option to disable autosuggest

app/lib/features/search/domain/autosuggest/duckduckgo.g.dart

@@ -7,7 +7,7 @@ part of 'duckduckgo.dart';
 // **************************************************************************
 
 String _$duckDuckGoAutosuggestServiceHash() =>
-    r'1679e6d9bce7cb380b1ee60c768abe2fddb79478';
+    r'd9f30a577b276049b252be890bc73eb18aa118f2';
 
 /// See also [DuckDuckGoAutosuggestService].
 @ProviderFor(DuckDuckGoAutosuggestService)

app/lib/features/search/domain/autosuggest/empty.dart

@@ -0,0 +1,17 @@
+import 'package:exceptions/exceptions.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:weblibre/features/search/domain/entities/abstract/i_search_suggestion_provider.dart';
+
+part 'empty.g.dart';
+
+@Riverpod(keepAlive: true)
+class EmptyAutosuggestService extends _$EmptyAutosuggestService
+    implements ISearchSuggestionProvider {
+  @override
+  void build() {}
+
+  @override
+  Future<Result<List<String>>> getSuggestions(String query) {
+    return Future.value(Result.success([]));
+  }
+}

app/lib/features/search/domain/autosuggest/empty.g.dart

@@ -0,0 +1,27 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'empty.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+String _$emptyAutosuggestServiceHash() =>
+    r'7fbe81807baf379cf621ef46fba00e46778978f8';
+
+/// See also [EmptyAutosuggestService].
+@ProviderFor(EmptyAutosuggestService)
+final emptyAutosuggestServiceProvider =
+    NotifierProvider<EmptyAutosuggestService, void>.internal(
+      EmptyAutosuggestService.new,
+      name: r'emptyAutosuggestServiceProvider',
+      debugGetCreateSourceHash: const bool.fromEnvironment('dart.vm.product')
+          ? null
+          : _$emptyAutosuggestServiceHash,
+      dependencies: null,
+      allTransitiveDependencies: null,
+    );
+
+typedef _$EmptyAutosuggestService = Notifier<void>;
+// ignore_for_file: type=lint
+// ignore_for_file: subtype_of_sealed_class, invalid_use_of_internal_member, invalid_use_of_visible_for_testing_member, deprecated_member_use_from_same_package

app/lib/features/search/domain/entities/abstract/i_search_suggestion_provider.dart

@@ -1,13 +1,14 @@
 import 'package:exceptions/exceptions.dart';
 
 enum SearchSuggestionProviders {
+  none('Disabled', null),
   brave('Brave', 'brave'),
   ddg('DuckDuckGo', 'ddg'),
   kagi('Kagi', 'kagi'),
   qwant('Qwant', 'qwant');
 
   final String label;
-  final String relatedBang;
+  final String? relatedBang;
 
   const SearchSuggestionProviders(this.label, this.relatedBang);
 }