fix: alot

android/app/src/main/AndroidManifest.xml

@@ -7,6 +7,7 @@
     <application
         android:label="KoolTap"
         android:name="${applicationName}"
+        android:allowBackup="false"
         android:icon="@mipmap/launcher_icon">
         <provider
             android:name="androidx.core.content.FileProvider"

lib/app/app_bootstrap.dart

@@ -8,6 +8,7 @@ import '../database/app_database.dart';
 import '../services/bar_tab_service.dart';
 import '../services/default_product_seeder.dart';
 import '../services/export_service.dart';
+import '../services/remote_sync_service.dart';
 import '../viewmodels/bar_screen_view_model.dart';
 import '../viewmodels/product_list_view_model.dart';
 
@@ -38,9 +39,11 @@ class _AppBootstrapState extends State<AppBootstrap> {
       context.read<ProductListViewModel>().ensureLoaded();
       context.read<BarScreenViewModel>().ensureLoaded();
 
+      final syncService = context.read<RemoteSyncService>();
       unawaited(
         DefaultExportService(
           barTabService: context.read<BarTabService>(),
+          authToken: () => syncService.authToken,
         ).uploadToServer(),
       );
 

lib/app/app_lifecycle_lock.dart

@@ -1,28 +1,44 @@
 import 'package:flutter/material.dart';
 
+/// Locks once the app returns after being in the background for at least
+/// [gracePeriod], so a quick trip to the image picker or installer doesn't.
 class AppLifecycleLockObserver extends WidgetsBindingObserver {
   final VoidCallback onLock;
   final VoidCallback? onBackground;
   final VoidCallback? onForeground;
   final bool Function()? shouldLock;
+  final Duration gracePeriod;
+  final DateTime Function() _clock;
+
+  DateTime? _backgroundedAt;
 
   AppLifecycleLockObserver({
     required this.onLock,
     this.onBackground,
     this.onForeground,
     this.shouldLock,
-  });
+    this.gracePeriod = const Duration(seconds: 30),
+    DateTime Function()? clock,
+  }) : _clock = clock ?? DateTime.now;
 
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     switch (state) {
       case AppLifecycleState.inactive:
+        break;
       case AppLifecycleState.hidden:
       case AppLifecycleState.paused:
       case AppLifecycleState.detached:
-        if (shouldLock?.call() ?? true) onLock();
+        if (_backgroundedAt != null) return;
+        _backgroundedAt = _clock();
         onBackground?.call();
       case AppLifecycleState.resumed:
+        final backgroundedAt = _backgroundedAt;
+        if (backgroundedAt == null) return;
+        _backgroundedAt = null;
+
+        final away = _clock().difference(backgroundedAt);
+        if (away >= gracePeriod && (shouldLock?.call() ?? true)) onLock();
         onForeground?.call();
     }
   }

lib/app/router.dart

@@ -12,7 +12,6 @@ import '../views/bar/bar_screen_view.dart';
 import '../views/dev_menu_view.dart';
 import '../views/error_screen_view.dart';
 import '../views/history_screen_view.dart';
-import '../views/import_names_view.dart';
 import '../views/pin_lock_view.dart';
 import '../views/product_form_view.dart';
 import '../views/product_list_view.dart';
@@ -35,24 +34,18 @@ String? _redirectApp({
   }
 
   final location = state.uri.path;
-  final isConfigured = remoteSyncViewModel.isConfigured;
+  final returnTo = _returnLocation(state);
 
-  if (!isConfigured && location != '/register') {
-    return '/register';
+  if (remoteSyncViewModel.isConfigured && location == '/register') {
+    return '/admin';
   }
 
-  if (isConfigured && location == '/register') {
-    return '/bar';
-  }
-
-  if (!isConfigured) return null;
-
   final goingToLock = location == '/lock';
   final goingToAdminLock = location == '/admin/lock';
   final mustBeOnLock = _mustBeOnLock(pinLockViewModel);
 
-  if (mustBeOnLock && !goingToLock) return '/lock';
-  if (!mustBeOnLock && goingToLock) return '/bar';
+  if (mustBeOnLock && !goingToLock) return _lockLocation('/lock', state);
+  if (!mustBeOnLock && goingToLock) return returnTo ?? '/bar';
 
   final isAdminArea = _isAdminArea(location);
   final isDebugShortcutArea = _isDebugShortcutArea(location);
@@ -61,14 +54,34 @@ String? _redirectApp({
       !isDebugShortcutArea &&
       !goingToAdminLock &&
       !adminPinViewModel.isUnlocked) {
-    return '/admin/lock';
+    return _lockLocation('/admin/lock', state);
   }
 
-  if (goingToAdminLock && adminPinViewModel.isUnlocked) return '/admin';
+  if (goingToAdminLock && adminPinViewModel.isUnlocked) {
+    return returnTo ?? '/admin';
+  }
 
   return null;
 }
 
+/// Sends the user back where they were headed once the PIN is entered.
+String _lockLocation(String lockPath, GoRouterState state) {
+  return Uri(
+    path: lockPath,
+    queryParameters: {'from': state.uri.toString()},
+  ).toString();
+}
+
+String? _returnLocation(GoRouterState state) {
+  final from = state.uri.queryParameters['from'];
+  if (from == null || !from.startsWith('/')) return null;
+
+  final path = Uri.parse(from).path;
+  if (path == '/lock' || path == '/admin/lock') return null;
+
+  return from;
+}
+
 bool _mustBeOnLock(PinLockViewModel pinLockViewModel) {
   final needsPinSetup =
       !pinLockViewModel.isPinSet && pinLockViewModel.pinRequired;
@@ -83,6 +96,9 @@ bool _mustBeOnLock(PinLockViewModel pinLockViewModel) {
 bool _isAdminArea(String location) {
   return location == '/admin' ||
       location.startsWith('/admin/') ||
+      location == '/settings' ||
+      location == '/dev' ||
+      location == '/register' ||
       location == '/products' ||
       location.startsWith('/products/') ||
       location == '/history' ||
@@ -135,9 +151,7 @@ GoRouter createAppRouter({
           mode: pinLockViewModel.isPinSet
               ? PinEntryMode.unlock
               : PinEntryMode.create,
-          onSuccess: () {
-            context.go('/bar');
-          },
+          onSuccess: () => context.go(_returnLocation(state) ?? '/bar'),
         ),
       ),
 
@@ -153,19 +167,13 @@ GoRouter createAppRouter({
           onVerify: adminPinViewModel.verify,
           onSet: adminPinViewModel.setPin,
           error: () => adminPinViewModel.error,
-          onSuccess: () => context.go('/admin'),
+          onSuccess: () => context.go(_returnLocation(state) ?? '/admin'),
         ),
       ),
 
       GoRoute(
         path: '/admin',
         builder: (context, state) => const AdminScreenView(),
-        routes: [
-          GoRoute(
-            path: 'import',
-            builder: (context, state) => const ImportNamesView(),
-          ),
-        ],
       ),
 
       GoRoute(

lib/l10n/app_en.arb

@@ -282,5 +282,37 @@
   "@lastSync": {"placeholders": {"time": {"type": "String"}}},
   "notSyncedYet": "Not synced yet",
   "tabClosedRemotely": "Tab {customer} closed remotely by {requester}",
-  "@tabClosedRemotely": {"placeholders": {"customer": {"type": "String"}, "requester": {"type": "String"}}}
+  "@tabClosedRemotely": {"placeholders": {"customer": {"type": "String"}, "requester": {"type": "String"}}},
+  "actionCannotBeUndone": "This cannot be undone.",
+  "disconnectFromServer": "Disconnect from server",
+  "disconnectFromServerDescription": "This unlinks the device from the remote server. The bar keeps working, but open tabs will no longer be synced. Continue?",
+  "disconnect": "Disconnect",
+  "remoteServer": "Remote server",
+  "connected": "Connected",
+  "deviceLinked": "Device linked to remote server",
+  "notConnected": "Not connected",
+  "linkToDashboard": "Link to remote dashboard",
+  "deviceAccessRevoked": "The server no longer accepts this device. Link it again in Admin.",
+  "duplicateTabName": "Name already in use",
+  "duplicateTabNameDescription": "A tab named {name} is already open. Use this name anyway?",
+  "@duplicateTabNameDescription": {"placeholders": {"name": {"type": "String"}}},
+  "deleteTabWithItemsDescription": "This tab still has drinks on it. Deleting it returns them to stock and leaves nothing in history. Enter the admin PIN to continue.",
+  "connectingToServer": "Connecting to server…",
+  "failedToConnect": "Failed to connect",
+  "unknownError": "Unknown error",
+  "connectToRemoteServer": "Connect to remote server",
+  "selectVenueToLink": "Select your venue to link this device",
+  "selectVenue": "Select venue",
+  "refreshVenues": "Refresh venues",
+  "enterDeviceDetails": "Enter device details to complete pairing",
+  "deviceName": "Device name",
+  "deviceNameRequired": "Device name is required",
+  "registrationCode": "Registration code",
+  "enterRegistrationCode": "Enter the 6-character code",
+  "back": "Back",
+  "register": "Register",
+  "registeringDevice": "Registering device…",
+  "deviceRegistered": "Device registered!",
+  "openTabsWillSync": "Open tabs will sync to the dashboard.",
+  "done": "Done"
 }

lib/l10n/app_localizations.dart

@@ -1669,6 +1669,192 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Tab {customer} closed remotely by {requester}'**
   String tabClosedRemotely(String customer, String requester);
+
+  /// No description provided for @actionCannotBeUndone.
+  ///
+  /// In en, this message translates to:
+  /// **'This cannot be undone.'**
+  String get actionCannotBeUndone;
+
+  /// No description provided for @disconnectFromServer.
+  ///
+  /// In en, this message translates to:
+  /// **'Disconnect from server'**
+  String get disconnectFromServer;
+
+  /// No description provided for @disconnectFromServerDescription.
+  ///
+  /// In en, this message translates to:
+  /// **'This unlinks the device from the remote server. The bar keeps working, but open tabs will no longer be synced. Continue?'**
+  String get disconnectFromServerDescription;
+
+  /// No description provided for @disconnect.
+  ///
+  /// In en, this message translates to:
+  /// **'Disconnect'**
+  String get disconnect;
+
+  /// No description provided for @remoteServer.
+  ///
+  /// In en, this message translates to:
+  /// **'Remote server'**
+  String get remoteServer;
+
+  /// No description provided for @connected.
+  ///
+  /// In en, this message translates to:
+  /// **'Connected'**
+  String get connected;
+
+  /// No description provided for @deviceLinked.
+  ///
+  /// In en, this message translates to:
+  /// **'Device linked to remote server'**
+  String get deviceLinked;
+
+  /// No description provided for @notConnected.
+  ///
+  /// In en, this message translates to:
+  /// **'Not connected'**
+  String get notConnected;
+
+  /// No description provided for @linkToDashboard.
+  ///
+  /// In en, this message translates to:
+  /// **'Link to remote dashboard'**
+  String get linkToDashboard;
+
+  /// No description provided for @deviceAccessRevoked.
+  ///
+  /// In en, this message translates to:
+  /// **'The server no longer accepts this device. Link it again in Admin.'**
+  String get deviceAccessRevoked;
+
+  /// No description provided for @duplicateTabName.
+  ///
+  /// In en, this message translates to:
+  /// **'Name already in use'**
+  String get duplicateTabName;
+
+  /// No description provided for @duplicateTabNameDescription.
+  ///
+  /// In en, this message translates to:
+  /// **'A tab named {name} is already open. Use this name anyway?'**
+  String duplicateTabNameDescription(String name);
+
+  /// No description provided for @deleteTabWithItemsDescription.
+  ///
+  /// In en, this message translates to:
+  /// **'This tab still has drinks on it. Deleting it returns them to stock and leaves nothing in history. Enter the admin PIN to continue.'**
+  String get deleteTabWithItemsDescription;
+
+  /// No description provided for @connectingToServer.
+  ///
+  /// In en, this message translates to:
+  /// **'Connecting to server…'**
+  String get connectingToServer;
+
+  /// No description provided for @failedToConnect.
+  ///
+  /// In en, this message translates to:
+  /// **'Failed to connect'**
+  String get failedToConnect;
+
+  /// No description provided for @unknownError.
+  ///
+  /// In en, this message translates to:
+  /// **'Unknown error'**
+  String get unknownError;
+
+  /// No description provided for @connectToRemoteServer.
+  ///
+  /// In en, this message translates to:
+  /// **'Connect to remote server'**
+  String get connectToRemoteServer;
+
+  /// No description provided for @selectVenueToLink.
+  ///
+  /// In en, this message translates to:
+  /// **'Select your venue to link this device'**
+  String get selectVenueToLink;
+
+  /// No description provided for @selectVenue.
+  ///
+  /// In en, this message translates to:
+  /// **'Select venue'**
+  String get selectVenue;
+
+  /// No description provided for @refreshVenues.
+  ///
+  /// In en, this message translates to:
+  /// **'Refresh venues'**
+  String get refreshVenues;
+
+  /// No description provided for @enterDeviceDetails.
+  ///
+  /// In en, this message translates to:
+  /// **'Enter device details to complete pairing'**
+  String get enterDeviceDetails;
+
+  /// No description provided for @deviceName.
+  ///
+  /// In en, this message translates to:
+  /// **'Device name'**
+  String get deviceName;
+
+  /// No description provided for @deviceNameRequired.
+  ///
+  /// In en, this message translates to:
+  /// **'Device name is required'**
+  String get deviceNameRequired;
+
+  /// No description provided for @registrationCode.
+  ///
+  /// In en, this message translates to:
+  /// **'Registration code'**
+  String get registrationCode;
+
+  /// No description provided for @enterRegistrationCode.
+  ///
+  /// In en, this message translates to:
+  /// **'Enter the 6-character code'**
+  String get enterRegistrationCode;
+
+  /// No description provided for @back.
+  ///
+  /// In en, this message translates to:
+  /// **'Back'**
+  String get back;
+
+  /// No description provided for @register.
+  ///
+  /// In en, this message translates to:
+  /// **'Register'**
+  String get register;
+
+  /// No description provided for @registeringDevice.
+  ///
+  /// In en, this message translates to:
+  /// **'Registering device…'**
+  String get registeringDevice;
+
+  /// No description provided for @deviceRegistered.
+  ///
+  /// In en, this message translates to:
+  /// **'Device registered!'**
+  String get deviceRegistered;
+
+  /// No description provided for @openTabsWillSync.
+  ///
+  /// In en, this message translates to:
+  /// **'Open tabs will sync to the dashboard.'**
+  String get openTabsWillSync;
+
+  /// No description provided for @done.
+  ///
+  /// In en, this message translates to:
+  /// **'Done'**
+  String get done;
 }
 
 class _AppLocalizationsDelegate

lib/l10n/app_localizations_en.dart

@@ -864,4 +864,102 @@ class AppLocalizationsEn extends AppLocalizations {
   String tabClosedRemotely(String customer, String requester) {
     return 'Tab $customer closed remotely by $requester';
   }
+
+  @override
+  String get actionCannotBeUndone => 'This cannot be undone.';
+
+  @override
+  String get disconnectFromServer => 'Disconnect from server';
+
+  @override
+  String get disconnectFromServerDescription =>
+      'This unlinks the device from the remote server. The bar keeps working, but open tabs will no longer be synced. Continue?';
+
+  @override
+  String get disconnect => 'Disconnect';
+
+  @override
+  String get remoteServer => 'Remote server';
+
+  @override
+  String get connected => 'Connected';
+
+  @override
+  String get deviceLinked => 'Device linked to remote server';
+
+  @override
+  String get notConnected => 'Not connected';
+
+  @override
+  String get linkToDashboard => 'Link to remote dashboard';
+
+  @override
+  String get deviceAccessRevoked =>
+      'The server no longer accepts this device. Link it again in Admin.';
+
+  @override
+  String get duplicateTabName => 'Name already in use';
+
+  @override
+  String duplicateTabNameDescription(String name) {
+    return 'A tab named $name is already open. Use this name anyway?';
+  }
+
+  @override
+  String get deleteTabWithItemsDescription =>
+      'This tab still has drinks on it. Deleting it returns them to stock and leaves nothing in history. Enter the admin PIN to continue.';
+
+  @override
+  String get connectingToServer => 'Connecting to server…';
+
+  @override
+  String get failedToConnect => 'Failed to connect';
+
+  @override
+  String get unknownError => 'Unknown error';
+
+  @override
+  String get connectToRemoteServer => 'Connect to remote server';
+
+  @override
+  String get selectVenueToLink => 'Select your venue to link this device';
+
+  @override
+  String get selectVenue => 'Select venue';
+
+  @override
+  String get refreshVenues => 'Refresh venues';
+
+  @override
+  String get enterDeviceDetails => 'Enter device details to complete pairing';
+
+  @override
+  String get deviceName => 'Device name';
+
+  @override
+  String get deviceNameRequired => 'Device name is required';
+
+  @override
+  String get registrationCode => 'Registration code';
+
+  @override
+  String get enterRegistrationCode => 'Enter the 6-character code';
+
+  @override
+  String get back => 'Back';
+
+  @override
+  String get register => 'Register';
+
+  @override
+  String get registeringDevice => 'Registering device…';
+
+  @override
+  String get deviceRegistered => 'Device registered!';
+
+  @override
+  String get openTabsWillSync => 'Open tabs will sync to the dashboard.';
+
+  @override
+  String get done => 'Done';
 }

lib/l10n/app_localizations_nl.dart

@@ -876,4 +876,103 @@ class AppLocalizationsNl extends AppLocalizations {
   String tabClosedRemotely(String customer, String requester) {
     return 'Poef $customer extern gesloten door $requester';
   }
+
+  @override
+  String get actionCannotBeUndone => 'Dit kan niet ongedaan gemaakt worden.';
+
+  @override
+  String get disconnectFromServer => 'Loskoppelen van server';
+
+  @override
+  String get disconnectFromServerDescription =>
+      'Dit koppelt het toestel los van de server. De bar blijft werken, maar open poefs worden niet meer gesynchroniseerd. Doorgaan?';
+
+  @override
+  String get disconnect => 'Loskoppelen';
+
+  @override
+  String get remoteServer => 'Server';
+
+  @override
+  String get connected => 'Verbonden';
+
+  @override
+  String get deviceLinked => 'Toestel gekoppeld aan de server';
+
+  @override
+  String get notConnected => 'Niet verbonden';
+
+  @override
+  String get linkToDashboard => 'Koppelen aan het dashboard';
+
+  @override
+  String get deviceAccessRevoked =>
+      'De server aanvaardt dit toestel niet meer. Koppel het opnieuw via Beheer.';
+
+  @override
+  String get duplicateTabName => 'Naam al in gebruik';
+
+  @override
+  String duplicateTabNameDescription(String name) {
+    return 'Er is al een poef open met de naam $name. Toch deze naam gebruiken?';
+  }
+
+  @override
+  String get deleteTabWithItemsDescription =>
+      'Op deze poef staan nog drankjes. Verwijderen zet ze terug in de voorraad en laat niets na in de geschiedenis. Geef de beheer-PIN in om door te gaan.';
+
+  @override
+  String get connectingToServer => 'Verbinden met server…';
+
+  @override
+  String get failedToConnect => 'Verbinden mislukt';
+
+  @override
+  String get unknownError => 'Onbekende fout';
+
+  @override
+  String get connectToRemoteServer => 'Verbinden met server';
+
+  @override
+  String get selectVenueToLink => 'Kies je locatie om dit toestel te koppelen';
+
+  @override
+  String get selectVenue => 'Kies locatie';
+
+  @override
+  String get refreshVenues => 'Locaties vernieuwen';
+
+  @override
+  String get enterDeviceDetails => 'Vul de toestelgegevens in om te koppelen';
+
+  @override
+  String get deviceName => 'Toestelnaam';
+
+  @override
+  String get deviceNameRequired => 'Toestelnaam is verplicht';
+
+  @override
+  String get registrationCode => 'Registratiecode';
+
+  @override
+  String get enterRegistrationCode => 'Geef de code van 6 tekens in';
+
+  @override
+  String get back => 'Terug';
+
+  @override
+  String get register => 'Registreren';
+
+  @override
+  String get registeringDevice => 'Toestel registreren…';
+
+  @override
+  String get deviceRegistered => 'Toestel geregistreerd!';
+
+  @override
+  String get openTabsWillSync =>
+      'Open poefs worden gesynchroniseerd met het dashboard.';
+
+  @override
+  String get done => 'Klaar';
 }

lib/l10n/app_nl.arb

@@ -282,5 +282,36 @@
   "@lastSync": {"placeholders": {"time": {"type": "String"}}},
   "notSyncedYet": "Nog niet gesynchroniseerd",
   "tabClosedRemotely": "Poef {customer} extern gesloten door {requester}",
-  "@tabClosedRemotely": {"placeholders": {"customer": {"type": "String"}, "requester": {"type": "String"}}}
+  "@tabClosedRemotely": {"placeholders": {"customer": {"type": "String"}, "requester": {"type": "String"}}},
+  "actionCannotBeUndone": "Dit kan niet ongedaan gemaakt worden.",
+  "disconnectFromServer": "Loskoppelen van server",
+  "disconnectFromServerDescription": "Dit koppelt het toestel los van de server. De bar blijft werken, maar open poefs worden niet meer gesynchroniseerd. Doorgaan?",
+  "disconnect": "Loskoppelen",
+  "remoteServer": "Server",
+  "connected": "Verbonden",
+  "deviceLinked": "Toestel gekoppeld aan de server",
+  "notConnected": "Niet verbonden",
+  "linkToDashboard": "Koppelen aan het dashboard",
+  "deviceAccessRevoked": "De server aanvaardt dit toestel niet meer. Koppel het opnieuw via Beheer.",
+  "duplicateTabName": "Naam al in gebruik",
+  "duplicateTabNameDescription": "Er is al een poef open met de naam {name}. Toch deze naam gebruiken?",
+  "deleteTabWithItemsDescription": "Op deze poef staan nog drankjes. Verwijderen zet ze terug in de voorraad en laat niets na in de geschiedenis. Geef de beheer-PIN in om door te gaan.",
+  "connectingToServer": "Verbinden met server…",
+  "failedToConnect": "Verbinden mislukt",
+  "unknownError": "Onbekende fout",
+  "connectToRemoteServer": "Verbinden met server",
+  "selectVenueToLink": "Kies je locatie om dit toestel te koppelen",
+  "selectVenue": "Kies locatie",
+  "refreshVenues": "Locaties vernieuwen",
+  "enterDeviceDetails": "Vul de toestelgegevens in om te koppelen",
+  "deviceName": "Toestelnaam",
+  "deviceNameRequired": "Toestelnaam is verplicht",
+  "registrationCode": "Registratiecode",
+  "enterRegistrationCode": "Geef de code van 6 tekens in",
+  "back": "Terug",
+  "register": "Registreren",
+  "registeringDevice": "Toestel registreren…",
+  "deviceRegistered": "Toestel geregistreerd!",
+  "openTabsWillSync": "Open poefs worden gesynchroniseerd met het dashboard.",
+  "done": "Klaar"
 }

lib/main.dart

@@ -63,7 +63,7 @@ Future<void> _runApp() async {
   final productService = DriftProductService(database: database);
   final barTabService = DriftBarTabService(database: database);
   final settingsService = DriftSettingsService(database: database);
-  final pinLockService = PinLockService();
+  final pinLockService = PinLockService(maxLockout: const Duration(minutes: 1));
   final apiClient = KoolTapApiClient();
 
   final remoteSyncService = RemoteSyncService(

lib/services/export_service.dart

@@ -19,22 +19,34 @@ abstract class ExportService {
 /// failed backup is logged but never interrupts the bar.
 class DefaultExportService implements ExportService {
   final BarTabService barTabService;
+  final Future<String?> Function()? authToken;
   final http.Client _client;
 
-  DefaultExportService({required this.barTabService, http.Client? client})
-    : _client = client ?? http.Client();
+  DefaultExportService({
+    required this.barTabService,
+    this.authToken,
+    http.Client? client,
+  }) : _client = client ?? http.Client();
+
+  static const _timeout = Duration(seconds: 30);
 
   @override
   Future<void> uploadToServer() async {
     try {
       final closedTabs = await barTabService.getClosedTabs();
       final appVersion = (await PackageInfo.fromPlatform()).version;
+      final token = await authToken?.call();
 
-      final response = await _client.post(
-        Uri.parse(kExportServerUrl),
-        headers: {'Content-Type': 'application/json'},
-        body: jsonEncode(_buildPayload(closedTabs, appVersion: appVersion)),
-      );
+      final response = await _client
+          .post(
+            Uri.parse(kExportServerUrl),
+            headers: {
+              'Content-Type': 'application/json',
+              if (token != null) 'Authorization': 'Bearer $token',
+            },
+            body: jsonEncode(_buildPayload(closedTabs, appVersion: appVersion)),
+          )
+          .timeout(_timeout);
 
       if (response.statusCode != 200 && response.statusCode != 201) {
         unawaited(

lib/services/pin_lock_service.dart

@@ -20,6 +20,7 @@ class PinLockService {
     this._saltKey = _defaultSaltKey,
     this._hashKey = _defaultHashKey,
     DateTime Function()? clock,
+    this.maxLockout = const Duration(minutes: 15),
   }) : _storage = storage ?? const FlutterSecureStorage(),
        _clock = clock ?? DateTime.now;
 
@@ -31,13 +32,15 @@ class PinLockService {
 
   static const _freeAttempts = 5;
   static const _baseLockout = Duration(seconds: 30);
-  static const _maxLockout = Duration(minutes: 15);
 
   final FlutterSecureStorage _storage;
   final String _saltKey;
   final String _hashKey;
   final DateTime Function() _clock;
 
+  /// Kept short for the bar PIN so a bartender is never locked out for long.
+  final Duration maxLockout;
+
   String get _failuresKey => '${_hashKey}_failures';
   String get _lockedUntilKey => '${_hashKey}_locked_until';
 
@@ -113,7 +116,7 @@ class PinLockService {
 
     final exponent = min(failures - _freeAttempts, 10);
     final lockout = _baseLockout * (1 << exponent);
-    final capped = lockout > _maxLockout ? _maxLockout : lockout;
+    final capped = lockout > maxLockout ? maxLockout : lockout;
 
     await _storage.write(
       key: _lockedUntilKey,

lib/services/product_service.dart

@@ -130,12 +130,13 @@ class DriftProductService implements ProductService {
     );
   }
 
+  /// Only hidden, since open tabs and history still refer to it.
   @override
   Future<void> deleteProduct(String id) async {
-    final query = database.delete(database.products)
+    final query = database.update(database.products)
       ..where((product) => product.id.equals(id));
 
-    await query.go();
+    await query.write(const ProductsCompanion(active: Value(false)));
   }
 
   @override

lib/services/remote_sync_service.dart

@@ -1,8 +1,10 @@
 import 'dart:async';
+import 'dart:io';
 
 import 'package:drift/drift.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import 'package:http/http.dart' as http;
 import 'package:sentry_flutter/sentry_flutter.dart';
 
 import '../database/app_database.dart';
@@ -65,20 +67,29 @@ class RemoteSyncService {
   DateTime? _firstPendingChange;
   bool _syncQueued = false;
 
+  _Credentials? _cachedCredentials;
+
   Future<String?> get venueId => secureStorage.read(key: _venueIdKey);
 
-  Future<bool> get isConfigured async {
-    final token = await secureStorage.read(key: _authTokenKey);
-    final venueId = await this.venueId;
-    return (token?.isNotEmpty ?? false) && (venueId?.isNotEmpty ?? false);
-  }
+  Future<bool> get isConfigured async => await _credentials() != null;
+
+  Future<String?> get authToken async => (await _credentials())?.token;
 
   Future<_Credentials?> _credentials() async {
+    if (_cachedCredentials != null) return _cachedCredentials;
+
     final deviceId = await secureStorage.read(key: _deviceIdKey);
     final token = await secureStorage.read(key: _authTokenKey);
-    if (deviceId == null || token == null) return null;
+    final venueId = await this.venueId;
+    if (deviceId == null ||
+        token == null ||
+        token.isEmpty ||
+        venueId == null ||
+        venueId.isEmpty) {
+      return null;
+    }
 
-    return (deviceId: deviceId, token: token);
+    return _cachedCredentials = (deviceId: deviceId, token: token);
   }
 
   void startPeriodicSync() {
@@ -109,8 +120,6 @@ class RemoteSyncService {
 
   void resume() {
     _paused = false;
-    // Catch up right away instead of waiting for the next poll
-    _onTabsChanged();
   }
 
   /// Pushes tab changes to the server soon after they happen instead of
@@ -164,7 +173,7 @@ class RemoteSyncService {
     }
 
     final credentials = await _credentials();
-    if (credentials == null || !await isConfigured) return;
+    if (credentials == null) return;
 
     _isSyncing = true;
     Duration nextDelay;
@@ -176,6 +185,7 @@ class RemoteSyncService {
       _emit(RemoteSyncEventType.syncCompleted);
     } on UnauthorizedException {
       debugPrint('RemoteSyncService: token revoked');
+      _cachedCredentials = null;
       await secureStorage.delete(key: _authTokenKey);
       stopPeriodicSync();
       _emit(RemoteSyncEventType.unauthorized);
@@ -183,7 +193,9 @@ class RemoteSyncService {
     } on RateLimitedException catch (e) {
       nextDelay = await _recordFailure(e, retryAfter: e.retryAfter);
     } catch (e, stack) {
-      unawaited(Sentry.captureException(e, stackTrace: stack));
+      if (!_isConnectivityError(e)) {
+        unawaited(Sentry.captureException(e, stackTrace: stack));
+      }
       nextDelay = await _recordFailure(e);
     } finally {
       _isSyncing = false;
@@ -197,6 +209,13 @@ class RemoteSyncService {
     }
   }
 
+  /// Offline tablets are expected, not worth an error report.
+  bool _isConnectivityError(Object error) {
+    return error is IOException ||
+        error is TimeoutException ||
+        error is http.ClientException;
+  }
+
   Future<Duration> _recordFailure(Object error, {Duration? retryAfter}) async {
     debugPrint('RemoteSyncService: sync failed: $error');
     _consecutiveFailures++;
@@ -391,9 +410,11 @@ class RemoteSyncService {
     await secureStorage.write(key: _deviceIdKey, value: deviceId);
     await secureStorage.write(key: _authTokenKey, value: token);
     await secureStorage.write(key: _venueIdKey, value: venueId);
+    _cachedCredentials = (deviceId: deviceId, token: token);
   }
 
   Future<void> clearCredentials() async {
+    _cachedCredentials = null;
     await secureStorage.delete(key: _deviceIdKey);
     await secureStorage.delete(key: _authTokenKey);
     await secureStorage.delete(key: _venueIdKey);

lib/utils/app_update_util.dart

@@ -65,9 +65,7 @@ class AppUpdateUtil {
 
     final url = Uri.parse('$serverUrl/api/update?version=$version');
 
-    final response = await http.get(url);
-
-    debugPrint('Response from update server: ${response.body}');
+    final response = await http.get(url).timeout(const Duration(seconds: 15));
 
     if (response.statusCode != 200) {
       throw Exception('Update server unavailable');

lib/utils/money.dart

@@ -2,6 +2,19 @@ import 'package:intl/intl.dart';
 
 final _euro = NumberFormat.currency(locale: 'nl_BE', symbol: '€');
 
+final _euroInput = RegExp(r'^(\d{1,6})(?:[.,](\d{1,2}))?$');
+
 extension Cents on int {
   String get asEuro => _euro.format(this / 100);
 }
+
+/// Parses a typed price like `2,50` or `3` without going through doubles.
+/// Returns null for anything else, including more than two decimals.
+int? parseEuroToCents(String input) {
+  final match = _euroInput.firstMatch(input.trim());
+  if (match == null) return null;
+
+  final euros = int.parse(match.group(1)!);
+  final cents = int.parse((match.group(2) ?? '0').padRight(2, '0'));
+  return euros * 100 + cents;
+}

lib/viewmodels/bar_screen_view_model.dart

@@ -37,6 +37,15 @@ class BarScreenViewModel extends ChangeNotifier {
   BarTab? get selectedTab =>
       _tabs.firstWhereOrNull((tab) => tab.id == _selectedTabId);
 
+  bool hasOpenTabNamed(String name, {String? exceptTabId}) {
+    final normalized = name.trim().toLowerCase();
+    return _tabs.any(
+      (tab) =>
+          tab.id != exceptTabId &&
+          tab.customerName.trim().toLowerCase() == normalized,
+    );
+  }
+
   void ensureLoaded() {
     if (_subscription != null) return;
 

lib/viewmodels/remote_sync_view_model.dart

@@ -24,6 +24,11 @@ class RemoteSyncViewModel extends ChangeNotifier {
   bool _isConfigured = false;
   bool get isConfigured => _isConfigured;
 
+  bool _wasRevoked = false;
+
+  /// The server rejected this device's token; it needs to be linked again.
+  bool get wasRevoked => _wasRevoked;
+
   DateTime? _lastSyncAt;
   DateTime? get lastSyncAt => _lastSyncAt;
 
@@ -54,6 +59,7 @@ class RemoteSyncViewModel extends ChangeNotifier {
   /// Called once registration stored new credentials.
   Future<void> activate() async {
     await _refreshStatus();
+    if (_isConfigured) _wasRevoked = false;
     notifyListeners();
 
     if (!_isConfigured) return;
@@ -90,6 +96,7 @@ class RemoteSyncViewModel extends ChangeNotifier {
     syncService.stopPeriodicSync();
     await syncService.clearCredentials();
     _isConfigured = false;
+    _wasRevoked = false;
     _venueId = null;
     _lastSyncAt = null;
     _lastError = null;
@@ -105,8 +112,8 @@ class RemoteSyncViewModel extends ChangeNotifier {
       case RemoteSyncEventType.syncFailed:
         _lastError = event.message;
       case RemoteSyncEventType.unauthorized:
-        // The router sends the device back to registration.
         _isConfigured = false;
+        _wasRevoked = true;
       case RemoteSyncEventType.tabClosedRemotely:
       case RemoteSyncEventType.conflict:
         break;

lib/views/admin_screen_view.dart

@@ -33,11 +33,8 @@ class AdminScreenView extends StatelessWidget {
     final confirmed = await showDialog<bool>(
       context: context,
       builder: (ctx) => AlertDialog(
-        title: const Text('Disconnect from server'),
-        content: const Text(
-          'This will unlink the device from the remote server. '
-          'Open tabs will no longer be synced. Continue?',
-        ),
+        title: Text(l10n.disconnectFromServer),
+        content: Text(l10n.disconnectFromServerDescription),
         actions: [
           TextButton(
             onPressed: () => Navigator.pop(ctx, false),
@@ -46,7 +43,7 @@ class AdminScreenView extends StatelessWidget {
           FilledButton(
             onPressed: () => Navigator.pop(ctx, true),
             style: FilledButton.styleFrom(backgroundColor: Colors.red),
-            child: const Text('Disconnect'),
+            child: Text(l10n.disconnect),
           ),
         ],
       ),
@@ -109,35 +106,33 @@ class AdminScreenView extends StatelessWidget {
                   subtitle: l10n.closedTabs,
                   onTap: () => context.push('/history'),
                 ),
-                _AdminTile(
-                  icon: Icons.file_upload_outlined,
-                  title: l10n.importData,
-                  subtitle: l10n.importNamesDescription,
-                  onTap: () => context.push('/admin/import'),
-                ),
               ],
             ),
             const SizedBox(height: 8),
             _AdminSection(
-              title: 'Remote Server',
+              title: l10n.remoteServer,
               children: [
                 if (remoteSync.isConfigured) ...[
                   _AdminTile(
                     icon: Icons.cloud_done_outlined,
-                    title: 'Connected',
-                    subtitle: 'Device linked to remote server',
+                    title: l10n.connected,
+                    subtitle: l10n.deviceLinked,
                     trailing: TextButton(
                       onPressed: () => _confirmUnlink(context),
                       style: TextButton.styleFrom(foregroundColor: Colors.red),
-                      child: const Text('Disconnect'),
+                      child: Text(l10n.disconnect),
                     ),
                     onTap: null,
                   ),
                 ] else
                   _AdminTile(
-                    icon: Icons.cloud_outlined,
-                    title: 'Not connected',
-                    subtitle: 'Link to remote dashboard',
+                    icon: remoteSync.wasRevoked
+                        ? Icons.cloud_off_rounded
+                        : Icons.cloud_outlined,
+                    title: l10n.notConnected,
+                    subtitle: remoteSync.wasRevoked
+                        ? l10n.deviceAccessRevoked
+                        : l10n.linkToDashboard,
                     onTap: () => context.push('/register'),
                   ),
               ],

lib/views/bar/bar_screen_view.dart

@@ -144,6 +144,15 @@ class _BarScreenViewState extends State<BarScreenView> {
               location: '/history',
             ),
           ],
+          if (context.watch<RemoteSyncViewModel>().wasRevoked) ...[
+            const SizedBox(width: 6),
+            IconButton(
+              tooltip: l10n.deviceAccessRevoked,
+              color: Theme.of(context).colorScheme.error,
+              onPressed: () => context.push('/admin'),
+              icon: const Icon(Icons.cloud_off_rounded),
+            ),
+          ],
           const SizedBox(width: 6),
           IconButton(
             tooltip: l10n.refresh,

lib/views/dev_menu_view.dart

@@ -45,6 +45,36 @@ class _DevMenuViewState extends State<DevMenuView> {
     ).showSnackBar(SnackBar(content: Text(l10n.devAction(message))));
   }
 
+  Future<void> _confirmThen(
+    String title,
+    Future<void> Function() action,
+  ) async {
+    final l10n = AppLocalizations.of(context);
+
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (dialogContext) => AlertDialog(
+        title: Text(title),
+        content: Text(l10n.actionCannotBeUndone),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(dialogContext, false),
+            child: Text(l10n.cancel),
+          ),
+          FilledButton(
+            onPressed: () => Navigator.pop(dialogContext, true),
+            style: FilledButton.styleFrom(
+              backgroundColor: Theme.of(dialogContext).colorScheme.error,
+            ),
+            child: Text(l10n.confirm),
+          ),
+        ],
+      ),
+    );
+
+    if (confirmed == true) await action();
+  }
+
   @override
   void dispose() {
     _vm?.removeListener(_onVmChange);
@@ -78,12 +108,19 @@ class _DevMenuViewState extends State<DevMenuView> {
               _Tile(
                 icon: Icons.delete_sweep_rounded,
                 title: l10n.clearOpenTabs,
-                onTap: vm.isLoading ? null : () => vm.clearOpenTabs(),
+                onTap: vm.isLoading
+                    ? null
+                    : () => _confirmThen(l10n.clearOpenTabs, vm.clearOpenTabs),
               ),
               _Tile(
                 icon: Icons.history_rounded,
                 title: l10n.clearClosedHistory,
-                onTap: vm.isLoading ? null : () => vm.clearClosedTabHistory(),
+                onTap: vm.isLoading
+                    ? null
+                    : () => _confirmThen(
+                        l10n.clearClosedHistory,
+                        vm.clearClosedTabHistory,
+                      ),
               ),
               _Tile(
                 icon: Icons.add_box_rounded,
@@ -95,18 +132,33 @@ class _DevMenuViewState extends State<DevMenuView> {
                 icon: Icons.restart_alt_rounded,
                 title: l10n.clearAndReseedProducts,
                 subtitle: l10n.wipesAndReseeds,
-                onTap: vm.isLoading ? null : () => vm.clearAndReseedProducts(),
+                onTap: vm.isLoading
+                    ? null
+                    : () => _confirmThen(
+                        l10n.clearAndReseedProducts,
+                        vm.clearAndReseedProducts,
+                      ),
               ),
               _Tile(
                 icon: Icons.delete_forever_rounded,
                 title: l10n.clearAllProducts,
-                onTap: vm.isLoading ? null : () => vm.clearAllProducts(),
+                onTap: vm.isLoading
+                    ? null
+                    : () => _confirmThen(
+                        l10n.clearAllProducts,
+                        vm.clearAllProducts,
+                      ),
               ),
               _Tile(
                 icon: Icons.image_rounded,
                 title: l10n.clearProductImages,
                 subtitle: l10n.deletesProductImages,
-                onTap: vm.isLoading ? null : () => vm.clearProductImages(),
+                onTap: vm.isLoading
+                    ? null
+                    : () => _confirmThen(
+                        l10n.clearProductImages,
+                        vm.clearProductImages,
+                      ),
               ),
             ],
           ),
@@ -117,7 +169,9 @@ class _DevMenuViewState extends State<DevMenuView> {
                 icon: Icons.lock_reset_rounded,
                 title: l10n.resetPin,
                 subtitle: l10n.removePinLock,
-                onTap: vm.isLoading ? null : () => vm.resetPin(),
+                onTap: vm.isLoading
+                    ? null
+                    : () => _confirmThen(l10n.resetPin, vm.resetPin),
               ),
               _Tile(
                 icon: Icons.bug_report_rounded,

lib/views/dialogs/duplicate_tab_name_dialog.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/material.dart';
+
+import '../../l10n/app_localizations.dart';
+
+Future<bool> confirmDuplicateTabName(BuildContext context, String name) async {
+  final l10n = AppLocalizations.of(context);
+
+  final confirmed = await showDialog<bool>(
+    context: context,
+    builder: (dialogContext) => AlertDialog(
+      title: Text(l10n.duplicateTabName),
+      content: Text(l10n.duplicateTabNameDescription(name)),
+      actions: [
+        TextButton(
+          onPressed: () => Navigator.pop(dialogContext, false),
+          child: Text(l10n.cancel),
+        ),
+        FilledButton(
+          onPressed: () => Navigator.pop(dialogContext, true),
+          child: Text(l10n.confirm),
+        ),
+      ],
+    ),
+  );
+
+  return confirmed == true;
+}

lib/views/dialogs/edit_tab_dialog.dart

@@ -2,8 +2,13 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
 import '../../l10n/app_localizations.dart';
+import '../../l10n/app_localizations_helpers.dart';
+import '../../models/app_error.dart';
 import '../../models/bar_tab.dart';
+import '../../services/pin_lock_service.dart';
+import '../../viewmodels/admin_pin_view_model.dart';
 import '../../viewmodels/bar_screen_view_model.dart';
+import 'duplicate_tab_name_dialog.dart';
 
 Future<void> showEditTabDialog(BuildContext context, BarTab tab) async {
   final l10n = AppLocalizations.of(context);
@@ -13,10 +18,19 @@ Future<void> showEditTabDialog(BuildContext context, BarTab tab) async {
     builder: (_) => _EditTabDialog(initialName: tab.customerName),
   );
 
-  if (name == null || name.trim().isEmpty || !context.mounted) return;
+  final trimmed = name?.trim() ?? '';
+  if (trimmed.isEmpty || trimmed == tab.customerName || !context.mounted) {
+    return;
+  }
+
+  final viewModel = context.read<BarScreenViewModel>();
+  if (viewModel.hasOpenTabNamed(trimmed, exceptTabId: tab.id) &&
+      !await confirmDuplicateTabName(context, trimmed)) {
+    return;
+  }
 
   try {
-    await context.read<BarScreenViewModel>().renameTab(tab.id, name.trim());
+    await viewModel.renameTab(tab.id, trimmed);
   } catch (_) {
     if (!context.mounted) return;
     ScaffoldMessenger.of(
@@ -78,30 +92,37 @@ class _EditTabDialogState extends State<_EditTabDialog> {
   }
 }
 
+/// Deleting a tab with drinks on it leaves no trace in history, so it needs
+/// the admin PIN when one is set.
 Future<void> confirmDeleteTab(BuildContext context, BarTab tab) async {
   final l10n = AppLocalizations.of(context);
+  final adminPinViewModel = context.read<AdminPinViewModel>();
+  final needsAdminPin = tab.items.isNotEmpty && adminPinViewModel.isPinSet;
 
-  final confirmed = await showDialog<bool>(
+  final result = await showDialog<_DeleteTabResult>(
     context: context,
-    builder: (dialogContext) {
-      return AlertDialog(
-        title: Text(l10n.deleteTab),
-        content: Text(l10n.deleteTabDescription),
-        actions: [
-          TextButton(
-            onPressed: () => Navigator.of(dialogContext).pop(false),
-            child: Text(l10n.cancel),
-          ),
-          FilledButton(
-            onPressed: () => Navigator.of(dialogContext).pop(true),
-            child: Text(l10n.delete),
-          ),
-        ],
-      );
-    },
+    builder: (_) => _DeleteTabDialog(
+      description: tab.items.isEmpty
+          ? l10n.deleteTabDescription
+          : l10n.deleteTabWithItemsDescription,
+      needsAdminPin: needsAdminPin,
+    ),
   );
 
-  if (confirmed != true || !context.mounted) return;
+  if (result == null || !context.mounted) return;
+
+  if (needsAdminPin) {
+    final error = await _verifyAdminPin(adminPinViewModel, result.pin);
+    if (error != null) {
+      if (!context.mounted) return;
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text(l10n.errorText(error))));
+      return;
+    }
+  }
+
+  if (!context.mounted) return;
 
   try {
     await context.read<BarScreenViewModel>().deleteTab(tab.id);
@@ -112,3 +133,94 @@ Future<void> confirmDeleteTab(BuildContext context, BarTab tab) async {
     ).showSnackBar(SnackBar(content: Text(l10n.couldNotDeleteTab)));
   }
 }
+
+Future<AppError?> _verifyAdminPin(
+  AdminPinViewModel adminPinViewModel,
+  String pin,
+) async {
+  try {
+    final matches = await adminPinViewModel.adminPinService.verifyPin(pin);
+    return matches ? null : AppError.incorrectPin;
+  } on PinLockedOutException {
+    return AppError.tooManyPinAttempts;
+  } catch (_) {
+    return AppError.verifyPin;
+  }
+}
+
+class _DeleteTabResult {
+  final String pin;
+
+  const _DeleteTabResult(this.pin);
+}
+
+class _DeleteTabDialog extends StatefulWidget {
+  final String description;
+  final bool needsAdminPin;
+
+  const _DeleteTabDialog({
+    required this.description,
+    required this.needsAdminPin,
+  });
+
+  @override
+  State<_DeleteTabDialog> createState() => _DeleteTabDialogState();
+}
+
+class _DeleteTabDialogState extends State<_DeleteTabDialog> {
+  final _pinController = TextEditingController();
+
+  @override
+  void dispose() {
+    _pinController.dispose();
+    super.dispose();
+  }
+
+  void _confirm() {
+    Navigator.of(context).pop(_DeleteTabResult(_pinController.text));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context);
+
+    return AlertDialog(
+      title: Text(l10n.deleteTab),
+      content: SizedBox(
+        width: 360,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(widget.description),
+            if (widget.needsAdminPin) ...[
+              const SizedBox(height: 16),
+              TextField(
+                controller: _pinController,
+                autofocus: true,
+                obscureText: true,
+                keyboardType: TextInputType.number,
+                maxLength: 4,
+                decoration: InputDecoration(labelText: l10n.adminPin),
+                onSubmitted: (_) => _confirm(),
+              ),
+            ],
+          ],
+        ),
+      ),
+      actions: [
+        TextButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: Text(l10n.cancel),
+        ),
+        FilledButton(
+          onPressed: _confirm,
+          style: FilledButton.styleFrom(
+            backgroundColor: Theme.of(context).colorScheme.error,
+          ),
+          child: Text(l10n.delete),
+        ),
+      ],
+    );
+  }
+}

lib/views/dialogs/new_tab_dialog.dart

@@ -3,6 +3,7 @@ import 'package:provider/provider.dart';
 
 import '../../l10n/app_localizations.dart';
 import '../../viewmodels/bar_screen_view_model.dart';
+import 'duplicate_tab_name_dialog.dart';
 
 /// Returns the name of the opened tab, or null when nothing was opened.
 Future<String?> showNewTabDialog(BuildContext context) async {
@@ -42,8 +43,14 @@ Future<String?> showNewTabDialog(BuildContext context) async {
   final trimmed = name?.trim() ?? '';
   if (trimmed.isEmpty || !context.mounted) return null;
 
+  final viewModel = context.read<BarScreenViewModel>();
+  if (viewModel.hasOpenTabNamed(trimmed) &&
+      !await confirmDuplicateTabName(context, trimmed)) {
+    return null;
+  }
+
   try {
-    await context.read<BarScreenViewModel>().createTab(trimmed);
+    await viewModel.createTab(trimmed);
     return trimmed;
   } catch (_) {
     if (context.mounted) {

lib/views/import_names_view.dart

@@ -1,59 +0,0 @@
-import 'package:flutter/material.dart';
-
-import '../l10n/app_localizations.dart';
-import '../utils/navigation.dart';
-
-class ImportNamesView extends StatelessWidget {
-  const ImportNamesView({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    final l10n = AppLocalizations.of(context);
-    final scheme = Theme.of(context).colorScheme;
-
-    return Scaffold(
-      appBar: AppBar(
-        leading: IconButton(
-          onPressed: () => context.popOrGo('/admin'),
-          icon: const Icon(Icons.arrow_back),
-        ),
-        title: Text(l10n.importData),
-      ),
-      body: Center(
-        child: ConstrainedBox(
-          constraints: const BoxConstraints(maxWidth: 560),
-          child: Padding(
-            padding: const EdgeInsets.all(24),
-            child: Card(
-              child: Padding(
-                padding: const EdgeInsets.all(32),
-                child: Column(
-                  mainAxisSize: MainAxisSize.min,
-                  children: [
-                    Icon(
-                      Icons.file_upload_outlined,
-                      size: 48,
-                      color: scheme.primary,
-                    ),
-                    const SizedBox(height: 20),
-                    Text(
-                      l10n.importNames,
-                      style: Theme.of(context).textTheme.titleLarge,
-                      textAlign: TextAlign.center,
-                    ),
-                    const SizedBox(height: 8),
-                    Text(
-                      l10n.importPlaceholder,
-                      style: Theme.of(context).textTheme.bodyMedium,
-                      textAlign: TextAlign.center,
-                    ),
-                  ],
-                ),
-              ),
-            ),
-          ),
-        ),
-      ),
-    );
-  }
-}

lib/views/product_form_view.dart

@@ -9,6 +9,7 @@ import 'package:provider/provider.dart';
 import '../l10n/app_localizations.dart';
 import '../l10n/app_localizations_helpers.dart';
 import '../models/product.dart';
+import '../utils/money.dart';
 import '../utils/navigation.dart';
 import '../viewmodels/product_list_view_model.dart';
 
@@ -148,24 +149,10 @@ class _ProductFormViewState extends State<ProductFormView> {
     });
   }
 
-  int _parsePriceToCents(String value) {
-    final normalized = value.replaceAll(',', '.');
-    final euros = double.tryParse(normalized) ?? 0;
-
-    return (euros * 100).round();
-  }
-
   Future<void> _save() async {
     final l10n = AppLocalizations.of(context);
     if (!_formKey.currentState!.validate()) return;
 
-    if (_imagePath == null || _imagePath!.isEmpty) {
-      ScaffoldMessenger.of(
-        context,
-      ).showSnackBar(SnackBar(content: Text(l10n.chooseImage)));
-      return;
-    }
-
     if (_selectedCategory == null) {
       ScaffoldMessenger.of(
         context,
@@ -179,7 +166,7 @@ class _ProductFormViewState extends State<ProductFormView> {
 
     final name = _nameController.text.trim();
     final category = _selectedCategory!;
-    final priceInCents = _parsePriceToCents(_priceController.text);
+    final priceInCents = parseEuroToCents(_priceController.text)!;
     final stockQuantity = int.tryParse(_stockController.text) ?? 0;
     final lowStockThreshold = int.tryParse(_lowStockController.text) ?? 0;
 
@@ -422,10 +409,7 @@ class _ProductFormViewState extends State<ProductFormView> {
                             return l10n.enterPrice;
                           }
 
-                          final normalized = value.replaceAll(',', '.');
-                          final price = double.tryParse(normalized);
-
-                          if (price == null || price < 0) {
+                          if (parseEuroToCents(value) == null) {
                             return l10n.enterValidPrice;
                           }
 

lib/views/registration_view.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
 import '../l10n/app_localizations.dart';
+import '../utils/navigation.dart';
 import '../viewmodels/registration_view_model.dart';
 import '../viewmodels/remote_sync_view_model.dart';
 
@@ -25,6 +26,8 @@ class _RegistrationViewState extends State<RegistrationView> {
     });
   }
 
+  AppLocalizations get _l10n => AppLocalizations.of(context);
+
   @override
   void dispose() {
     _deviceNameController.dispose();
@@ -39,6 +42,14 @@ class _RegistrationViewState extends State<RegistrationView> {
 
     return Scaffold(
       backgroundColor: Theme.of(context).colorScheme.surface,
+      appBar: AppBar(
+        backgroundColor: Colors.transparent,
+        leading: IconButton(
+          tooltip: l10n.cancel,
+          onPressed: () => context.popOrGo('/admin'),
+          icon: const Icon(Icons.close_rounded),
+        ),
+      ),
       body: SafeArea(
         child: Center(
           child: SingleChildScrollView(
@@ -87,7 +98,7 @@ class _RegistrationViewState extends State<RegistrationView> {
         const CircularProgressIndicator(strokeWidth: 3),
         const SizedBox(height: 16),
         Text(
-          'Connecting to server…',
+          _l10n.connectingToServer,
           style: Theme.of(context).textTheme.titleMedium,
         ),
       ],
@@ -106,12 +117,12 @@ class _RegistrationViewState extends State<RegistrationView> {
         ),
         const SizedBox(height: 24),
         Text(
-          'Failed to connect',
+          _l10n.failedToConnect,
           style: Theme.of(context).textTheme.titleLarge,
         ),
         const SizedBox(height: 12),
         Text(
-          vm.errorMessage ?? 'Unknown error',
+          vm.errorMessage ?? _l10n.unknownError,
           textAlign: TextAlign.center,
           style: Theme.of(context).textTheme.bodyMedium?.copyWith(
             color: Theme.of(
@@ -123,7 +134,7 @@ class _RegistrationViewState extends State<RegistrationView> {
         FilledButton.icon(
           onPressed: () => vm.retry(),
           icon: const Icon(Icons.refresh),
-          label: const Text('Retry'),
+          label: Text(_l10n.retry),
         ),
       ],
     );
@@ -142,13 +153,13 @@ class _RegistrationViewState extends State<RegistrationView> {
         ),
         const SizedBox(height: 16),
         Text(
-          'Connect to remote server',
+          _l10n.connectToRemoteServer,
           textAlign: TextAlign.center,
           style: Theme.of(context).textTheme.headlineSmall,
         ),
         const SizedBox(height: 8),
         Text(
-          'Select your venue to link this device',
+          _l10n.selectVenueToLink,
           textAlign: TextAlign.center,
           style: Theme.of(context).textTheme.bodyMedium?.copyWith(
             color: Theme.of(
@@ -158,7 +169,7 @@ class _RegistrationViewState extends State<RegistrationView> {
         ),
         const SizedBox(height: 32),
         Text(
-          'Select venue',
+          _l10n.selectVenue,
           style: Theme.of(context).textTheme.labelLarge?.copyWith(
             color: Theme.of(
               context,
@@ -217,7 +228,7 @@ class _RegistrationViewState extends State<RegistrationView> {
         const SizedBox(height: 24),
         TextButton(
           onPressed: () => vm.retry(),
-          child: const Text('Refresh venues'),
+          child: Text(_l10n.refreshVenues),
         ),
       ],
     );
@@ -244,7 +255,7 @@ class _RegistrationViewState extends State<RegistrationView> {
           ),
           const SizedBox(height: 8),
           Text(
-            'Enter device details to complete pairing',
+            _l10n.enterDeviceDetails,
             textAlign: TextAlign.center,
             style: Theme.of(context).textTheme.bodyMedium?.copyWith(
               color: Theme.of(
@@ -255,20 +266,19 @@ class _RegistrationViewState extends State<RegistrationView> {
           const SizedBox(height: 32),
           TextFormField(
             controller: _deviceNameController,
-            decoration: const InputDecoration(
-              labelText: 'Device name',
+            decoration: InputDecoration(
+              labelText: _l10n.deviceName,
               hintText: 'e.g. Bar terminal 1',
               border: OutlineInputBorder(),
             ),
-            validator: (v) => v == null || v.trim().isEmpty
-                ? 'Device name is required'
-                : null,
+            validator: (v) =>
+                v == null || v.trim().isEmpty ? _l10n.deviceNameRequired : null,
           ),
           const SizedBox(height: 16),
           TextFormField(
             controller: _regCodeController,
-            decoration: const InputDecoration(
-              labelText: 'Registration code',
+            decoration: InputDecoration(
+              labelText: _l10n.registrationCode,
               hintText: '6-character code from dashboard',
               border: OutlineInputBorder(),
               counterText: '',
@@ -276,7 +286,7 @@ class _RegistrationViewState extends State<RegistrationView> {
             maxLength: 6,
             textCapitalization: TextCapitalization.characters,
             validator: (v) => v == null || v.trim().length < 6
-                ? 'Enter the 6-character code'
+                ? _l10n.enterRegistrationCode
                 : null,
           ),
           const SizedBox(height: 8),
@@ -298,7 +308,7 @@ class _RegistrationViewState extends State<RegistrationView> {
                 onPressed: () {
                   vm.reset();
                 },
-                child: const Text('Back'),
+                child: Text(_l10n.back),
               ),
               const SizedBox(width: 12),
               Expanded(
@@ -312,7 +322,7 @@ class _RegistrationViewState extends State<RegistrationView> {
                           .toUpperCase(),
                     );
                   },
-                  child: const Text('Register'),
+                  child: Text(_l10n.register),
                 ),
               ),
             ],
@@ -330,7 +340,7 @@ class _RegistrationViewState extends State<RegistrationView> {
         const CircularProgressIndicator(strokeWidth: 3),
         const SizedBox(height: 24),
         Text(
-          'Registering device…',
+          _l10n.registeringDevice,
           style: Theme.of(context).textTheme.titleMedium,
         ),
       ],
@@ -349,7 +359,7 @@ class _RegistrationViewState extends State<RegistrationView> {
         ),
         const SizedBox(height: 24),
         Text(
-          'Device registered!',
+          _l10n.deviceRegistered,
           textAlign: TextAlign.center,
           style: Theme.of(context).textTheme.headlineSmall,
         ),
@@ -365,7 +375,7 @@ class _RegistrationViewState extends State<RegistrationView> {
         ),
         const SizedBox(height: 8),
         Text(
-          'Open tabs will sync to the dashboard.',
+          _l10n.openTabsWillSync,
           textAlign: TextAlign.center,
           style: Theme.of(context).textTheme.bodySmall?.copyWith(
             color: Theme.of(
@@ -378,7 +388,7 @@ class _RegistrationViewState extends State<RegistrationView> {
           // Once configured, the router redirects to /bar by itself.
           onPressed: () => context.read<RemoteSyncViewModel>().activate(),
           icon: const Icon(Icons.arrow_forward),
-          label: const Text('Start using KoolTap'),
+          label: Text(_l10n.done),
         ),
       ],
     );

lib/views/settings_view.dart

@@ -53,6 +53,12 @@ class _SettingsScreenViewState extends State<SettingsScreenView> {
     });
   }
 
+  void _leave() {
+    final adminPinViewModel = context.read<AdminPinViewModel>();
+    context.popOrGo('/bar');
+    adminPinViewModel.lock();
+  }
+
   void _cancelVersionHold() {
     _versionHoldTimer?.cancel();
     _versionHoldTimer = null;
@@ -225,7 +231,6 @@ class _SettingsScreenViewState extends State<SettingsScreenView> {
         return;
       }
 
-      adminPinViewModel.lock();
       return;
     }
 
@@ -250,10 +255,7 @@ class _SettingsScreenViewState extends State<SettingsScreenView> {
 
     if (!success) {
       _showError(l10n.errorText(adminPinViewModel.error));
-      return;
     }
-
-    adminPinViewModel.lock();
   }
 
   @override
@@ -263,184 +265,189 @@ class _SettingsScreenViewState extends State<SettingsScreenView> {
     final pinLockViewModel = context.watch<PinLockViewModel>();
     final adminPinViewModel = context.watch<AdminPinViewModel>();
 
-    return Scaffold(
-      appBar: AppBar(
-        leading: IconButton(
-          onPressed: () => context.popOrGo('/bar'),
-          icon: const Icon(Icons.arrow_back),
+    return PopScope(
+      onPopInvokedWithResult: (didPop, result) {
+        if (didPop) context.read<AdminPinViewModel>().lock();
+      },
+      child: Scaffold(
+        appBar: AppBar(
+          leading: IconButton(
+            onPressed: _leave,
+            icon: const Icon(Icons.arrow_back),
+          ),
+          title: Text(l10n.settingsTitle),
         ),
-        title: Text(l10n.settingsTitle),
-      ),
-      body: Builder(
-        builder: (context) {
-          final isLoading =
-              settingsViewModel.isLoading ||
-              pinLockViewModel.isLoading ||
-              adminPinViewModel.isLoading;
-          final hasLoaded =
-              settingsViewModel.hasLoaded &&
-              pinLockViewModel.hasLoaded &&
-              adminPinViewModel.hasLoaded;
+        body: Builder(
+          builder: (context) {
+            final isLoading =
+                settingsViewModel.isLoading ||
+                pinLockViewModel.isLoading ||
+                adminPinViewModel.isLoading;
+            final hasLoaded =
+                settingsViewModel.hasLoaded &&
+                pinLockViewModel.hasLoaded &&
+                adminPinViewModel.hasLoaded;
 
-          if (isLoading && !hasLoaded) {
-            return const Center(
-              child: CircularProgressIndicator(strokeWidth: 2.5),
-            );
-          }
+            if (isLoading && !hasLoaded) {
+              return const Center(
+                child: CircularProgressIndicator(strokeWidth: 2.5),
+              );
+            }
 
-          final settings = settingsViewModel.settings;
+            final settings = settingsViewModel.settings;
 
-          return ListView(
-            padding: const EdgeInsets.symmetric(vertical: 12),
-            children: [
-              _SettingsSection(
-                title: l10n.security,
-                children: [
-                  _SettingsSwitchTile(
-                    icon: Icons.lock_outline_rounded,
-                    title: l10n.pinRequired,
-                    value: settings.pinRequired,
-                    onChanged: (value) {
-                      if (value) {
-                        _enablePin();
-                      } else {
-                        _disablePin();
-                      }
-                    },
-                  ),
-                  _SettingsSwitchTile(
-                    icon: Icons.lock_clock_rounded,
-                    title: l10n.autoLockOnExit,
-                    value: settings.autoLockEnabled,
-                    onChanged: (value) {
-                      settingsViewModel.updateAutoLockEnabled(value);
-                    },
-                  ),
-                  if (settings.pinRequired)
-                    _SettingsTile(
-                      icon: Icons.pin_rounded,
-                      title: l10n.changePin,
-                      onTap: _changePin,
-                    ),
-                  _SettingsTile(
-                    icon: Icons.admin_panel_settings_outlined,
-                    title: l10n.adminPin,
-                    subtitle: adminPinViewModel.isPinSet
-                        ? l10n.adminPinConfigured
-                        : l10n.adminPinNotSet,
-                    onTap: _configureAdminPin,
-                  ),
-                ],
-              ),
-              _SettingsSection(
-                title: l10n.appearance,
-                children: [
-                  _SettingsTile(
-                    icon: Icons.language_rounded,
-                    title: l10n.language,
-                    subtitle: switch (settings.language) {
-                      AppLanguage.system => l10n.languageSystem,
-                      AppLanguage.english => l10n.languageEnglish,
-                      AppLanguage.dutch => l10n.languageDutch,
-                    },
-                    onTap: () async {
-                      final selected = await _pickOption(
-                        context,
-                        options: AppLanguage.values,
-                        selected: settings.language,
-                        label: (language) => switch (language) {
-                          AppLanguage.system => l10n.languageSystem,
-                          AppLanguage.english => l10n.languageEnglish,
-                          AppLanguage.dutch => l10n.languageDutch,
-                        },
-                      );
-
-                      if (selected != null) {
-                        await settingsViewModel.updateLanguage(selected);
-                      }
-                    },
-                  ),
-                  _SettingsTile(
-                    icon: Icons.grid_view_rounded,
-                    title: l10n.productGridRows,
-                    subtitle: l10n.rowsCount(settings.barGridRows),
-                    onTap: () async {
-                      final selected = await _pickOption(
-                        context,
-                        options: const [2, 3, 4, 5, 6],
-                        selected: settings.barGridRows,
-                        label: l10n.rowsCount,
-                      );
-
-                      if (selected != null) {
-                        await settingsViewModel.updateBarGridRows(selected);
-                      }
-                    },
-                  ),
-                  _SettingsTile(
-                    icon: Icons.brightness_6_rounded,
-                    title: l10n.theme,
-                    subtitle: switch (settings.themeMode) {
-                      AppThemeMode.system => l10n.system,
-                      AppThemeMode.light => l10n.light,
-                      AppThemeMode.dark => l10n.dark,
-                      AppThemeMode.ugly => l10n.ugly,
-                    },
-                    onTap: () async {
-                      final selected = await _pickOption(
-                        context,
-                        options: AppThemeMode.values,
-                        selected: settings.themeMode,
-                        label: (mode) => switch (mode) {
-                          AppThemeMode.system => l10n.system,
-                          AppThemeMode.light => l10n.light,
-                          AppThemeMode.dark => l10n.dark,
-                          AppThemeMode.ugly => l10n.ugly,
-                        },
-                      );
-
-                      if (selected != null) {
-                        await settingsViewModel.updateThemeMode(selected);
-                      }
-                    },
-                  ),
-                ],
-              ),
-              if (Platform.isAndroid)
+            return ListView(
+              padding: const EdgeInsets.symmetric(vertical: 12),
+              children: [
                 _SettingsSection(
-                  title: l10n.updates,
+                  title: l10n.security,
                   children: [
+                    _SettingsSwitchTile(
+                      icon: Icons.lock_outline_rounded,
+                      title: l10n.pinRequired,
+                      value: settings.pinRequired,
+                      onChanged: (value) {
+                        if (value) {
+                          _enablePin();
+                        } else {
+                          _disablePin();
+                        }
+                      },
+                    ),
+                    _SettingsSwitchTile(
+                      icon: Icons.lock_clock_rounded,
+                      title: l10n.autoLockOnExit,
+                      value: settings.autoLockEnabled,
+                      onChanged: (value) {
+                        settingsViewModel.updateAutoLockEnabled(value);
+                      },
+                    ),
+                    if (settings.pinRequired)
+                      _SettingsTile(
+                        icon: Icons.pin_rounded,
+                        title: l10n.changePin,
+                        onTap: _changePin,
+                      ),
                     _SettingsTile(
-                      icon: Icons.system_update_alt_rounded,
-                      title: settingsViewModel.checkingForUpdates
-                          ? l10n.checkingForUpdates
-                          : l10n.checkForUpdates,
-                      onTap: settingsViewModel.checkingForUpdates
-                          ? null
-                          : _checkForUpdates,
+                      icon: Icons.admin_panel_settings_outlined,
+                      title: l10n.adminPin,
+                      subtitle: adminPinViewModel.isPinSet
+                          ? l10n.adminPinConfigured
+                          : l10n.adminPinNotSet,
+                      onTap: _configureAdminPin,
                     ),
                   ],
                 ),
-              const SizedBox(height: 40),
-              GestureDetector(
-                onTapDown: (_) => _startVersionHold(),
-                onTapUp: (_) => _cancelVersionHold(),
-                onTapCancel: _cancelVersionHold,
-                child: Center(
-                  child: Text(
-                    l10n.version(_appVersion),
-                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                      color: Theme.of(
-                        context,
-                      ).colorScheme.onSurface.withValues(alpha: 0.5),
+                _SettingsSection(
+                  title: l10n.appearance,
+                  children: [
+                    _SettingsTile(
+                      icon: Icons.language_rounded,
+                      title: l10n.language,
+                      subtitle: switch (settings.language) {
+                        AppLanguage.system => l10n.languageSystem,
+                        AppLanguage.english => l10n.languageEnglish,
+                        AppLanguage.dutch => l10n.languageDutch,
+                      },
+                      onTap: () async {
+                        final selected = await _pickOption(
+                          context,
+                          options: AppLanguage.values,
+                          selected: settings.language,
+                          label: (language) => switch (language) {
+                            AppLanguage.system => l10n.languageSystem,
+                            AppLanguage.english => l10n.languageEnglish,
+                            AppLanguage.dutch => l10n.languageDutch,
+                          },
+                        );
+
+                        if (selected != null) {
+                          await settingsViewModel.updateLanguage(selected);
+                        }
+                      },
+                    ),
+                    _SettingsTile(
+                      icon: Icons.grid_view_rounded,
+                      title: l10n.productGridRows,
+                      subtitle: l10n.rowsCount(settings.barGridRows),
+                      onTap: () async {
+                        final selected = await _pickOption(
+                          context,
+                          options: const [2, 3, 4, 5, 6],
+                          selected: settings.barGridRows,
+                          label: l10n.rowsCount,
+                        );
+
+                        if (selected != null) {
+                          await settingsViewModel.updateBarGridRows(selected);
+                        }
+                      },
+                    ),
+                    _SettingsTile(
+                      icon: Icons.brightness_6_rounded,
+                      title: l10n.theme,
+                      subtitle: switch (settings.themeMode) {
+                        AppThemeMode.system => l10n.system,
+                        AppThemeMode.light => l10n.light,
+                        AppThemeMode.dark => l10n.dark,
+                        AppThemeMode.ugly => l10n.ugly,
+                      },
+                      onTap: () async {
+                        final selected = await _pickOption(
+                          context,
+                          options: AppThemeMode.values,
+                          selected: settings.themeMode,
+                          label: (mode) => switch (mode) {
+                            AppThemeMode.system => l10n.system,
+                            AppThemeMode.light => l10n.light,
+                            AppThemeMode.dark => l10n.dark,
+                            AppThemeMode.ugly => l10n.ugly,
+                          },
+                        );
+
+                        if (selected != null) {
+                          await settingsViewModel.updateThemeMode(selected);
+                        }
+                      },
+                    ),
+                  ],
+                ),
+                if (Platform.isAndroid)
+                  _SettingsSection(
+                    title: l10n.updates,
+                    children: [
+                      _SettingsTile(
+                        icon: Icons.system_update_alt_rounded,
+                        title: settingsViewModel.checkingForUpdates
+                            ? l10n.checkingForUpdates
+                            : l10n.checkForUpdates,
+                        onTap: settingsViewModel.checkingForUpdates
+                            ? null
+                            : _checkForUpdates,
+                      ),
+                    ],
+                  ),
+                const SizedBox(height: 40),
+                GestureDetector(
+                  onTapDown: (_) => _startVersionHold(),
+                  onTapUp: (_) => _cancelVersionHold(),
+                  onTapCancel: _cancelVersionHold,
+                  child: Center(
+                    child: Text(
+                      l10n.version(_appVersion),
+                      style: Theme.of(context).textTheme.bodySmall?.copyWith(
+                        color: Theme.of(
+                          context,
+                        ).colorScheme.onSurface.withValues(alpha: 0.5),
+                      ),
                     ),
                   ),
                 ),
-              ),
-              const SizedBox(height: 20),
-            ],
-          );
-        },
+                const SizedBox(height: 20),
+              ],
+            );
+          },
+        ),
       ),
     );
   }

make_release.ps1

@@ -106,7 +106,7 @@ Write-Host "Uploading $version to $updateServer..."
 
 Add-Type -AssemblyName System.Net.Http
 $client = [Net.Http.HttpClient]::new()
-$client.Timeout = [TimeSpan]::FromMinutes(5)
+$client.Timeout = [TimeSpan]::FromMinutes(10)
 $client.DefaultRequestHeaders.Add('X-Admin-Token', $token)
 
 $apk = [IO.File]::OpenRead($apkPath)

pubspec.yaml

@@ -2,7 +2,7 @@ name: kooltap
 description: "KoolTap: a tablet point-of-sale app for running bar tabs."
 publish_to: 'none'
 
-version: 1.2.10+0
+version: 1.2.13+0
 
 environment:
   sdk: ^3.12.2

test/app_lifecycle_lock_test.dart

@@ -3,46 +3,60 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:kooltap/app/app_lifecycle_lock.dart';
 
 void main() {
-  test('locks when the app is no longer active', () {
-    var lockCount = 0;
-    final observer = AppLifecycleLockObserver(onLock: () => lockCount++);
+  late DateTime now;
+  late int lockCount;
 
-    for (final state in [
-      AppLifecycleState.inactive,
-      AppLifecycleState.hidden,
-      AppLifecycleState.paused,
-      AppLifecycleState.detached,
-    ]) {
-      observer.didChangeAppLifecycleState(state);
-    }
+  AppLifecycleLockObserver observer({bool Function()? shouldLock}) {
+    return AppLifecycleLockObserver(
+      onLock: () => lockCount++,
+      shouldLock: shouldLock,
+      clock: () => now,
+    );
+  }
 
-    expect(lockCount, 4);
+  setUp(() {
+    now = DateTime(2026, 1, 1, 20);
+    lockCount = 0;
   });
 
-  test('does not lock while the app is active', () {
-    var lockCount = 0;
-    final observer = AppLifecycleLockObserver(onLock: () => lockCount++);
+  test('locks when the app returns after the grace period', () {
+    final lock = observer();
 
-    observer.didChangeAppLifecycleState(AppLifecycleState.resumed);
+    lock.didChangeAppLifecycleState(AppLifecycleState.inactive);
+    lock.didChangeAppLifecycleState(AppLifecycleState.hidden);
+    lock.didChangeAppLifecycleState(AppLifecycleState.paused);
+    now = now.add(const Duration(seconds: 30));
+    lock.didChangeAppLifecycleState(AppLifecycleState.resumed);
+
+    expect(lockCount, 1);
+  });
+
+  test('does not lock after a short trip to the background', () {
+    final lock = observer();
+
+    lock.didChangeAppLifecycleState(AppLifecycleState.paused);
+    now = now.add(const Duration(seconds: 10));
+    lock.didChangeAppLifecycleState(AppLifecycleState.resumed);
+
+    expect(lockCount, 0);
+  });
+
+  test('does not lock when only inactive', () {
+    final lock = observer();
+
+    lock.didChangeAppLifecycleState(AppLifecycleState.inactive);
+    now = now.add(const Duration(minutes: 5));
+    lock.didChangeAppLifecycleState(AppLifecycleState.resumed);
 
     expect(lockCount, 0);
   });
 
   test('does not lock when auto-lock is disabled', () {
-    var lockCount = 0;
-    final observer = AppLifecycleLockObserver(
-      onLock: () => lockCount++,
-      shouldLock: () => false,
-    );
+    final lock = observer(shouldLock: () => false);
 
-    for (final state in [
-      AppLifecycleState.inactive,
-      AppLifecycleState.hidden,
-      AppLifecycleState.paused,
-      AppLifecycleState.detached,
-    ]) {
-      observer.didChangeAppLifecycleState(state);
-    }
+    lock.didChangeAppLifecycleState(AppLifecycleState.paused);
+    now = now.add(const Duration(minutes: 5));
+    lock.didChangeAppLifecycleState(AppLifecycleState.resumed);
 
     expect(lockCount, 0);
   });

test/bar_screen_view_model_test.dart

@@ -131,4 +131,14 @@ void main() {
       expect(viewModel.loadError, isNull);
     },
   );
+
+  test('finds an open tab by name, ignoring case and spaces', () async {
+    viewModel.ensureLoaded();
+    openTabs.add([_tab('Jan'), _tab('Piet')]);
+    await pumpEventQueue();
+
+    expect(viewModel.hasOpenTabNamed(' jan '), true);
+    expect(viewModel.hasOpenTabNamed('Jan', exceptTabId: 'Jan'), false);
+    expect(viewModel.hasOpenTabNamed('Joris'), false);
+  });
 }

test/bar_tab_service_test.dart

@@ -565,5 +565,22 @@ void main() {
         expect(closedTabs.last.customerName, 'First');
       });
     });
+
+    group('hidden products', () {
+      test('a tab holding a deleted product can still be changed', () async {
+        final tab = await service.createTab(customerName: 'John');
+        await service.addProductToTab(
+          tabId: tab.id,
+          product: createTestProduct(),
+        );
+        await DriftProductService(database: database).deleteProduct('prod-1');
+
+        final item = (await service.getTabById(tab.id))!.items.single;
+        await service.adjustTabItemQuantity(tabItemId: item.id, delta: -1);
+        await service.deleteTab(tab.id);
+
+        expect(await service.getTabById(tab.id), isNull);
+      });
+    });
   });
 }

test/closed_tab_model_test.dart

@@ -0,0 +1,87 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:kooltap/models/closed_tab.dart';
+import 'package:kooltap/models/closed_tab_item.dart';
+import 'package:kooltap/models/payment_method.dart';
+
+ClosedTabItem _item({
+  required String id,
+  int quantity = 1,
+  int unitPriceInCents = 400,
+  DateTime? removedAt,
+}) {
+  return ClosedTabItem(
+    id: id,
+    closedTabId: 'closed-1',
+    productId: 'prod-1',
+    productName: 'Beer',
+    quantity: quantity,
+    unitPriceInCents: unitPriceInCents,
+    purchasedAt: DateTime(2026, 1, 1, 20),
+    removedAt: removedAt,
+  );
+}
+
+ClosedTab _tab(List<ClosedTabItem> items) {
+  return ClosedTab(
+    id: 'closed-1',
+    originalTabId: 'tab-1',
+    customerName: 'John',
+    closedAt: DateTime(2026, 1, 1, 23),
+    paymentMethod: PaymentMethod.cash,
+    items: items,
+  );
+}
+
+void main() {
+  group('ClosedTabItem', () {
+    test('charges quantity times unit price', () {
+      expect(
+        _item(id: 'a', quantity: 3, unitPriceInCents: 250).lineTotalInCents,
+        750,
+      );
+    });
+
+    test('charges nothing once removed', () {
+      final removed = _item(id: 'a', removedAt: DateTime(2026, 1, 1, 21));
+
+      expect(removed.isRemoved, true);
+      expect(removed.lineTotalInCents, 0);
+    });
+  });
+
+  group('ClosedTab', () {
+    test('totals only the purchases that were not removed', () {
+      final tab = _tab([
+        _item(id: 'a', unitPriceInCents: 400),
+        _item(id: 'b', unitPriceInCents: 400),
+        _item(id: 'c', unitPriceInCents: 600),
+        _item(id: 'd', unitPriceInCents: 400, removedAt: DateTime(2026)),
+      ]);
+
+      expect(tab.totalInCents, 1400);
+      expect(tab.itemCount, 3);
+    });
+
+    test('is zero when every purchase was removed', () {
+      final tab = _tab([
+        _item(id: 'a', removedAt: DateTime(2026)),
+        _item(id: 'b', removedAt: DateTime(2026)),
+      ]);
+
+      expect(tab.totalInCents, 0);
+      expect(tab.itemCount, 0);
+    });
+  });
+
+  group('PaymentMethod', () {
+    test('round-trips through its stored value', () {
+      for (final method in PaymentMethod.values) {
+        expect(PaymentMethod.fromValue(method.value), method);
+      }
+    });
+
+    test('falls back to cash for an unknown value', () {
+      expect(PaymentMethod.fromValue('bitcoin'), PaymentMethod.cash);
+    });
+  });
+}

test/delete_tab_dialog_test.dart

@@ -0,0 +1,156 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:kooltap/l10n/app_localizations.dart';
+import 'package:kooltap/models/bar_tab.dart';
+import 'package:kooltap/models/tab_item.dart';
+import 'package:kooltap/services/admin_pin_service.dart';
+import 'package:kooltap/services/bar_tab_service.dart';
+import 'package:kooltap/services/pin_lock_service.dart';
+import 'package:kooltap/viewmodels/admin_pin_view_model.dart';
+import 'package:kooltap/viewmodels/bar_screen_view_model.dart';
+import 'package:kooltap/views/dialogs/edit_tab_dialog.dart';
+import 'package:mocktail/mocktail.dart';
+import 'package:provider/provider.dart';
+
+class MockBarTabService extends Mock implements BarTabService {}
+
+class MockAdminPinService extends Mock implements AdminPinService {}
+
+BarTab _tab({required bool withItems}) {
+  return BarTab(
+    id: 'tab-1',
+    customerName: 'John',
+    openedAt: DateTime(2026),
+    items: [
+      if (withItems)
+        const TabItem(
+          id: 'item-1',
+          tabId: 'tab-1',
+          productId: 'beer',
+          productName: 'Beer',
+          quantity: 2,
+          unitPriceInCents: 250,
+        ),
+    ],
+  );
+}
+
+void main() {
+  late MockBarTabService barTabService;
+  late MockAdminPinService adminPinService;
+  late AdminPinViewModel adminPinViewModel;
+
+  setUp(() {
+    barTabService = MockBarTabService();
+    adminPinService = MockAdminPinService();
+    adminPinViewModel = AdminPinViewModel(adminPinService: adminPinService);
+
+    when(() => barTabService.deleteTab(any())).thenAnswer((_) async {});
+    when(() => adminPinService.hasPin()).thenAnswer((_) async => true);
+    when(() => adminPinService.verifyPin('1234')).thenAnswer((_) async => true);
+    when(
+      () => adminPinService.verifyPin('0000'),
+    ).thenAnswer((_) async => false);
+  });
+
+  Future<void> openDialog(WidgetTester tester, BarTab tab) async {
+    await adminPinViewModel.load();
+
+    await tester.pumpWidget(
+      MultiProvider(
+        providers: [
+          ChangeNotifierProvider<BarScreenViewModel>(
+            create: (_) => BarScreenViewModel(barTabService: barTabService),
+          ),
+          ChangeNotifierProvider<AdminPinViewModel>.value(
+            value: adminPinViewModel,
+          ),
+        ],
+        child: MaterialApp(
+          locale: const Locale('en'),
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: Builder(
+            builder: (context) => Scaffold(
+              body: ElevatedButton(
+                onPressed: () => confirmDeleteTab(context, tab),
+                child: const Text('Open'),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    await tester.tap(find.text('Open'));
+    await tester.pumpAndSettle();
+  }
+
+  Future<void> confirmWithPin(WidgetTester tester, String? pin) async {
+    if (pin != null) await tester.enterText(find.byType(TextField), pin);
+    await tester.tap(find.widgetWithText(FilledButton, 'Delete'));
+    await tester.pumpAndSettle();
+  }
+
+  testWidgets('deletes an empty tab without asking for a PIN', (tester) async {
+    await openDialog(tester, _tab(withItems: false));
+
+    expect(find.byType(TextField), findsNothing);
+    await confirmWithPin(tester, null);
+
+    verify(() => barTabService.deleteTab('tab-1')).called(1);
+  });
+
+  testWidgets('deletes a tab with drinks after the right admin PIN', (
+    tester,
+  ) async {
+    await openDialog(tester, _tab(withItems: true));
+    await confirmWithPin(tester, '1234');
+
+    verify(() => barTabService.deleteTab('tab-1')).called(1);
+    expect(adminPinViewModel.isUnlocked, false);
+  });
+
+  testWidgets('keeps a tab with drinks after a wrong admin PIN', (
+    tester,
+  ) async {
+    await openDialog(tester, _tab(withItems: true));
+    await confirmWithPin(tester, '0000');
+
+    verifyNever(() => barTabService.deleteTab(any()));
+  });
+
+  testWidgets('keeps a tab with drinks while the PIN is locked out', (
+    tester,
+  ) async {
+    when(
+      () => adminPinService.verifyPin(any()),
+    ).thenThrow(const PinLockedOutException(Duration(minutes: 1)));
+
+    await openDialog(tester, _tab(withItems: true));
+    await confirmWithPin(tester, '1234');
+
+    verifyNever(() => barTabService.deleteTab(any()));
+  });
+
+  testWidgets('cancelling deletes nothing', (tester) async {
+    await openDialog(tester, _tab(withItems: true));
+    await tester.tap(find.text('Cancel'));
+    await tester.pumpAndSettle();
+
+    verifyNever(() => barTabService.deleteTab(any()));
+  });
+
+  testWidgets('does not ask for a PIN when no admin PIN is set', (
+    tester,
+  ) async {
+    when(() => adminPinService.hasPin()).thenAnswer((_) async => false);
+
+    await openDialog(tester, _tab(withItems: true));
+
+    expect(find.byType(TextField), findsNothing);
+    await confirmWithPin(tester, null);
+
+    verify(() => barTabService.deleteTab('tab-1')).called(1);
+  });
+}

test/export_service_test.dart

@@ -0,0 +1,128 @@
+import 'dart:convert';
+
+import 'package:drift/native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/testing.dart';
+import 'package:kooltap/database/app_database.dart';
+import 'package:kooltap/models/payment_method.dart';
+import 'package:kooltap/models/product.dart';
+import 'package:kooltap/services/bar_tab_service.dart';
+import 'package:kooltap/services/export_service.dart';
+import 'package:package_info_plus/package_info_plus.dart';
+
+const _beer = Product(
+  id: 'beer',
+  name: 'Beer',
+  category: 'Drinks',
+  stockQuantity: 10,
+  lowStockThreshold: 2,
+  priceInCents: 250,
+);
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  late AppDatabase database;
+  late DriftBarTabService tabs;
+  late List<http.Request> requests;
+  late http.Response Function() respond;
+
+  DefaultExportService exportService({String? token}) {
+    return DefaultExportService(
+      barTabService: tabs,
+      authToken: () async => token,
+      client: MockClient((request) async {
+        requests.add(request);
+        return respond();
+      }),
+    );
+  }
+
+  setUp(() async {
+    PackageInfo.setMockInitialValues(
+      appName: 'KoolTap',
+      packageName: 'com.kooltap',
+      version: '1.2.12',
+      buildNumber: '1',
+      buildSignature: '',
+    );
+
+    database = AppDatabase(NativeDatabase.memory());
+    tabs = DriftBarTabService(database: database);
+    requests = [];
+    respond = () => http.Response('', 201);
+
+    await database
+        .into(database.products)
+        .insert(
+          ProductsCompanion.insert(
+            id: _beer.id,
+            name: _beer.name,
+            category: _beer.category,
+            stockQuantity: _beer.stockQuantity,
+            lowStockThreshold: _beer.lowStockThreshold,
+            priceInCents: _beer.priceInCents,
+          ),
+        );
+  });
+
+  tearDown(() async {
+    await database.close();
+  });
+
+  test('backs up the totals that were charged', () async {
+    final tab = await tabs.createTab(customerName: 'John');
+    for (var i = 0; i < 3; i++) {
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+    }
+    final item = (await tabs.getTabById(tab.id))!.items.single;
+    await tabs.adjustTabItemQuantity(tabItemId: item.id, delta: -1);
+    await tabs.closeTab(tab.id, paymentMethod: PaymentMethod.payconiq);
+
+    await exportService().uploadToServer();
+
+    final body = jsonDecode(requests.single.body) as Map<String, dynamic>;
+    final closed = (body['closedTabs'] as List).single as Map<String, dynamic>;
+    final items = closed['items'] as List;
+
+    expect(body['appVersion'], '1.2.12');
+    expect(closed['customerName'], 'John');
+    expect(closed['paymentMethod'], 'payconiq');
+    expect(closed['totalInCents'], 500);
+    expect(closed['itemCount'], 2);
+    expect(items, hasLength(3));
+    expect(items.where((item) => item['isRemoved'] == true), hasLength(1));
+    expect(
+      items.fold<int>(
+        0,
+        (sum, item) => sum + (item['lineTotalInCents'] as int),
+      ),
+      closed['totalInCents'],
+    );
+  });
+
+  test('sends the device token when linked', () async {
+    await exportService(token: 'secret').uploadToServer();
+
+    expect(requests.single.headers['Authorization'], 'Bearer secret');
+  });
+
+  test('sends no token when not linked', () async {
+    await exportService().uploadToServer();
+
+    expect(requests.single.headers.containsKey('Authorization'), false);
+  });
+
+  test('never throws when the server is unreachable', () async {
+    respond = () => throw http.ClientException('offline');
+
+    await expectLater(exportService().uploadToServer(), completes);
+  });
+
+  test('never throws when the server errors', () async {
+    respond = () => http.Response('oops', 500);
+
+    await expectLater(exportService().uploadToServer(), completes);
+  });
+}

test/money_test.dart

@@ -19,4 +19,49 @@ void main() {
       expect(123456.asEuro, '€ 1.234,56');
     });
   });
+
+  group('parseEuroToCents', () {
+    test('accepts a comma or a dot as decimal separator', () {
+      expect(parseEuroToCents('2,50'), 250);
+      expect(parseEuroToCents('2.50'), 250);
+    });
+
+    test('accepts whole euros and a single decimal', () {
+      expect(parseEuroToCents('3'), 300);
+      expect(parseEuroToCents('3,5'), 350);
+      expect(parseEuroToCents('0'), 0);
+    });
+
+    test('ignores surrounding whitespace', () {
+      expect(parseEuroToCents(' 4,20 '), 420);
+    });
+
+    test('is exact where doubles would round', () {
+      expect(parseEuroToCents('0,29'), 29);
+      expect(parseEuroToCents('1,15'), 115);
+      expect(parseEuroToCents('4,35'), 435);
+    });
+
+    test('rejects more than two decimals instead of rounding', () {
+      expect(parseEuroToCents('2,505'), isNull);
+    });
+
+    test('rejects anything that is not a plain amount', () {
+      for (final input in [
+        '',
+        '-1',
+        'abc',
+        '1e3',
+        'NaN',
+        'Infinity',
+        '1.000,50',
+        '2,',
+        ',50',
+        '€2',
+        '1234567',
+      ]) {
+        expect(parseEuroToCents(input), isNull, reason: input);
+      }
+    });
+  });
 }

test/product_service_test.dart

@@ -171,7 +171,7 @@ void main() {
     });
 
     group('deleteProduct', () {
-      test('removes product from database', () async {
+      test('hides the product but keeps its row', () async {
         await database
             .into(database.products)
             .insert(
@@ -187,8 +187,11 @@ void main() {
 
         await service.deleteProduct('delete-test');
 
-        final products = await database.select(database.products).get();
-        expect(products, isEmpty);
+        expect(await service.getProducts(), isEmpty);
+        final row = await service.getProductById('delete-test');
+        expect(row!.active, isFalse);
+
+        await service.increaseStock('delete-test', 1);
       });
     });
 

test/remote_sync_service_test.dart

@@ -146,6 +146,21 @@ void main() {
       expect(server.syncRequests.last['cursor'], 'cursor-1');
     });
 
+    test('leaves undone drinks out of the snapshot total', () async {
+      final tab = await barTabService.createTab(customerName: 'Alice');
+      await barTabService.addProductToTab(tabId: tab.id, product: _beer);
+      await barTabService.addProductToTab(tabId: tab.id, product: _beer);
+      final item = (await barTabService.getTabById(tab.id))!.items.single;
+      await barTabService.adjustTabItemQuantity(tabItemId: item.id, delta: -2);
+
+      await service.sync();
+
+      final snapshot = (server.syncRequests.single['openTabs'] as List).single;
+      expect(snapshot['totalInCents'], 0);
+      expect(snapshot['itemCount'], 0);
+      expect(snapshot['items'], isEmpty);
+    });
+
     test('reports a server error as a failure, not a success', () async {
       server.syncResponse = http.Response('oops', 500);
 
@@ -222,6 +237,31 @@ void main() {
       expect(eventTypes(), contains(RemoteSyncEventType.tabClosedRemotely));
     });
 
+    test('charges what the dashboard saw when it asked', () async {
+      final tab = await barTabService.createTab(customerName: 'Alice');
+      for (var i = 0; i < 3; i++) {
+        await barTabService.addProductToTab(tabId: tab.id, product: _beer);
+      }
+      await service.sync();
+      final seen = (server.syncRequests.last['openTabs'] as List).single;
+
+      server.respondWith({
+        'commands': [
+          _closeCommand(
+            id: 'cmd-1',
+            tabId: tab.id,
+            expectedVersion: seen['version'] as int,
+          ),
+        ],
+      });
+      await service.sync();
+
+      final closed = (await barTabService.getClosedTabs()).single;
+      expect(closed.totalInCents, seen['totalInCents']);
+      expect(closed.totalInCents, 1200);
+      expect((await barTabService.getTabById(tab.id))!.totalInCents, 0);
+    });
+
     test('refuses to close a tab that changed since the request', () async {
       final tab = await barTabService.createTab(customerName: 'Alice');
       await barTabService.addProductToTab(tabId: tab.id, product: _beer);

test/tab_money_test.dart

@@ -0,0 +1,390 @@
+import 'dart:math';
+
+import 'package:drift/drift.dart' hide isNull, isNotNull;
+import 'package:drift/native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:kooltap/database/app_database.dart';
+import 'package:kooltap/models/payment_method.dart';
+import 'package:kooltap/models/product.dart';
+import 'package:kooltap/services/bar_tab_service.dart';
+import 'package:kooltap/services/product_service.dart';
+
+const _beer = Product(
+  id: 'beer',
+  name: 'Beer',
+  category: 'Drinks',
+  stockQuantity: 50,
+  lowStockThreshold: 5,
+  priceInCents: 250,
+);
+
+const _wine = Product(
+  id: 'wine',
+  name: 'Wine',
+  category: 'Drinks',
+  stockQuantity: 20,
+  lowStockThreshold: 5,
+  priceInCents: 450,
+);
+
+const _water = Product(
+  id: 'water',
+  name: 'Tap water',
+  category: 'Drinks',
+  stockQuantity: 0,
+  lowStockThreshold: 0,
+  infiniteStock: true,
+  priceInCents: 0,
+);
+
+/// End-to-end checks on what customers are charged and what leaves the
+/// fridge, against a real (in-memory) database.
+void main() {
+  late AppDatabase database;
+  late DriftBarTabService tabs;
+  late DriftProductService products;
+
+  Future<void> insertProduct(Product product) {
+    return database
+        .into(database.products)
+        .insert(
+          ProductsCompanion.insert(
+            id: product.id,
+            name: product.name,
+            category: product.category,
+            stockQuantity: product.stockQuantity,
+            lowStockThreshold: product.lowStockThreshold,
+            infiniteStock: Value(product.infiniteStock),
+            priceInCents: product.priceInCents,
+          ),
+        );
+  }
+
+  Future<int> stockOf(String productId) async {
+    return (await products.getProductById(productId))!.stockQuantity;
+  }
+
+  Future<int> quantityOnOpenTabs(String productId) async {
+    final open = await tabs.getOpenTabs();
+    return open
+        .expand((tab) => tab.items)
+        .where((item) => item.productId == productId)
+        .fold<int>(0, (sum, item) => sum + item.quantity);
+  }
+
+  Future<int> soldInHistory(String productId) async {
+    final closed = await tabs.getClosedTabs();
+    return closed
+        .expand((tab) => tab.items)
+        .where((item) => item.productId == productId && !item.isRemoved)
+        .fold<int>(0, (sum, item) => sum + item.quantity);
+  }
+
+  Future<String> itemId(String tabId, String productId) async {
+    final tab = (await tabs.getTabById(tabId))!;
+    return tab.items.firstWhere((item) => item.productId == productId).id;
+  }
+
+  setUp(() async {
+    database = AppDatabase(NativeDatabase.memory());
+    tabs = DriftBarTabService(database: database);
+    products = DriftProductService(database: database);
+
+    await insertProduct(_beer);
+    await insertProduct(_wine);
+    await insertProduct(_water);
+  });
+
+  tearDown(() async {
+    await database.close();
+  });
+
+  group('closing a tab', () {
+    test('charges exactly what the open tab showed', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      for (var i = 0; i < 3; i++) {
+        await tabs.addProductToTab(tabId: tab.id, product: _beer);
+      }
+      await tabs.addProductToTab(tabId: tab.id, product: _wine);
+      await tabs.adjustTabItemQuantity(
+        tabItemId: await itemId(tab.id, 'beer'),
+        delta: -1,
+      );
+
+      final open = (await tabs.getTabById(tab.id))!;
+      expect(open.totalInCents, 2 * 250 + 450);
+
+      await tabs.closeTab(tab.id, paymentMethod: PaymentMethod.payconiq);
+
+      final closed = (await tabs.getClosedTabs()).single;
+      expect(closed.totalInCents, open.totalInCents);
+      expect(closed.itemCount, open.itemCount);
+      expect(closed.paymentMethod, PaymentMethod.payconiq);
+      expect(closed.items.where((item) => item.isRemoved), hasLength(1));
+    });
+
+    test('stores each payment method as chosen', () async {
+      for (final method in PaymentMethod.values) {
+        final tab = await tabs.createTab(customerName: method.name);
+        await tabs.addProductToTab(tabId: tab.id, product: _beer);
+        await tabs.closeTab(tab.id, paymentMethod: method);
+      }
+
+      final closed = await tabs.getClosedTabs();
+      expect(
+        {for (final tab in closed) tab.customerName: tab.paymentMethod},
+        {for (final method in PaymentMethod.values) method.name: method},
+      );
+    });
+
+    test('does not record anything for an empty tab', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+
+      await tabs.closeTab(tab.id);
+
+      expect(await tabs.getClosedTabs(), isEmpty);
+    });
+
+    test('records a tab whose drinks were all undone at zero', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+      await tabs.adjustTabItemQuantity(
+        tabItemId: await itemId(tab.id, 'beer'),
+        delta: -1,
+      );
+
+      await tabs.closeTab(tab.id);
+
+      final closed = (await tabs.getClosedTabs()).single;
+      expect(closed.totalInCents, 0);
+      expect(closed.items.single.isRemoved, true);
+    });
+
+    test('never charges the same drink twice', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+      await tabs.closeTab(tab.id);
+
+      await tabs.addProductToTab(tabId: tab.id, product: _wine);
+      await tabs.closeTab(tab.id);
+      await tabs.closeTab(tab.id);
+
+      final closed = await tabs.getClosedTabs();
+      expect(closed, hasLength(2));
+      expect(
+        closed.map((tab) => tab.totalInCents),
+        unorderedEquals([250, 450]),
+      );
+      expect((await tabs.getTabById(tab.id))!.items, isEmpty);
+    });
+
+    test('keeps the tab open under the same name', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+
+      await tabs.closeTab(tab.id);
+
+      final reopened = (await tabs.getTabById(tab.id))!;
+      expect(reopened.customerName, 'John');
+      expect(reopened.totalInCents, 0);
+    });
+
+    test('a failed version check changes nothing', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+      final staleVersion = (await tabs.getTabById(tab.id))!.version;
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+
+      await expectLater(
+        tabs.closeTab(tab.id, expectedVersion: staleVersion),
+        throwsA(isA<TabVersionConflictException>()),
+      );
+
+      expect(await tabs.getClosedTabs(), isEmpty);
+      expect((await tabs.getTabById(tab.id))!.totalInCents, 500);
+    });
+  });
+
+  group('prices', () {
+    test('a tab keeps the price a drink was rung up at', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+
+      await products.updateProduct(_beer.copyWith(priceInCents: 300));
+      await tabs.closeTab(tab.id);
+
+      expect((await tabs.getClosedTabs()).single.totalInCents, 250);
+    });
+
+    test('a new tab uses the current price', () async {
+      final updated = _beer.copyWith(priceInCents: 300);
+      await products.updateProduct(updated);
+
+      final tab = await tabs.createTab(customerName: 'Jane');
+      await tabs.addProductToTab(tabId: tab.id, product: updated);
+
+      expect((await tabs.getTabById(tab.id))!.totalInCents, 300);
+    });
+
+    test('free products add nothing to the total', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _water);
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+
+      final open = (await tabs.getTabById(tab.id))!;
+      expect(open.totalInCents, 250);
+      expect(open.itemCount, 2);
+    });
+  });
+
+  group('stock', () {
+    test('every bottle is either in the fridge, on a tab or sold', () async {
+      final random = Random(42);
+      final tabIds = [
+        for (final name in ['A', 'B', 'C', 'D'])
+          (await tabs.createTab(customerName: name)).id,
+      ];
+
+      for (var step = 0; step < 300; step++) {
+        final tabId = tabIds[random.nextInt(tabIds.length)];
+        final product = random.nextBool() ? _beer : _wine;
+
+        try {
+          switch (random.nextInt(10)) {
+            case < 6:
+              await tabs.addProductToTab(tabId: tabId, product: product);
+            case < 8:
+              final tab = (await tabs.getTabById(tabId))!;
+              if (tab.items.isEmpty) continue;
+              final item = tab.items[random.nextInt(tab.items.length)];
+              await tabs.adjustTabItemQuantity(
+                tabItemId: item.id,
+                delta: random.nextInt(5) - 2,
+              );
+            case 8:
+              await tabs.closeTab(tabId);
+            default:
+              await tabs.deleteTab(tabId);
+              tabIds.remove(tabId);
+              tabIds.add((await tabs.createTab(customerName: 'New')).id);
+          }
+        } on InsufficientStockException {
+          // Running out is part of the scenario.
+        }
+
+        for (final product in [_beer, _wine]) {
+          final accounted =
+              await stockOf(product.id) +
+              await quantityOnOpenTabs(product.id) +
+              await soldInHistory(product.id);
+          expect(accounted, product.stockQuantity, reason: 'step $step');
+          expect(await stockOf(product.id), greaterThanOrEqualTo(0));
+        }
+      }
+    });
+
+    test('can never sell more than is in stock', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      var sold = 0;
+
+      for (var i = 0; i < _wine.stockQuantity + 5; i++) {
+        try {
+          await tabs.addProductToTab(tabId: tab.id, product: _wine);
+          sold++;
+        } on InsufficientStockException {
+          // Expected once the wine runs out.
+        }
+      }
+
+      expect(sold, _wine.stockQuantity);
+      expect(await stockOf('wine'), 0);
+      expect((await tabs.getTabById(tab.id))!.totalInCents, 20 * 450);
+    });
+
+    test('simultaneous orders for the last bottle sell it once', () async {
+      await products.updateProduct(_wine.copyWith(stockQuantity: 1));
+      final first = await tabs.createTab(customerName: 'A');
+      final second = await tabs.createTab(customerName: 'B');
+
+      final results = await Future.wait([
+        for (final tab in [first, second])
+          tabs
+              .addProductToTab(tabId: tab.id, product: _wine)
+              .then((_) => true)
+              .catchError(
+                (_) => false,
+                test: (e) => e is InsufficientStockException,
+              ),
+      ]);
+
+      expect(results.where((ok) => ok), hasLength(1));
+      expect(await stockOf('wine'), 0);
+      expect(await quantityOnOpenTabs('wine'), 1);
+    });
+
+    test('raising a quantity past the stock adds nothing', () async {
+      await products.updateProduct(_wine.copyWith(stockQuantity: 2));
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _wine);
+
+      await expectLater(
+        tabs.adjustTabItemQuantity(
+          tabItemId: await itemId(tab.id, 'wine'),
+          delta: 5,
+        ),
+        throwsA(isA<InsufficientStockException>()),
+      );
+
+      expect(await stockOf('wine'), 1);
+      expect((await tabs.getTabById(tab.id))!.items.single.quantity, 1);
+    });
+
+    test('lowering past zero only returns what was on the tab', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+
+      final applied = await tabs.adjustTabItemQuantity(
+        tabItemId: await itemId(tab.id, 'beer'),
+        delta: -10,
+      );
+
+      expect(applied, -2);
+      expect(await stockOf('beer'), _beer.stockQuantity);
+    });
+
+    test('closing a tab does not touch stock', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+      await tabs.addProductToTab(tabId: tab.id, product: _beer);
+
+      await tabs.closeTab(tab.id);
+
+      expect(await stockOf('beer'), _beer.stockQuantity - 1);
+    });
+
+    test('infinite stock is never counted down or run out', () async {
+      final tab = await tabs.createTab(customerName: 'John');
+
+      for (var i = 0; i < 5; i++) {
+        await tabs.addProductToTab(tabId: tab.id, product: _water);
+      }
+      await tabs.deleteTab(tab.id);
+
+      expect(await stockOf('water'), 0);
+    });
+
+    test('a failed add leaves no item behind', () async {
+      await products.updateProduct(_wine.copyWith(stockQuantity: 0));
+      final tab = await tabs.createTab(customerName: 'John');
+
+      await expectLater(
+        tabs.addProductToTab(tabId: tab.id, product: _wine),
+        throwsA(isA<InsufficientStockException>()),
+      );
+
+      final open = (await tabs.getTabById(tab.id))!;
+      expect(open.items, isEmpty);
+      expect(open.totalInCents, 0);
+    });
+  });
+}