fix(content): finalize language picker integration

Author: fulleni

lib/content_management/bloc/create_source/create_source_bloc.dart

@@ -2,10 +2,9 @@ import 'package:bloc/bloc.dart';
 import 'package:core/core.dart';
 import 'package:country_picker/country_picker.dart' as picker;
 import 'package:data_repository/data_repository.dart';
-import 'package:language_picker/language_picker.dart' as language_picker;
 import 'package:equatable/equatable.dart';
-import 'package:flutter/foundation.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/shared/shared.dart';
+import 'package:language_picker/languages.dart';
 import 'package:uuid/uuid.dart';
 
 part 'create_source_event.dart';

lib/content_management/bloc/create_source/create_source_event.dart

@@ -48,7 +48,7 @@ final class CreateSourceTypeChanged extends CreateSourceEvent {
 /// Event for when the source's language is changed.
 final class CreateSourceLanguageChanged extends CreateSourceEvent {
   const CreateSourceLanguageChanged(this.language);
-  final language_picker.Language? language;
+  final Language? language;
   @override
   List<Object?> get props => [language];
 }

lib/content_management/bloc/create_source/create_source_state.dart

@@ -39,7 +39,7 @@ final class CreateSourceState extends Equatable {
   final String description;
   final String url;
   final SourceType? sourceType;
-  final language_picker.Language? language;
+  final Language? language;
   final Country? headquarters;
   final ContentStatus contentStatus;
   final HttpException? exception;
@@ -60,7 +60,7 @@ final class CreateSourceState extends Equatable {
     String? description,
     String? url,
     ValueGetter<SourceType?>? sourceType,
-    ValueGetter<language_picker.Language?>? language,
+    ValueGetter<Language?>? language,
     ValueGetter<Country?>? headquarters,
     ContentStatus? contentStatus,
     HttpException? exception,

lib/content_management/bloc/edit_source/edit_source_bloc.dart

@@ -2,11 +2,11 @@ import 'package:bloc/bloc.dart';
 import 'package:core/core.dart';
 import 'package:country_picker/country_picker.dart' as picker;
 import 'package:data_repository/data_repository.dart';
-import 'package:language_picker/language_picker.dart' as language_picker;
 import 'package:equatable/equatable.dart';
 import 'package:flutter/foundation.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/shared/shared.dart';
+import 'package:language_picker/languages.dart';
 
 part 'edit_source_event.dart';
 part 'edit_source_state.dart';

lib/content_management/bloc/edit_source/edit_source_event.dart

@@ -56,7 +56,7 @@ final class EditSourceTypeChanged extends EditSourceEvent {
 /// Event triggered when the source language input changes.
 final class EditSourceLanguageChanged extends EditSourceEvent {
   const EditSourceLanguageChanged(this.language);
-  final language_picker.Language? language;
+  final Language? language;
 
   @override
   List<Object?> get props => [language];

lib/content_management/bloc/edit_source/edit_source_state.dart

@@ -1,6 +1,5 @@
 part of 'edit_source_bloc.dart';
 
-import 'package:language_picker/language_picker.dart' as language_picker;
 /// Represents the status of the edit source operation.
 enum EditSourceStatus {
   /// Initial state, before any data is loaded.
@@ -41,7 +40,7 @@ final class EditSourceState extends Equatable {
   final String description;
   final String url;
   final SourceType? sourceType;
-  final language_picker.Language? language;
+  final Language? language;
   final Country? headquarters;
   final ContentStatus contentStatus;
   final HttpException? exception;
@@ -63,7 +62,7 @@ final class EditSourceState extends Equatable {
     String? description,
     String? url,
     ValueGetter<SourceType?>? sourceType,
-    ValueGetter<language_picker.Language?>? language,
+    ValueGetter<Language?>? language,
     ValueGetter<Country?>? headquarters,
     ContentStatus? contentStatus,
     HttpException? exception,

lib/content_management/view/create_source_page.dart

@@ -160,15 +160,13 @@ class _CreateSourceViewState extends State<_CreateSourceView> {
                           .add(CreateSourceUrlChanged(value)),
                     ),
                     const SizedBox(height: AppSpacing.lg),
-                    TextFormField(
+                    LanguagePickerFormField(
+                      labelText: l10n.language,
                       initialValue: state.language,
-                      decoration: InputDecoration(
-                        labelText: l10n.language,
-                        border: const OutlineInputBorder(),
-                      ),
-                      onChanged: (value) => context
-                          .read<CreateSourceBloc>()
-                          .add(CreateSourceLanguageChanged(value)),
+                      onChanged: (language) =>
+                          context.read<CreateSourceBloc>().add(
+                                CreateSourceLanguageChanged(language),
+                              ),
                     ),
                     const SizedBox(height: AppSpacing.lg),
                     DropdownButtonFormField<SourceType?>(