feat(profile): implement user-initiated GDPR-compliant profile deletion

- Add DELETE /users/me endpoint with cascading data removal
- Implement frontend confirmation dialog and deletion flow
- Add audit logging for deletion requests
- Update localization files for new UI strings
- Add scheduled cleanup service for AI traces
- Document GDPR compliance in technical specification

BREAKING CHANGE: Users can now permanently delete their profiles and associated data

flutter/lib/features/profile/data/profile_repository.dart

@@ -42,6 +42,14 @@ class ProfileRepository {
     return UserProfile.fromJson(data);
   }
 
+  Future<void> deleteMe() async {
+    final token = await _ref.read(authStateProvider.future);
+    await guardedApiCall(
+      _ref,
+      () => _apiClient.deleteJson(UserApiPaths.me, token: token),
+    );
+  }
+
   Future<void> refreshCategories() async {
     final token = await _ref.read(authStateProvider.future);
     await guardedApiCall(

flutter/lib/features/profile/presentation/profile_screen.dart

@@ -20,6 +20,7 @@ class _ProfileScreenState extends ConsumerState<ProfileScreen> {
   final _formKey = GlobalKey<FormState>();
   bool _isLoading = true;
   bool _isSaving = false;
+  bool _isDeleting = false;
   String? _error;
   UserProfile? _profile;
 
@@ -96,6 +97,61 @@ class _ProfileScreenState extends ConsumerState<ProfileScreen> {
     context.go('/login');
   }
 
+  Future<void> _showDeleteProfileConfirmation() async {
+    return showDialog<void>(
+      context: context,
+      barrierDismissible: false,
+      builder: (BuildContext context) {
+        return AlertDialog(
+          title: Text(context.l10n.profileDeleteConfirmTitle),
+          content: SingleChildScrollView(
+            child: ListBody(
+              children: <Widget>[
+                Text(context.l10n.profileDeleteConfirmMessage),
+              ],
+            ),
+          ),
+          actions: <Widget>[
+            TextButton(
+              child: Text(context.l10n.noLabel),
+              onPressed: () {
+                Navigator.of(context).pop();
+              },
+            ),
+            TextButton(
+              child: Text(context.l10n.deleteAction),
+              onPressed: () {
+                Navigator.of(context).pop();
+                _deleteProfile();
+              },
+            ),
+          ],
+        );
+      },
+    );
+  }
+
+  Future<void> _deleteProfile() async {
+    setState(() => _isDeleting = true);
+    try {
+      await ref.read(profileRepositoryProvider).deleteMe();
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text(context.l10n.profileDeletedMessage)),
+      );
+      await ref.read(authStateProvider.notifier).logout();
+      if (!mounted) return;
+      context.go('/login');
+    } catch (e) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        buildCopyableErrorSnackBar(context, mapErrorToUserMessage(e, context)),
+      );
+    } finally {
+      if (mounted) setState(() => _isDeleting = false);
+    }
+  }
+
   Widget _buildProfileForm(BuildContext context, ThemeData theme) {
     return Form(
       key: _formKey,
@@ -286,6 +342,24 @@ class _ProfileScreenState extends ConsumerState<ProfileScreen> {
                     label: Text(context.l10n.logoutAction),
                   ),
                 ),
+                const SizedBox(height: 12),
+                SizedBox(
+                  width: double.infinity,
+                  child: FilledButton.icon(
+                    onPressed: _isDeleting ? null : _showDeleteProfileConfirmation,
+                    icon: _isDeleting
+                        ? const SizedBox(
+                            height: 20,
+                            width: 20,
+                            child: CircularProgressIndicator(strokeWidth: 2),
+                          )
+                        : const Icon(Icons.delete_forever_outlined),
+                    label: Text(context.l10n.profileDeleteAction),
+                    style: FilledButton.styleFrom(
+                      backgroundColor: Colors.red,
+                    ),
+                  ),
+                ),
               ],
             ),
           ),

flutter/lib/generated/intl/messages_all.dart

@@ -0,0 +1,68 @@
+// DO NOT EDIT. This is code generated via package:intl/generate_localized.dart
+// This is a library that looks up messages for specific locales by
+// delegating to the appropriate library.
+
+// Ignore issues from commonly used lints in this file.
+// ignore_for_file:implementation_imports, file_names, unnecessary_new
+// ignore_for_file:unnecessary_brace_in_string_interps, directives_ordering
+// ignore_for_file:argument_type_not_assignable, invalid_assignment
+// ignore_for_file:prefer_single_quotes, prefer_generic_function_type_aliases
+// ignore_for_file:comment_references
+
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:intl/intl.dart';
+import 'package:intl/message_lookup_by_library.dart';
+import 'package:intl/src/intl_helpers.dart';
+
+import 'messages_en.dart' as messages_en;
+
+typedef Future<dynamic> LibraryLoader();
+Map<String, LibraryLoader> _deferredLibraries = {
+  'en': () => new SynchronousFuture(null),
+};
+
+MessageLookupByLibrary? _findExact(String localeName) {
+  switch (localeName) {
+    case 'en':
+      return messages_en.messages;
+    default:
+      return null;
+  }
+}
+
+/// User programs should call this before using [localeName] for messages.
+Future<bool> initializeMessages(String localeName) {
+  var availableLocale = Intl.verifiedLocale(
+    localeName,
+    (locale) => _deferredLibraries[locale] != null,
+    onFailure: (_) => null,
+  );
+  if (availableLocale == null) {
+    return new SynchronousFuture(false);
+  }
+  var lib = _deferredLibraries[availableLocale];
+  lib == null ? new SynchronousFuture(false) : lib();
+  initializeInternalMessageLookup(() => new CompositeMessageLookup());
+  messageLookup.addLocale(availableLocale, _findGeneratedMessagesFor);
+  return new SynchronousFuture(true);
+}
+
+bool _messagesExistFor(String locale) {
+  try {
+    return _findExact(locale) != null;
+  } catch (e) {
+    return false;
+  }
+}
+
+MessageLookupByLibrary? _findGeneratedMessagesFor(String locale) {
+  var actualLocale = Intl.verifiedLocale(
+    locale,
+    _messagesExistFor,
+    onFailure: (_) => null,
+  );
+  if (actualLocale == null) return null;
+  return _findExact(actualLocale);
+}

flutter/lib/generated/intl/messages_en.dart

@@ -0,0 +1,25 @@
+// DO NOT EDIT. This is code generated via package:intl/generate_localized.dart
+// This is a library that provides messages for a en locale. All the
+// messages from the main program should be duplicated here with the same
+// function name.
+
+// Ignore issues from commonly used lints in this file.
+// ignore_for_file:unnecessary_brace_in_string_interps, unnecessary_new
+// ignore_for_file:prefer_single_quotes,comment_references, directives_ordering
+// ignore_for_file:annotate_overrides,prefer_generic_function_type_aliases
+// ignore_for_file:unused_import, file_names, avoid_escaping_inner_quotes
+// ignore_for_file:unnecessary_string_interpolations, unnecessary_string_escapes
+
+import 'package:intl/intl.dart';
+import 'package:intl/message_lookup_by_library.dart';
+
+final messages = new MessageLookup();
+
+typedef String MessageIfAbsent(String messageStr, List<dynamic> args);
+
+class MessageLookup extends MessageLookupByLibrary {
+  String get localeName => 'en';
+
+  final messages = _notInlinedMessages(_notInlinedMessages);
+  static Map<String, Function> _notInlinedMessages(_) => <String, Function>{};
+}

flutter/lib/generated/l10n.dart

@@ -0,0 +1,80 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+import 'intl/messages_all.dart';
+
+// **************************************************************************
+// Generator: Flutter Intl IDE plugin
+// Made by Localizely
+// **************************************************************************
+
+// ignore_for_file: non_constant_identifier_names, lines_longer_than_80_chars
+// ignore_for_file: join_return_with_assignment, prefer_final_in_for_each
+// ignore_for_file: avoid_redundant_argument_values, avoid_escaping_inner_quotes
+
+class S {
+  S();
+
+  static S? _current;
+
+  static S get current {
+    assert(
+      _current != null,
+      'No instance of S was loaded. Try to initialize the S delegate before accessing S.current.',
+    );
+    return _current!;
+  }
+
+  static const AppLocalizationDelegate delegate = AppLocalizationDelegate();
+
+  static Future<S> load(Locale locale) {
+    final name = (locale.countryCode?.isEmpty ?? false)
+        ? locale.languageCode
+        : locale.toString();
+    final localeName = Intl.canonicalizedLocale(name);
+    return initializeMessages(localeName).then((_) {
+      Intl.defaultLocale = localeName;
+      final instance = S();
+      S._current = instance;
+
+      return instance;
+    });
+  }
+
+  static S of(BuildContext context) {
+    final instance = S.maybeOf(context);
+    assert(
+      instance != null,
+      'No instance of S present in the widget tree. Did you add S.delegate in localizationsDelegates?',
+    );
+    return instance!;
+  }
+
+  static S? maybeOf(BuildContext context) {
+    return Localizations.of<S>(context, S);
+  }
+}
+
+class AppLocalizationDelegate extends LocalizationsDelegate<S> {
+  const AppLocalizationDelegate();
+
+  List<Locale> get supportedLocales {
+    return const <Locale>[Locale.fromSubtags(languageCode: 'en')];
+  }
+
+  @override
+  bool isSupported(Locale locale) => _isSupported(locale);
+  @override
+  Future<S> load(Locale locale) => S.load(locale);
+  @override
+  bool shouldReload(AppLocalizationDelegate old) => false;
+
+  bool _isSupported(Locale locale) {
+    for (var supportedLocale in supportedLocales) {
+      if (supportedLocale.languageCode == locale.languageCode) {
+        return true;
+      }
+    }
+    return false;
+  }
+}

flutter/lib/l10n/app_en.arb

@@ -517,9 +517,10 @@
   "adminInlineCategory": "Category (inline)",
   "adminNoCategory": "No category",
   "adminRestoreAction": "Restore",
-  "required": "Required",
-  "logoutAction": "Log out",
-  "adminAiDescription": "Overview of AI features exposed by the backend.",
-  "adminPagePrefix": "Page: ",
+  "profileDeleteConfirmTitle": "Confirm deletion",
+  "profileDeleteConfirmMessage": "Are you sure you want to delete your profile? All your data will be permanently deleted.",
+  "profileDeleteAction": "Delete my profile",
+  "profileDeletedMessage": "Your profile has been deleted."
+}
   "profileDatabaseDescription": "The database tab covers your main areas for inventory and products."
 }

flutter/lib/l10n/app_sv.arb

@@ -521,5 +521,8 @@
   "logoutAction": "Logga ut",
   "adminAiDescription": "Översikt över AI-funktioner som backend exponerar.",
   "adminPagePrefix": "Sida: ",
-  "profileDatabaseDescription": "Databasfliken samlar dina huvudområden för lager och produkter."
+  "profileDeleteConfirmTitle": "Bekräfta radering",
+  "profileDeleteConfirmMessage": "Är du säker på att du vill ta bort din profil? Alla dina data kommer att raderas permanent.",
+  "profileDeleteAction": "Ta bort min profil",
+  "profileDeletedMessage": "Din profil har tagits bort."
 }

flutter/lib/l10n/intl_en.arb

@@ -0,0 +1 @@
+{}