refactor(legacy-account): move change_password local error to provider (no setState)

modules/legacy/modules/account/lib/src/features/change_password/presentation/change_password_screen.dart

@@ -1,5 +1,6 @@
 import 'package:account/src/features/change_password/domain/password_validator.dart';
 import 'package:account/src/features/change_password/presentation/providers/change_password_controller.dart';
+import 'package:account/src/features/change_password/presentation/providers/change_password_local_error_provider.dart';
 import 'package:account/src/features/change_password/presentation/providers/change_password_visibility_provider.dart';
 import 'package:design_system/design_system.dart';
 import 'package:flutter/material.dart';
@@ -24,7 +25,6 @@ class ChangePasswordScreen extends ConsumerStatefulWidget {
 class _ChangePasswordScreenState extends ConsumerState<ChangePasswordScreen> {
   late final TextEditingController _newPasswordController;
   late final TextEditingController _repeatPasswordController;
-  String? _localError;
 
   @override
   void initState() {
@@ -45,11 +45,8 @@ class _ChangePasswordScreenState extends ConsumerState<ChangePasswordScreen> {
       password: _newPasswordController.text,
       repeat: _repeatPasswordController.text,
     );
-    if (error != null) {
-      setState(() => _localError = error);
-      return;
-    }
-    setState(() => _localError = null);
+    ref.read(changePasswordLocalErrorProvider.notifier).set(error);
+    if (error != null) return;
     ref
         .read(changePasswordControllerProvider.notifier)
         .submit(password: _newPasswordController.text.trim());
@@ -71,6 +68,7 @@ class _ChangePasswordScreenState extends ConsumerState<ChangePasswordScreen> {
     final isLoading = ref.watch(
       changePasswordControllerProvider.select((s) => s.isLoading),
     );
+    final localError = ref.watch(changePasswordLocalErrorProvider);
 
     return LegacyPageLayout(
       title: context.translate(I18n.changePassword),
@@ -91,11 +89,11 @@ class _ChangePasswordScreenState extends ConsumerState<ChangePasswordScreen> {
                 newController: _newPasswordController,
                 repeatController: _repeatPasswordController,
               ),
-              if (_localError != null)
+              if (localError != null)
                 Padding(
                   padding: const EdgeInsets.only(top: 8),
                   child: Text(
-                    context.translate(_localError!),
+                    context.translate(localError),
                     textAlign: TextAlign.center,
                     style: TextStyle(
                       color: Theme.of(context).colorScheme.error,

modules/legacy/modules/account/lib/src/features/change_password/presentation/providers/change_password_local_error_provider.dart

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

modules/legacy/modules/account/lib/src/features/change_password/presentation/providers/change_password_local_error_provider.g.dart

@@ -0,0 +1,64 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'change_password_local_error_provider.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint, type=warning
+
+@ProviderFor(ChangePasswordLocalError)
+const changePasswordLocalErrorProvider = ChangePasswordLocalErrorProvider._();
+
+final class ChangePasswordLocalErrorProvider
+    extends $NotifierProvider<ChangePasswordLocalError, String?> {
+  const ChangePasswordLocalErrorProvider._()
+    : super(
+        from: null,
+        argument: null,
+        retry: null,
+        name: r'changePasswordLocalErrorProvider',
+        isAutoDispose: true,
+        dependencies: null,
+        $allTransitiveDependencies: null,
+      );
+
+  @override
+  String debugGetCreateSourceHash() => _$changePasswordLocalErrorHash();
+
+  @$internal
+  @override
+  ChangePasswordLocalError create() => ChangePasswordLocalError();
+
+  /// {@macro riverpod.override_with_value}
+  Override overrideWithValue(String? value) {
+    return $ProviderOverride(
+      origin: this,
+      providerOverride: $SyncValueProvider<String?>(value),
+    );
+  }
+}
+
+String _$changePasswordLocalErrorHash() =>
+    r'a8cc23f326988bbdc13b058e055daaa8c684a8c8';
+
+abstract class _$ChangePasswordLocalError 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);
+  }
+}