refactor(legacy-settings): move language selection state to provider (no setState)

modules/legacy/modules/settings/lib/src/features/language/presentation/language_screen.dart

@@ -6,6 +6,7 @@ import 'package:legacy_theme/legacy_theme.dart';
 import 'package:legacy_ui/legacy_ui.dart';
 import 'package:navigation/navigation.dart';
 import 'package:settings/src/features/language/presentation/providers/language_controller.dart';
+import 'package:settings/src/features/language/presentation/providers/language_selection_provider.dart';
 import 'package:sf_localizations/sf_localizations.dart';
 import 'package:sf_shared/sf_shared.dart';
 
@@ -18,20 +19,13 @@ const _languageOptions = <String, String>{
   'de': 'Deutsch',
 };
 
-class LanguageScreen extends ConsumerStatefulWidget {
+class LanguageScreen extends ConsumerWidget {
   final NavigationContract navigationContract;
 
   const LanguageScreen({super.key, required this.navigationContract});
 
   @override
-  ConsumerState<LanguageScreen> createState() => _LanguageScreenState();
-}
-
-class _LanguageScreenState extends ConsumerState<LanguageScreen> {
-  String? _selectedLanguage;
-
-  @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
     ref.listen(languageControllerProvider, (prev, next) async {
       next.showErrorOn(context);
       if (prev != null &&
@@ -39,13 +33,14 @@ class _LanguageScreenState extends ConsumerState<LanguageScreen> {
           !next.isLoading &&
           !next.hasError) {
         await showSuccessDialog(context, I18n.deviceUpdatedSuccess);
-        if (context.mounted) widget.navigationContract.goBack();
+        if (context.mounted) navigationContract.goBack();
       }
     });
 
     final device = ref.watch(selectedDeviceProvider).value;
     final currentLanguage = device?.settings.language ?? 'es';
-    final selectedLanguage = _selectedLanguage ?? currentLanguage;
+    final selectedLanguage =
+        ref.watch(languageSelectionProvider) ?? currentLanguage;
     final isLoading = ref.watch(
       languageControllerProvider.select((s) => s.isLoading),
     );
@@ -56,7 +51,9 @@ class _LanguageScreenState extends ConsumerState<LanguageScreen> {
         child: RadioGroup(
           groupValue: selectedLanguage,
           onChanged: (value) {
-            if (value != null) setState(() => _selectedLanguage = value);
+            if (value != null) {
+              ref.read(languageSelectionProvider.notifier).select(value);
+            }
           },
           child: Column(
             children: _languageOptions.entries

modules/legacy/modules/settings/lib/src/features/language/presentation/providers/language_controller.g.dart

@@ -34,7 +34,7 @@ final class LanguageControllerProvider
 }
 
 String _$languageControllerHash() =>
-    r'54d18f53bea0cdb8f7346cf66d4c1e190cfd7d75';
+    r'b34791c28274cfb33d9f116788574e7e9aeaa818';
 
 abstract class _$LanguageController extends $AsyncNotifier<void> {
   FutureOr<void> build();

modules/legacy/modules/settings/lib/src/features/language/presentation/providers/language_selection_provider.dart

@@ -0,0 +1,11 @@
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'language_selection_provider.g.dart';
+
+@riverpod
+class LanguageSelection extends _$LanguageSelection {
+  @override
+  String? build() => null;
+
+  void select(String value) => state = value;
+}

modules/legacy/modules/settings/lib/src/features/language/presentation/providers/language_selection_provider.g.dart

@@ -0,0 +1,63 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'language_selection_provider.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint, type=warning
+
+@ProviderFor(LanguageSelection)
+const languageSelectionProvider = LanguageSelectionProvider._();
+
+final class LanguageSelectionProvider
+    extends $NotifierProvider<LanguageSelection, String?> {
+  const LanguageSelectionProvider._()
+    : super(
+        from: null,
+        argument: null,
+        retry: null,
+        name: r'languageSelectionProvider',
+        isAutoDispose: true,
+        dependencies: null,
+        $allTransitiveDependencies: null,
+      );
+
+  @override
+  String debugGetCreateSourceHash() => _$languageSelectionHash();
+
+  @$internal
+  @override
+  LanguageSelection create() => LanguageSelection();
+
+  /// {@macro riverpod.override_with_value}
+  Override overrideWithValue(String? value) {
+    return $ProviderOverride(
+      origin: this,
+      providerOverride: $SyncValueProvider<String?>(value),
+    );
+  }
+}
+
+String _$languageSelectionHash() => r'0921d5dd3856c13e55ab5d0836cde0fe9a6494df';
+
+abstract class _$LanguageSelection extends $Notifier<String?> {
+  String? build();
+  @$mustCallSuper
+  @override
+  void runBuild() {
+    final created = build();
+    final ref = this.ref as $Ref<String?, String?>;
+    final element =
+        ref.element
+            as $ClassProviderElement<
+              AnyNotifier<String?, String?>,
+              String?,
+              Object?,
+              Object?
+            >;
+    element.handleValue(ref, created);
+  }
+}