType: $adType');
+    }
+  }
+}

lib/shared/extensions/string_truncate.dart

@@ -1,8 +1,23 @@
-extension StringTruncate on String {
+/// Extension on [String] to provide truncation and capitalization utilities.
+extension StringX on String {
+  /// Truncates the string to a specified [maxLength].
+  ///
+  /// If the string's length exceeds [maxLength], it is truncated and
+  /// '...' is appended.
   String truncate(int maxLength) {
     if (length <= maxLength) {
       return this;
     }
     return '${substring(0, maxLength)}...';
   }
+
+  /// Capitalizes the first letter of the string.
+  ///
+  /// Returns the original string if it is empty.
+  String capitalize() {
+    if (isEmpty) {
+      return this;
+    }
+    return '${this[0].toUpperCase()}${substring(1)}';
+  }
 }