Fixes for Settings Page

frontend/pweb/lib/providers/password_form.dart

@@ -0,0 +1,76 @@
+import 'package:flutter/material.dart';
+
+import 'package:pshared/provider/account.dart';
+
+import 'package:pweb/models/edit_state.dart';
+
+
+class PasswordFormProvider extends ChangeNotifier {
+  final formKey = GlobalKey<FormState>();
+  final oldPasswordController = TextEditingController();
+  final newPasswordController = TextEditingController();
+  final confirmPasswordController = TextEditingController();
+
+  EditState _state = EditState.view;
+  String _errorText = '';
+  bool _disposed = false;
+
+  bool get isExpanded => _state != EditState.view;
+  bool get isSaving => _state == EditState.saving;
+  String get errorText => _errorText;
+  EditState get state => _state;
+
+  void toggleExpanded() {
+    if (_state == EditState.saving) return;
+    _setState(_state == EditState.view ? EditState.edit : EditState.view);
+    _setError('');
+  }
+
+  Future<void> submit({
+    required AccountProvider accountProvider,
+    required String errorText,
+  }) async {
+    final currentForm = formKey.currentState;
+    if (currentForm == null || !currentForm.validate()) return;
+
+    _setState(EditState.saving);
+    _setError('');
+
+    try {
+      await accountProvider.changePassword(
+        oldPasswordController.text,
+        newPasswordController.text,
+      );
+
+      oldPasswordController.clear();
+      newPasswordController.clear();
+      confirmPasswordController.clear();
+    } catch (e) {
+      _setError(errorText);
+      rethrow;
+    } finally {
+      _setState(EditState.edit);
+    }
+  }
+
+  void _setState(EditState value) {
+    if (_state == value || _disposed) return;
+    _state = value;
+    notifyListeners();
+  }
+
+  void _setError(String value) {
+    if (_disposed) return;
+    _errorText = value;
+    notifyListeners();
+  }
+
+  @override
+  void dispose() {
+    _disposed = true;
+    oldPasswordController.dispose();
+    newPasswordController.dispose();
+    confirmPasswordController.dispose();
+    super.dispose();
+  }
+}