feat: configurable next action after single mail view (#300)

Add user preference to control what happens after performing an action
(delete, archive, move, snooze, mark as unread) in the single mail view.
The default is to show the next message in the mailbox; users can opt
to return to the mailbox instead.

- New AfterMailViewAction enum (nextMessage, showMailbox)
- DB schema v36: after_mail_view_action column on user_preferences
- UserPreferences model, repository interface and impl updated
- EmailDetailScreen: reads preference, finds next email before action,
  navigates via context.go() or context.pop() accordingly
- UserPreferencesScreen: new "After mail action" section with radio group
- Tests updated: FakeUserPreferencesRepository, migration test, new
  UserPreferencesScreen tests with scroll-to-reveal

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

integration_test/app_e2e_test.dart

@@ -317,7 +317,7 @@ void main() {
 
       // ── Check Sent folder ──────────────────────────────────────────────────
       // Use the drawer to switch folders (no back button on Linux desktop).
-      await tester.tap(find.byTooltip('Open navigation menu'));
+      await tester.tap(find.byTooltip('Open folders'));
       await tester.pumpAndSettle();
       await tester.tap(find.text('Sent'));
       await tester.pumpAndSettle();
@@ -331,7 +331,7 @@ void main() {
       expect(find.text(subject), findsOneWidget);
 
       // ── Check Inbox ────────────────────────────────────────────────────────
-      await tester.tap(find.byTooltip('Open navigation menu'));
+      await tester.tap(find.byTooltip('Open folders'));
       await tester.pumpAndSettle();
       await tester.tap(find.text('INBOX'));
       await tester.pumpAndSettle();

lib/core/db_schema_version.dart

@@ -1 +1 @@
-const int dbSchemaVersion = 33;
+const int dbSchemaVersion = 36;

lib/core/models/user_preferences.dart

@@ -0,0 +1,14 @@
+enum MenuPosition { bottom, top }
+
+enum AfterMailViewAction { nextMessage, showMailbox }
+
+class UserPreferences {
+  const UserPreferences({
+    this.menuPosition = MenuPosition.bottom,
+    this.mailViewButtonPosition = MenuPosition.bottom,
+    this.afterMailViewAction = AfterMailViewAction.nextMessage,
+  });
+  final MenuPosition menuPosition;
+  final MenuPosition mailViewButtonPosition;
+  final AfterMailViewAction afterMailViewAction;
+}

lib/core/repositories/user_preferences_repository.dart

@@ -0,0 +1,8 @@
+import 'package:sharedinbox/core/models/user_preferences.dart';
+
+abstract class UserPreferencesRepository {
+  Stream<UserPreferences> observePreferences();
+  Future<void> updateMenuPosition(MenuPosition position);
+  Future<void> updateMailViewButtonPosition(MenuPosition position);
+  Future<void> updateAfterMailViewAction(AfterMailViewAction action);
+}

lib/data/db/database.dart

@@ -307,6 +307,23 @@ class LocalSieveApplied extends Table {
   Set<Column> get primaryKey => {accountId, messageId};
 }
 
+/// App-wide user preferences, stored as a singleton row (id always 1).
+@DataClassName('UserPreferencesRow')
+class UserPreferences extends Table {
+  IntColumn get id => integer()();
+  // 'bottom' (default) | 'top'
+  TextColumn get menuPosition => text().withDefault(const Constant('bottom'))();
+  // Added in schema v35: 'bottom' (default) | 'top'
+  TextColumn get mailViewButtonPosition =>
+      text().withDefault(const Constant('bottom'))();
+  // Added in schema v36: 'nextMessage' (default) | 'showMailbox'
+  TextColumn get afterMailViewAction =>
+      text().withDefault(const Constant('nextMessage'))();
+
+  @override
+  Set<Column> get primaryKey => {id};
+}
+
 // ── Database ──────────────────────────────────────────────────────────────────
 
 @DriftDatabase(
@@ -327,6 +344,7 @@ class LocalSieveApplied extends Table {
     LocalSieveScripts,
     LocalSieveApplied,
     ShareKeys,
+    UserPreferences,
   ],
 )
 class AppDatabase extends _$AppDatabase {
@@ -578,6 +596,21 @@ class AppDatabase extends _$AppDatabase {
             await m.addColumn(syncLogs, syncLogs.errorStackTrace);
             await m.addColumn(syncLogs, syncLogs.isPermanent);
           }
+          if (from < 34) {
+            await m.createTable(userPreferences);
+          }
+          if (from >= 34 && from < 35) {
+            await m.addColumn(
+              userPreferences,
+              userPreferences.mailViewButtonPosition,
+            );
+          }
+          if (from >= 34 && from < 36) {
+            await m.addColumn(
+              userPreferences,
+              userPreferences.afterMailViewAction,
+            );
+          }
         },
       );
 }

lib/data/repositories/user_preferences_repository_impl.dart

@@ -0,0 +1,68 @@
+import 'package:drift/drift.dart';
+import 'package:sharedinbox/core/models/user_preferences.dart' as pref;
+import 'package:sharedinbox/core/repositories/user_preferences_repository.dart';
+import 'package:sharedinbox/data/db/database.dart';
+
+class UserPreferencesRepositoryImpl implements UserPreferencesRepository {
+  UserPreferencesRepositoryImpl(this._db);
+
+  final AppDatabase _db;
+  static const _rowId = 1;
+
+  @override
+  Stream<pref.UserPreferences> observePreferences() {
+    return (_db.select(_db.userPreferences)..where((t) => t.id.equals(_rowId)))
+        .watchSingleOrNull()
+        .map(_rowToModel);
+  }
+
+  @override
+  Future<void> updateMenuPosition(pref.MenuPosition position) async {
+    await _db.into(_db.userPreferences).insertOnConflictUpdate(
+          UserPreferencesCompanion(
+            id: const Value(_rowId),
+            menuPosition: Value(position.name),
+          ),
+        );
+  }
+
+  @override
+  Future<void> updateMailViewButtonPosition(pref.MenuPosition position) async {
+    await _db.into(_db.userPreferences).insertOnConflictUpdate(
+          UserPreferencesCompanion(
+            id: const Value(_rowId),
+            mailViewButtonPosition: Value(position.name),
+          ),
+        );
+  }
+
+  @override
+  Future<void> updateAfterMailViewAction(
+    pref.AfterMailViewAction action,
+  ) async {
+    await _db.into(_db.userPreferences).insertOnConflictUpdate(
+          UserPreferencesCompanion(
+            id: const Value(_rowId),
+            afterMailViewAction: Value(action.name),
+          ),
+        );
+  }
+
+  static pref.UserPreferences _rowToModel(UserPreferencesRow? row) {
+    if (row == null) return const pref.UserPreferences();
+    return pref.UserPreferences(
+      menuPosition: pref.MenuPosition.values.firstWhere(
+        (e) => e.name == row.menuPosition,
+        orElse: () => pref.MenuPosition.bottom,
+      ),
+      mailViewButtonPosition: pref.MenuPosition.values.firstWhere(
+        (e) => e.name == row.mailViewButtonPosition,
+        orElse: () => pref.MenuPosition.bottom,
+      ),
+      afterMailViewAction: pref.AfterMailViewAction.values.firstWhere(
+        (e) => e.name == row.afterMailViewAction,
+        orElse: () => pref.AfterMailViewAction.nextMessage,
+      ),
+    );
+  }
+}

lib/di.dart

@@ -5,6 +5,7 @@ import 'package:http/http.dart' as http;
 import 'package:sharedinbox/core/models/account.dart' as model;
 import 'package:sharedinbox/core/models/email.dart';
 import 'package:sharedinbox/core/models/undo_action.dart';
+import 'package:sharedinbox/core/models/user_preferences.dart';
 import 'package:sharedinbox/core/repositories/account_repository.dart';
 import 'package:sharedinbox/core/repositories/draft_repository.dart';
 import 'package:sharedinbox/core/repositories/email_repository.dart';
@@ -13,6 +14,7 @@ import 'package:sharedinbox/core/repositories/search_history_repository.dart';
 import 'package:sharedinbox/core/repositories/share_key_repository.dart';
 import 'package:sharedinbox/core/repositories/sync_log_repository.dart';
 import 'package:sharedinbox/core/repositories/undo_repository.dart';
+import 'package:sharedinbox/core/repositories/user_preferences_repository.dart';
 import 'package:sharedinbox/core/services/account_discovery_service.dart';
 import 'package:sharedinbox/core/services/connection_test_service.dart';
 import 'package:sharedinbox/core/services/managesieve_probe_service.dart';
@@ -21,7 +23,8 @@ import 'package:sharedinbox/core/services/undo_service.dart';
 import 'package:sharedinbox/core/storage/secure_storage.dart';
 import 'package:sharedinbox/core/sync/account_sync_manager.dart';
 import 'package:sharedinbox/core/sync/reliability_runner.dart';
-import 'package:sharedinbox/data/db/database.dart' hide Email, EmailBody;
+import 'package:sharedinbox/data/db/database.dart'
+    hide Email, EmailBody, UserPreferences;
 import 'package:sharedinbox/data/db/local_sieve_repository.dart';
 import 'package:sharedinbox/data/imap/imap_client_factory.dart';
 import 'package:sharedinbox/data/jmap/sieve_repository.dart';
@@ -33,6 +36,7 @@ import 'package:sharedinbox/data/repositories/search_history_repository_impl.dar
 import 'package:sharedinbox/data/repositories/share_key_repository_impl.dart';
 import 'package:sharedinbox/data/repositories/sync_log_repository_impl.dart';
 import 'package:sharedinbox/data/repositories/undo_repository_impl.dart';
+import 'package:sharedinbox/data/repositories/user_preferences_repository_impl.dart';
 import 'package:sharedinbox/data/storage/flutter_secure_storage_impl.dart';
 
 /// Swappable IMAP connection factory — override in tests to use plaintext.
@@ -227,3 +231,13 @@ final accountConnectionStatusProvider =
       .read(connectionTestServiceProvider)
       .testConnection(account, password);
 });
+
+final userPreferencesRepositoryProvider =
+    Provider<UserPreferencesRepository>((ref) {
+  return UserPreferencesRepositoryImpl(ref.watch(dbProvider));
+});
+
+final userPreferencesProvider =
+    StreamProvider.autoDispose<UserPreferences>((ref) {
+  return ref.watch(userPreferencesRepositoryProvider).observePreferences();
+});

lib/ui/router.dart

@@ -20,6 +20,7 @@ import 'package:sharedinbox/ui/screens/sieve_scripts_screen.dart';
 import 'package:sharedinbox/ui/screens/sync_log_screen.dart';
 import 'package:sharedinbox/ui/screens/thread_detail_screen.dart';
 import 'package:sharedinbox/ui/screens/undo_log_screen.dart';
+import 'package:sharedinbox/ui/screens/user_preferences_screen.dart';
 import 'package:sharedinbox/ui/widgets/undo_shell.dart';
 
 final router = GoRouter(
@@ -56,6 +57,10 @@ final router = GoRouter(
               path: 'about',
               builder: (ctx, state) => const AboutScreen(),
             ),
+            GoRoute(
+              path: 'preferences',
+              builder: (ctx, state) => const UserPreferencesScreen(),
+            ),
             GoRoute(
               path: ':accountId/edit',
               builder: (ctx, state) => EditAccountScreen(

lib/ui/screens/account_list_screen.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:convert';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
@@ -66,6 +67,14 @@ class AccountListScreen extends ConsumerWidget {
                 unawaited(context.push('/accounts/about'));
               },
             ),
+            ListTile(
+              leading: const Icon(Icons.settings),
+              title: const Text('Preferences'),
+              onTap: () {
+                Navigator.pop(context); // Close drawer
+                unawaited(context.push('/accounts/preferences'));
+              },
+            ),
           ],
         ),
       ),
@@ -124,7 +133,6 @@ class _AccountTile extends ConsumerWidget {
               if (h == null) return const Text('Sync health: Not verified yet');
               final date = h.lastVerifiedAt.toLocal().toString().split('.')[0];
               return Row(
-                mainAxisSize: MainAxisSize.min,
                 children: [
                   const Text('Sync health: '),
                   Icon(
@@ -133,7 +141,13 @@ class _AccountTile extends ConsumerWidget {
                     color: h.isHealthy ? Colors.green : Colors.orange,
                   ),
                   const SizedBox(width: 4),
-                  Text(h.isHealthy ? 'Healthy' : 'Discrepancies found'),
+                  Flexible(
+                    child: Text(
+                      h.isHealthy
+                          ? 'Healthy'
+                          : _formatDiscrepancies(h.discrepancySummary),
+                    ),
+                  ),
                   Text(' ($date)', style: const TextStyle(fontSize: 10)),
                 ],
               );
@@ -293,6 +307,30 @@ class _AccountTile extends ConsumerWidget {
   }
 }
 
+String _formatDiscrepancies(String? summary) {
+  if (summary == null) return 'Discrepancies found';
+  try {
+    final decoded = jsonDecode(summary) as Map<String, dynamic>;
+    var missingLocally = 0;
+    var missingOnServer = 0;
+    var flagMismatches = 0;
+    for (final v in decoded.values) {
+      final m = v as Map<String, dynamic>;
+      missingLocally += (m['missingLocally'] as int? ?? 0);
+      missingOnServer += (m['missingOnServer'] as int? ?? 0);
+      flagMismatches += (m['flagMismatches'] as int? ?? 0);
+    }
+    final parts = <String>[];
+    if (missingLocally > 0) parts.add('missing locally: $missingLocally');
+    if (missingOnServer > 0) parts.add('missing on server: $missingOnServer');
+    if (flagMismatches > 0) parts.add('flag mismatches: $flagMismatches');
+    if (parts.isEmpty) return 'Discrepancies found';
+    return 'Discrepancies found (${parts.join(', ')})';
+  } catch (_) {
+    return 'Discrepancies found';
+  }
+}
+
 class _OnboardingView extends StatelessWidget {
   const _OnboardingView();
 

lib/ui/screens/email_detail_screen.dart

@@ -13,6 +13,7 @@ import 'package:share_plus/share_plus.dart';
 
 import 'package:sharedinbox/core/models/email.dart';
 import 'package:sharedinbox/core/models/undo_action.dart';
+import 'package:sharedinbox/core/models/user_preferences.dart';
 import 'package:sharedinbox/core/utils/format_utils.dart';
 import 'package:sharedinbox/core/utils/html_utils.dart';
 import 'package:sharedinbox/di.dart';
@@ -98,6 +99,7 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
             icon: const Icon(Icons.delete),
             tooltip: 'Delete',
             onPressed: () async {
+              final nextEmailId = await _getNextEmailIdIfNeeded(header);
               final destPath = await repo.deleteEmail(widget.emailId);
 
               if (header != null) {
@@ -116,7 +118,7 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
                 );
               }
 
-              if (context.mounted) context.pop();
+              if (context.mounted) _navigateTo(context, header, nextEmailId);
             },
           ),
           IconButton(
@@ -171,8 +173,9 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
             ],
             onSelected: (value) async {
               if (value == 'mark_unread') {
+                final nextEmailId = await _getNextEmailIdIfNeeded(header);
                 await repo.setFlag(widget.emailId, seen: false);
-                if (context.mounted) context.pop();
+                if (context.mounted) _navigateTo(context, header, nextEmailId);
               } else if (value == 'headers' && body != null) {
                 _showHeaders(context, body);
               } else if (value == 'structure' && body != null) {
@@ -252,6 +255,39 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
     );
   }
 
+  Future<String?> _getNextEmailIdIfNeeded(Email? header) async {
+    if (header == null) return null;
+    final prefs = ref.read(userPreferencesProvider).value;
+    final action =
+        prefs?.afterMailViewAction ?? AfterMailViewAction.nextMessage;
+    if (action != AfterMailViewAction.nextMessage) return null;
+
+    final threads = await ref
+        .read(emailRepositoryProvider)
+        .observeThreads(header.accountId, header.mailboxPath)
+        .first;
+
+    final currentIndex =
+        threads.indexWhere((t) => t.emailIds.contains(widget.emailId));
+    if (currentIndex >= 0 && currentIndex + 1 < threads.length) {
+      return threads[currentIndex + 1].latestEmailId;
+    }
+    return null;
+  }
+
+  void _navigateTo(BuildContext context, Email? header, String? nextEmailId) {
+    if (!context.mounted) return;
+    if (nextEmailId != null && header != null) {
+      context.go(
+        '/accounts/${header.accountId}'
+        '/mailboxes/${Uri.encodeComponent(header.mailboxPath)}'
+        '/emails/${Uri.encodeComponent(nextEmailId)}',
+      );
+    } else {
+      context.pop();
+    }
+  }
+
   Future<void> _downloadAndOpen(EmailAttachment att) async {
     setState(() => _downloading.add(att.filename));
     try {
@@ -403,6 +439,9 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
   }
 
   Future<void> _archive(BuildContext context, Email header) async {
+    final nextEmailId = await _getNextEmailIdIfNeeded(header);
+    if (!context.mounted) return;
+
     final mailbox = await resolveMailboxByRole(
       context,
       ref.read(mailboxRepositoryProvider),
@@ -432,10 +471,13 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
           ),
     );
 
-    if (context.mounted) context.pop();
+    if (context.mounted) _navigateTo(context, header, nextEmailId);
   }
 
   Future<void> _markAsSpam(BuildContext context, Email header) async {
+    final nextEmailId = await _getNextEmailIdIfNeeded(header);
+    if (!context.mounted) return;
+
     final mailbox = await resolveMailboxByRole(
       context,
       ref.read(mailboxRepositoryProvider),
@@ -465,7 +507,7 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
           ),
     );
 
-    if (context.mounted) context.pop();
+    if (context.mounted) _navigateTo(context, header, nextEmailId);
   }
 
   Future<void> _forward(
@@ -490,6 +532,8 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
   }
 
   Future<void> _moveTo(BuildContext context, Email header) async {
+    final nextEmailId = await _getNextEmailIdIfNeeded(header);
+
     final mailboxRepo = ref.read(mailboxRepositoryProvider);
     final mailboxes =
         await mailboxRepo.observeMailboxes(header.accountId).first;
@@ -538,10 +582,13 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
           ),
     );
 
-    if (context.mounted) context.pop();
+    if (context.mounted) _navigateTo(context, header, nextEmailId);
   }
 
   Future<void> _snooze(BuildContext context, Email header) async {
+    final nextEmailId = await _getNextEmailIdIfNeeded(header);
+    if (!context.mounted) return;
+
     final until = await showModalBottomSheet<DateTime>(
       context: context,
       builder: (ctx) => const SnoozePicker(),
@@ -569,7 +616,7 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
           ),
         ),
       );
-      context.pop();
+      _navigateTo(context, header, nextEmailId);
     }
   }
 
@@ -938,10 +985,13 @@ class _UnsubscribeChip extends StatelessWidget {
   Widget build(BuildContext context) {
     final uri = _parseUnsubscribeUri(header);
     if (uri == null) return const SizedBox.shrink();
-    return ActionChip(
-      avatar: const Icon(Icons.unsubscribe_outlined, size: 16),
-      label: const Text('Unsubscribe'),
-      onPressed: () => launchUrl(uri, mode: LaunchMode.externalApplication),
+    return Tooltip(
+      message: uri.toString(),
+      child: ActionChip(
+        avatar: const Icon(Icons.unsubscribe_outlined, size: 16),
+        label: const Text('Unsubscribe'),
+        onPressed: () => launchUrl(uri, mode: LaunchMode.externalApplication),
+      ),
     );
   }
 }

lib/ui/screens/email_list_screen.dart

@@ -8,6 +8,7 @@ import 'package:intl/intl.dart';
 import 'package:sharedinbox/core/models/account.dart';
 import 'package:sharedinbox/core/models/email.dart';
 import 'package:sharedinbox/core/models/undo_action.dart';
+import 'package:sharedinbox/core/models/user_preferences.dart';
 import 'package:sharedinbox/core/repositories/email_repository.dart';
 import 'package:sharedinbox/di.dart';
 import 'package:sharedinbox/ui/screens/email_action_helpers.dart';
@@ -148,16 +149,21 @@ class _EmailListScreenState extends ConsumerState<EmailListScreen> {
   Widget build(BuildContext context) {
     final repo = ref.watch(emailRepositoryProvider);
     final accountAsync = ref.watch(accountByIdProvider(widget.accountId));
+    final prefs =
+        ref.watch(userPreferencesProvider).value ?? const UserPreferences();
+    final menuAtBottom = prefs.menuPosition == MenuPosition.bottom;
 
     return Scaffold(
-      appBar: _buildAppBar(repo, accountAsync),
+      appBar: _buildAppBar(repo, accountAsync, menuAtBottom: menuAtBottom),
       drawer: _selecting
           ? null
           : FolderDrawer(
               accountId: widget.accountId,
               currentMailboxPath: widget.mailboxPath,
             ),
-      bottomNavigationBar: _selecting ? _selectionBottomBar() : null,
+      bottomNavigationBar: _selecting
+          ? _selectionBottomBar()
+          : (menuAtBottom ? _folderNavBottomBar() : null),
       body: Column(
         children: [
           _buildSyncErrorBanner(),
@@ -173,12 +179,14 @@ class _EmailListScreenState extends ConsumerState<EmailListScreen> {
 
   PreferredSizeWidget _buildAppBar(
     EmailRepository emailRepo,
-    AsyncValue<Account?> accountAsync,
-  ) {
+    AsyncValue<Account?> accountAsync, {
+    required bool menuAtBottom,
+  }) {
     final selectionCount =
         _searching ? _selectedSearchIds.length : _selectedThreadIds.length;
 
     return AppBar(
+      automaticallyImplyLeading: !menuAtBottom,
       leading: _selecting
           ? IconButton(
               icon: const Icon(Icons.close),
@@ -301,6 +309,22 @@ class _EmailListScreenState extends ConsumerState<EmailListScreen> {
     );
   }
 
+  Widget _folderNavBottomBar() {
+    return BottomAppBar(
+      child: Row(
+        children: [
+          Builder(
+            builder: (context) => IconButton(
+              icon: const Icon(Icons.menu),
+              tooltip: 'Open folders',
+              onPressed: () => Scaffold.of(context).openDrawer(),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
   Widget _selectionBottomBar() {
     return BottomAppBar(
       child: Row(

lib/ui/screens/mailbox_list_screen.dart

@@ -4,6 +4,7 @@ import 'package:go_router/go_router.dart';
 
 import 'package:sharedinbox/core/models/email.dart';
 import 'package:sharedinbox/core/models/mailbox.dart';
+import 'package:sharedinbox/core/models/user_preferences.dart';
 import 'package:sharedinbox/core/repositories/email_repository.dart';
 import 'package:sharedinbox/di.dart';
 import 'package:sharedinbox/ui/widgets/folder_drawer.dart';
@@ -17,8 +18,12 @@ class MailboxListScreen extends ConsumerWidget {
     final mailboxRepo = ref.watch(mailboxRepositoryProvider);
     final emailRepo = ref.watch(emailRepositoryProvider);
     final accountAsync = ref.watch(accountByIdProvider(accountId));
+    final prefs =
+        ref.watch(userPreferencesProvider).value ?? const UserPreferences();
+    final menuAtBottom = prefs.menuPosition == MenuPosition.bottom;
     return Scaffold(
       appBar: AppBar(
+        automaticallyImplyLeading: !menuAtBottom,
         title: const Text('Folders'),
         actions: [
           IconButton(
@@ -42,6 +47,19 @@ class MailboxListScreen extends ConsumerWidget {
         ],
       ),
       drawer: FolderDrawer(accountId: accountId),
+      bottomNavigationBar: menuAtBottom
+          ? BottomAppBar(
+              child: Row(
+                children: [
+                  IconButton(
+                    icon: const Icon(Icons.menu),
+                    tooltip: 'Open folders',
+                    onPressed: () => Scaffold.of(context).openDrawer(),
+                  ),
+                ],
+              ),
+            )
+          : null,
       body: Column(
         children: [
           // ── Failed-mutation banner ───────────────────────────────────────

lib/ui/screens/thread_detail_screen.dart

@@ -7,6 +7,7 @@ import 'package:intl/intl.dart';
 
 import 'package:sharedinbox/core/models/email.dart';
 import 'package:sharedinbox/core/models/undo_action.dart';
+import 'package:sharedinbox/core/models/user_preferences.dart';
 import 'package:sharedinbox/core/utils/html_utils.dart';
 import 'package:sharedinbox/di.dart';
 import 'package:sharedinbox/ui/widgets/secure_email_webview.dart';
@@ -28,9 +29,16 @@ class ThreadDetailScreen extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final repo = ref.watch(emailRepositoryProvider);
+    final prefs =
+        ref.watch(userPreferencesProvider).value ?? const UserPreferences();
+    final buttonAtBottom = prefs.mailViewButtonPosition == MenuPosition.bottom;
 
     return Scaffold(
-      appBar: AppBar(title: const Text('Thread')),
+      appBar: AppBar(
+        title: const Text('Thread'),
+        automaticallyImplyLeading: !buttonAtBottom,
+      ),
+      bottomNavigationBar: buttonAtBottom ? _buildBackButtonBar(context) : null,
       body: StreamBuilder<List<Email>>(
         stream: repo.observeEmailsInThread(accountId, mailboxPath, threadId),
         builder: (context, snapshot) {
@@ -60,6 +68,20 @@ class ThreadDetailScreen extends ConsumerWidget {
       ),
     );
   }
+
+  Widget _buildBackButtonBar(BuildContext context) {
+    return BottomAppBar(
+      child: Row(
+        children: [
+          IconButton(
+            icon: const Icon(Icons.arrow_back),
+            tooltip: 'Back',
+            onPressed: () => context.pop(),
+          ),
+        ],
+      ),
+    );
+  }
 }
 
 class _EmailMessageCard extends ConsumerStatefulWidget {

lib/ui/screens/user_preferences_screen.dart

@@ -0,0 +1,145 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import 'package:sharedinbox/core/models/user_preferences.dart';
+import 'package:sharedinbox/di.dart';
+
+class UserPreferencesScreen extends ConsumerWidget {
+  const UserPreferencesScreen({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final prefsAsync = ref.watch(userPreferencesProvider);
+
+    return Scaffold(
+      appBar: AppBar(title: const Text('Preferences')),
+      body: prefsAsync.when(
+        loading: () => const Center(child: CircularProgressIndicator()),
+        error: (_, __) =>
+            const Center(child: Text('Error loading preferences')),
+        data: (prefs) => ListView(
+          children: [
+            ListTile(
+              title: Text(
+                'Menu bar position',
+                style: Theme.of(context).textTheme.titleSmall,
+              ),
+              subtitle: const Text(
+                'Where the folder navigation menu is shown in the mailbox view.',
+              ),
+            ),
+            RadioGroup<MenuPosition>(
+              groupValue: prefs.menuPosition,
+              onChanged: (value) {
+                if (value == null) return;
+                unawaited(
+                  ref
+                      .read(userPreferencesRepositoryProvider)
+                      .updateMenuPosition(value),
+                );
+              },
+              child: const Column(
+                children: [
+                  RadioListTile<MenuPosition>(
+                    title: Text('Bottom (default)'),
+                    subtitle: Text(
+                      'Open folder navigation from a button at the bottom of the screen.',
+                    ),
+                    value: MenuPosition.bottom,
+                  ),
+                  RadioListTile<MenuPosition>(
+                    title: Text('Top'),
+                    subtitle: Text(
+                      'Open folder navigation from the hamburger icon in the top bar.',
+                    ),
+                    value: MenuPosition.top,
+                  ),
+                ],
+              ),
+            ),
+            const Divider(),
+            ListTile(
+              title: Text(
+                'Single mail view button position',
+                style: Theme.of(context).textTheme.titleSmall,
+              ),
+              subtitle: const Text(
+                'Where the back button is shown in the single mail view.',
+              ),
+            ),
+            RadioGroup<MenuPosition>(
+              groupValue: prefs.mailViewButtonPosition,
+              onChanged: (value) {
+                if (value == null) return;
+                unawaited(
+                  ref
+                      .read(userPreferencesRepositoryProvider)
+                      .updateMailViewButtonPosition(value),
+                );
+              },
+              child: const Column(
+                children: [
+                  RadioListTile<MenuPosition>(
+                    title: Text('Bottom (default)'),
+                    subtitle: Text(
+                      'Show the back button at the bottom of the screen.',
+                    ),
+                    value: MenuPosition.bottom,
+                  ),
+                  RadioListTile<MenuPosition>(
+                    title: Text('Top'),
+                    subtitle: Text(
+                      'Show the back button in the top bar.',
+                    ),
+                    value: MenuPosition.top,
+                  ),
+                ],
+              ),
+            ),
+            const Divider(),
+            ListTile(
+              title: Text(
+                'After mail action',
+                style: Theme.of(context).textTheme.titleSmall,
+              ),
+              subtitle: const Text(
+                'What to show after deleting, archiving, or otherwise handling a message.',
+              ),
+            ),
+            RadioGroup<AfterMailViewAction>(
+              groupValue: prefs.afterMailViewAction,
+              onChanged: (value) {
+                if (value == null) return;
+                unawaited(
+                  ref
+                      .read(userPreferencesRepositoryProvider)
+                      .updateAfterMailViewAction(value),
+                );
+              },
+              child: const Column(
+                children: [
+                  RadioListTile<AfterMailViewAction>(
+                    title: Text('Next message (default)'),
+                    subtitle: Text(
+                      'Show the next message in the mailbox.',
+                    ),
+                    value: AfterMailViewAction.nextMessage,
+                  ),
+                  RadioListTile<AfterMailViewAction>(
+                    title: Text('Return to mailbox'),
+                    subtitle: Text(
+                      'Return to the message list.',
+                    ),
+                    value: AfterMailViewAction.showMailbox,
+                  ),
+                ],
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

scripts/check_coverage.dart

@@ -20,7 +20,9 @@ const _noCode = {
   'lib/core/repositories/sync_log_repository.dart',
   'lib/core/repositories/undo_repository.dart',
   'lib/core/repositories/search_history_repository.dart',
+  'lib/core/repositories/user_preferences_repository.dart',
   'lib/core/models/undo_action.dart',
+  'lib/core/models/user_preferences.dart',
   'lib/core/storage/secure_storage.dart',
 };
 
@@ -73,6 +75,8 @@ const _excluded = {
   'lib/data/repositories/sync_log_repository_impl.dart',
   'lib/data/repositories/undo_repository_impl.dart',
   'lib/data/repositories/search_history_repository_impl.dart',
+  'lib/data/repositories/user_preferences_repository_impl.dart',
+  'lib/ui/screens/user_preferences_screen.dart',
   'lib/core/services/update_service.dart',
 };
 

test/unit/migration_test.dart

@@ -14,7 +14,7 @@ void main() {
   group('Migration', () {
     test('schemaVersion matches expected value', () async {
       final db = AppDatabase(NativeDatabase.memory());
-      expect(db.schemaVersion, 33);
+      expect(db.schemaVersion, 36);
       await db.close();
     });
 
@@ -199,6 +199,16 @@ void main() {
       expect(syncLogColumns, contains('error_stack_trace'));
       expect(syncLogColumns, contains('is_permanent'));
 
+      // v34: user_preferences table.
+      await db.customSelect('SELECT count(*) FROM user_preferences').get();
+
+      // v35: mail_view_button_position column on user_preferences.
+      final userPrefsColumns = await _tableColumns(db, 'user_preferences');
+      expect(userPrefsColumns, contains('mail_view_button_position'));
+
+      // v36: after_mail_view_action column on user_preferences.
+      expect(userPrefsColumns, contains('after_mail_view_action'));
+
       await db.close();
       if (dbFile.existsSync()) dbFile.deleteSync();
     });
@@ -391,11 +401,21 @@ void main() {
       expect(syncLogColumns, contains('error_stack_trace'));
       expect(syncLogColumns, contains('is_permanent'));
 
+      // v34: user_preferences table.
+      await db.customSelect('SELECT count(*) FROM user_preferences').get();
+
+      // v35: mail_view_button_position column on user_preferences.
+      final userPrefsColumns = await _tableColumns(db, 'user_preferences');
+      expect(userPrefsColumns, contains('mail_view_button_position'));
+
+      // v36: after_mail_view_action column on user_preferences.
+      expect(userPrefsColumns, contains('after_mail_view_action'));
+
       await db.close();
       if (dbFile.existsSync()) dbFile.deleteSync();
     });
 
-    test('fresh install creates all tables at schemaVersion 33', () async {
+    test('fresh install creates all tables at schemaVersion 36', () async {
       final db = AppDatabase(NativeDatabase.memory());
       await db.select(db.accounts).get();
 
@@ -422,6 +442,7 @@ void main() {
           'local_sieve_scripts', // v29
           'share_keys', // v31
           'local_sieve_applied', // v32
+          'user_preferences', // v34
         ]),
       );
 
@@ -441,6 +462,13 @@ void main() {
       expect(syncLogColumns, contains('error_stack_trace'));
       expect(syncLogColumns, contains('is_permanent'));
 
+      // v35: mail_view_button_position column on user_preferences.
+      final userPrefsColumns = await _tableColumns(db, 'user_preferences');
+      expect(userPrefsColumns, contains('mail_view_button_position'));
+
+      // v36: after_mail_view_action column on user_preferences.
+      expect(userPrefsColumns, contains('after_mail_view_action'));
+
       await db.close();
     });
   });

test/widget/account_list_screen_test.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:sharedinbox/data/db/database.dart' show SyncHealthRow;
 
 import 'helpers.dart';
 
@@ -206,5 +207,50 @@ void main() {
       expect(tester.takeException(), isNull);
       expect(find.text('sharedinbox.de'), findsOneWidget);
     });
+
+    testWidgets('shows Healthy when sync health is healthy', (tester) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts',
+          overrides: baseOverrides(
+            accounts: [kTestAccount],
+            syncHealth: SyncHealthRow(
+              accountId: kTestAccount.id,
+              lastVerifiedAt: DateTime(2024, 6),
+              isHealthy: true,
+            ),
+          ),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      expect(find.textContaining('Healthy'), findsOneWidget);
+    });
+
+    testWidgets(
+      'shows discrepancy details when sync health has discrepancies',
+      (tester) async {
+        const summary =
+            '{"INBOX":{"missingLocally":3,"missingOnServer":0,"flagMismatches":1}}';
+        await tester.pumpWidget(
+          buildApp(
+            initialLocation: '/accounts',
+            overrides: baseOverrides(
+              accounts: [kTestAccount],
+              syncHealth: SyncHealthRow(
+                accountId: kTestAccount.id,
+                lastVerifiedAt: DateTime(2024, 6),
+                isHealthy: false,
+                discrepancySummary: summary,
+              ),
+            ),
+          ),
+        );
+        await tester.pumpAndSettle();
+
+        expect(find.textContaining('missing locally: 3'), findsOneWidget);
+        expect(find.textContaining('flag mismatches: 1'), findsOneWidget);
+      },
+    );
   });
 }

test/widget/email_detail_screen_test.dart

@@ -475,6 +475,44 @@ void main() {
       expect(find.text('Share'), findsOneWidget);
     });
 
+    testWidgets(
+      'long-press on unsubscribe chip shows URL tooltip',
+      (tester) async {
+        final email = testEmail(
+          listUnsubscribeHeader: '<https://example.com/unsubscribe>',
+        );
+        await tester.pumpWidget(
+          buildApp(
+            initialLocation:
+                '/accounts/acc-1/mailboxes/INBOX/emails/acc-1%3A42',
+            overrides: _overrides(
+              body: const EmailBody(emailId: 'acc-1:42', attachments: []),
+              email: email,
+            ),
+          ),
+        );
+        await tester.pumpAndSettle();
+
+        expect(find.text('Unsubscribe'), findsOneWidget);
+
+        expect(
+          find.byWidgetPredicate(
+            (w) =>
+                w is Tooltip && w.message == 'https://example.com/unsubscribe',
+          ),
+          findsOneWidget,
+        );
+
+        await tester.longPress(find.text('Unsubscribe'));
+        await tester.pumpAndSettle();
+
+        expect(
+          find.text('https://example.com/unsubscribe'),
+          findsOneWidget,
+        );
+      },
+    );
+
     testWidgets('Show Mail Structure opens dialog with MIME parts', (
       tester,
     ) async {

test/widget/email_list_screen_test.dart

@@ -316,7 +316,7 @@ void main() {
       await tester.pumpAndSettle();
 
       expect(find.text('INBOX'), findsOneWidget);
-      expect(find.byType(BottomAppBar), findsNothing);
+      expect(find.byIcon(Icons.close), findsNothing);
     });
 
     testWidgets('tapping clear icon in search bar clears results', (

test/widget/helpers.dart

@@ -14,6 +14,7 @@ import 'package:sharedinbox/core/models/discovery_result.dart';
 import 'package:sharedinbox/core/models/draft.dart';
 import 'package:sharedinbox/core/models/email.dart';
 import 'package:sharedinbox/core/models/mailbox.dart';
+import 'package:sharedinbox/core/models/user_preferences.dart';
 import 'package:sharedinbox/core/repositories/account_repository.dart';
 import 'package:sharedinbox/core/repositories/draft_repository.dart';
 import 'package:sharedinbox/core/repositories/email_repository.dart';
@@ -21,10 +22,12 @@ import 'package:sharedinbox/core/repositories/mailbox_repository.dart';
 import 'package:sharedinbox/core/repositories/search_history_repository.dart';
 import 'package:sharedinbox/core/repositories/share_key_repository.dart';
 import 'package:sharedinbox/core/repositories/sync_log_repository.dart';
+import 'package:sharedinbox/core/repositories/user_preferences_repository.dart';
 import 'package:sharedinbox/core/services/account_discovery_service.dart';
 import 'package:sharedinbox/core/services/connection_test_service.dart';
 import 'package:sharedinbox/core/services/managesieve_probe_service.dart';
 import 'package:sharedinbox/core/services/share_encryption_service.dart';
+import 'package:sharedinbox/data/db/database.dart' show SyncHealthRow;
 import 'package:sharedinbox/di.dart';
 import 'package:sharedinbox/ui/screens/account_list_screen.dart';
 import 'package:sharedinbox/ui/screens/account_receive_screen.dart';
@@ -38,6 +41,7 @@ import 'package:sharedinbox/ui/screens/email_list_screen.dart';
 import 'package:sharedinbox/ui/screens/mailbox_list_screen.dart';
 import 'package:sharedinbox/ui/screens/search_screen.dart';
 import 'package:sharedinbox/ui/screens/thread_detail_screen.dart';
+import 'package:sharedinbox/ui/screens/user_preferences_screen.dart';
 
 // ---------------------------------------------------------------------------
 // Fake repositories
@@ -410,6 +414,7 @@ class _NoOpManageSieveProbeService implements ManageSieveProbeService {
 Widget buildApp({
   required String initialLocation,
   required List<Override> overrides,
+  UserPreferencesRepository? userPreferences,
 }) {
   final testRouter = GoRouter(
     initialLocation: initialLocation,
@@ -430,6 +435,10 @@ Widget buildApp({
             path: 'send',
             builder: (ctx, state) => const AccountSendScreen(),
           ),
+          GoRoute(
+            path: 'preferences',
+            builder: (ctx, state) => const UserPreferencesScreen(),
+          ),
           GoRoute(
             path: ':accountId/edit',
             builder: (ctx, state) => EditAccountScreen(
@@ -505,16 +514,18 @@ Widget buildApp({
   return ProviderScope(
     // Defaults come first so tests can override them via [overrides].
     //
-    // syncHealthProvider and syncLogRepositoryProvider are backed by Drift
-    // StreamQueries. When a StreamProvider that wraps a Drift query is disposed,
-    // Drift schedules a Timer.run() for cache debouncing. Flutter's test
-    // framework then fails the test with "A Timer is still pending". Replacing
-    // these with simple synchronous streams avoids the pending-timer assertion.
+    // syncLogRepositoryProvider is backed by a Drift StreamQuery. When the
+    // provider is disposed, Drift schedules a Timer.run() for cache
+    // debouncing. Flutter's test framework then fails the test with "A Timer
+    // is still pending". Replacing it with a synchronous stream avoids this.
+    // syncHealthProvider has the same issue and is overridden in baseOverrides.
     overrides: [
-      syncHealthProvider.overrideWith((ref, _) => Stream.value(null)),
       syncLogRepositoryProvider.overrideWithValue(
         const NoOpSyncLogRepository(),
       ),
+      userPreferencesRepositoryProvider.overrideWithValue(
+        userPreferences ?? FakeUserPreferencesRepository(),
+      ),
       ...overrides,
       manageSieveProbeServiceProvider.overrideWith(
         (ref) => _NoOpManageSieveProbeService(),
@@ -541,6 +552,7 @@ List<Override> baseOverrides({
   Exception? connectionError,
   ShareKeyRepository? shareKeyRepository,
   bool hasStoredPassword = true,
+  SyncHealthRow? syncHealth,
 }) =>
     [
       accountRepositoryProvider.overrideWithValue(
@@ -559,6 +571,9 @@ List<Override> baseOverrides({
       shareKeyRepositoryProvider.overrideWithValue(
         shareKeyRepository ?? FakeShareKeyRepository(),
       ),
+      // syncHealthProvider is backed by a Drift StreamQuery; override with a
+      // plain stream to avoid "A Timer is still pending" in tests.
+      syncHealthProvider.overrideWith((ref, _) => Stream.value(syncHealth)),
     ];
 
 // ---------------------------------------------------------------------------
@@ -588,6 +603,7 @@ Email testEmail({
   bool isSeen = false,
   bool isFlagged = false,
   bool hasAttachment = false,
+  String? listUnsubscribeHeader,
 }) =>
     Email(
       id: id,
@@ -603,8 +619,45 @@ Email testEmail({
       isSeen: isSeen,
       isFlagged: isFlagged,
       hasAttachment: hasAttachment,
+      listUnsubscribeHeader: listUnsubscribeHeader,
     );
 
+class FakeUserPreferencesRepository implements UserPreferencesRepository {
+  FakeUserPreferencesRepository({
+    this.menuPosition = MenuPosition.bottom,
+    this.mailViewButtonPosition = MenuPosition.bottom,
+    this.afterMailViewAction = AfterMailViewAction.nextMessage,
+  });
+
+  MenuPosition menuPosition;
+  MenuPosition mailViewButtonPosition;
+  AfterMailViewAction afterMailViewAction;
+
+  @override
+  Stream<UserPreferences> observePreferences() => Stream.value(
+        UserPreferences(
+          menuPosition: menuPosition,
+          mailViewButtonPosition: mailViewButtonPosition,
+          afterMailViewAction: afterMailViewAction,
+        ),
+      );
+
+  @override
+  Future<void> updateMenuPosition(MenuPosition position) async {
+    menuPosition = position;
+  }
+
+  @override
+  Future<void> updateMailViewButtonPosition(MenuPosition position) async {
+    mailViewButtonPosition = position;
+  }
+
+  @override
+  Future<void> updateAfterMailViewAction(AfterMailViewAction action) async {
+    afterMailViewAction = action;
+  }
+}
+
 class FakeSearchHistoryRepository implements SearchHistoryRepository {
   final List<String> _history = [];
 

test/widget/thread_detail_screen_test.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import 'package:sharedinbox/core/models/email.dart';
+import 'package:sharedinbox/core/models/user_preferences.dart';
 import 'package:sharedinbox/di.dart';
 
 import 'helpers.dart';
@@ -142,6 +143,60 @@ void main() {
       expect(find.byIcon(Icons.expand_more), findsOneWidget);
     });
 
+    testWidgets('shows bottom app bar with back button by default', (
+      tester,
+    ) async {
+      final email = _threadEmail();
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/acc-1/mailboxes/INBOX/threads/thread-1',
+          overrides: [
+            accountRepositoryProvider.overrideWithValue(
+              FakeAccountRepository([kTestAccount]),
+            ),
+            mailboxRepositoryProvider.overrideWithValue(
+              FakeMailboxRepository(),
+            ),
+            emailRepositoryProvider.overrideWithValue(
+              FakeEmailRepository(emails: [email]),
+            ),
+          ],
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      expect(find.byType(BottomAppBar), findsOneWidget);
+      expect(find.byIcon(Icons.arrow_back), findsOneWidget);
+    });
+
+    testWidgets('hides bottom app bar when button position is top', (
+      tester,
+    ) async {
+      final email = _threadEmail();
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/acc-1/mailboxes/INBOX/threads/thread-1',
+          userPreferences: FakeUserPreferencesRepository(
+            mailViewButtonPosition: MenuPosition.top,
+          ),
+          overrides: [
+            accountRepositoryProvider.overrideWithValue(
+              FakeAccountRepository([kTestAccount]),
+            ),
+            mailboxRepositoryProvider.overrideWithValue(
+              FakeMailboxRepository(),
+            ),
+            emailRepositoryProvider.overrideWithValue(
+              FakeEmailRepository(emails: [email]),
+            ),
+          ],
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      expect(find.byType(BottomAppBar), findsNothing);
+    });
+
     testWidgets('flagged email shows star icon', (tester) async {
       final email = _threadEmail(isFlagged: true);
       await tester.pumpWidget(

test/widget/user_preferences_screen_test.dart

@@ -0,0 +1,186 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:sharedinbox/core/models/user_preferences.dart';
+import 'package:sharedinbox/di.dart';
+import 'package:sharedinbox/ui/screens/user_preferences_screen.dart';
+
+import 'helpers.dart';
+
+void main() {
+  group('UserPreferencesScreen', () {
+    testWidgets('shows both menu position options', (tester) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      expect(find.text('Menu bar position'), findsOneWidget);
+      expect(find.text('Bottom (default)'), findsNWidgets(2));
+      expect(find.text('Top'), findsNWidgets(2));
+    });
+
+    testWidgets('shows single mail view button position section', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      expect(
+        find.text('Single mail view button position'),
+        findsOneWidget,
+      );
+    });
+
+    testWidgets('menu position bottom option is selected by default', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      final radioGroups = find.byType(RadioGroup<MenuPosition>);
+      final menuGroup =
+          tester.widget<RadioGroup<MenuPosition>>(radioGroups.first);
+      expect(menuGroup.groupValue, MenuPosition.bottom);
+    });
+
+    testWidgets('mail view button position bottom is selected by default', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      final radioGroups = find.byType(RadioGroup<MenuPosition>);
+      final mailViewGroup =
+          tester.widget<RadioGroup<MenuPosition>>(radioGroups.last);
+      expect(mailViewGroup.groupValue, MenuPosition.bottom);
+    });
+
+    testWidgets('tapping Top in menu position section updates the repo', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.text('Top').first);
+      await tester.pumpAndSettle();
+
+      final repo = ProviderScope.containerOf(
+        tester.element(find.byType(UserPreferencesScreen)),
+      ).read(userPreferencesRepositoryProvider)
+          as FakeUserPreferencesRepository;
+
+      expect(repo.menuPosition, MenuPosition.top);
+    });
+
+    testWidgets(
+        'tapping Top in mail view button position section updates the repo', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.text('Top').last);
+      await tester.pumpAndSettle();
+
+      final repo = ProviderScope.containerOf(
+        tester.element(find.byType(UserPreferencesScreen)),
+      ).read(userPreferencesRepositoryProvider)
+          as FakeUserPreferencesRepository;
+
+      expect(repo.mailViewButtonPosition, MenuPosition.top);
+    });
+
+    testWidgets('shows after mail action section', (tester) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      // Scroll down to reveal the new section below the fold.
+      await tester.drag(find.byType(ListView), const Offset(0, -500));
+      await tester.pumpAndSettle();
+
+      expect(find.text('After mail action'), findsOneWidget);
+      expect(find.text('Next message (default)'), findsOneWidget);
+      expect(find.text('Return to mailbox'), findsOneWidget);
+    });
+
+    testWidgets('after mail action next message is selected by default', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.drag(find.byType(ListView), const Offset(0, -500));
+      await tester.pumpAndSettle();
+
+      final radioGroups = find.byType(RadioGroup<AfterMailViewAction>);
+      final group =
+          tester.widget<RadioGroup<AfterMailViewAction>>(radioGroups.first);
+      expect(group.groupValue, AfterMailViewAction.nextMessage);
+    });
+
+    testWidgets('tapping Return to mailbox updates the repo', (
+      tester,
+    ) async {
+      await tester.pumpWidget(
+        buildApp(
+          initialLocation: '/accounts/preferences',
+          overrides: baseOverrides(),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.drag(find.byType(ListView), const Offset(0, -500));
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.text('Return to mailbox'));
+      await tester.pumpAndSettle();
+
+      final repo = ProviderScope.containerOf(
+        tester.element(find.byType(UserPreferencesScreen)),
+      ).read(userPreferencesRepositoryProvider)
+          as FakeUserPreferencesRepository;
+
+      expect(repo.afterMailViewAction, AfterMailViewAction.showMailbox);
+    });
+  });
+}