feat: New Open Tab dialog with search and optional customer email. Drinks are now grouped per order. Payments trigger cha-ching and money rain.

lib/views/admin_screen_view.dart

@@ -8,7 +8,6 @@ import '../models/remote_command.dart';
 import '../utils/navigation.dart';
 import '../viewmodels/admin_pin_view_model.dart';
 import '../viewmodels/remote_sync_view_model.dart';
-import 'dialogs/new_tab_dialog.dart';
 
 class AdminScreenView extends StatelessWidget {
   const AdminScreenView({super.key});
@@ -19,16 +18,6 @@ class AdminScreenView extends StatelessWidget {
     adminPinViewModel.lock();
   }
 
-  Future<void> _openNewTab(BuildContext context) async {
-    final l10n = AppLocalizations.of(context);
-    final name = await showNewTabDialog(context);
-
-    if (name == null || !context.mounted) return;
-    ScaffoldMessenger.of(
-      context,
-    ).showSnackBar(SnackBar(content: Text(l10n.tabOpened(name))));
-  }
-
   Future<void> _confirmUnlink(BuildContext context) async {
     final l10n = AppLocalizations.of(context);
     final confirmed = await showDialog<bool>(
@@ -94,12 +83,6 @@ class AdminScreenView extends StatelessWidget {
             _AdminSection(
               title: l10n.adminTools,
               children: [
-                _AdminTile(
-                  icon: Icons.person_add_alt_1_outlined,
-                  title: l10n.openNewTab,
-                  subtitle: l10n.openNewTabDescription,
-                  onTap: () => _openNewTab(context),
-                ),
                 _AdminTile(
                   icon: Icons.inventory_2_outlined,
                   title: l10n.products,