feat: add default mock data

lib/viewmodels/dev_menu_view_model.dart

@@ -1,8 +1,12 @@
+import 'dart:io';
+
 import 'package:flutter/foundation.dart';
 import 'package:drift/drift.dart';
+import 'package:path_provider/path_provider.dart';
 import 'package:kooltab2/database/app_database.dart';
 import 'package:kooltab2/services/bar_tab_service.dart';
 import 'package:kooltab2/models/payment_method.dart';
+import 'package:kooltab2/services/default_product_seeder.dart';
 import 'package:kooltab2/services/pin_lock_service.dart';
 import 'package:kooltab2/services/product_service.dart';
 import 'package:kooltab2/services/settings_service.dart';
@@ -78,6 +82,67 @@ class DevMenuViewModel extends ChangeNotifier {
     }
   }
 
+  Future<void> seedDefaultProducts() async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      await DefaultProductSeeder(database: database).seedIfEmpty();
+      final count = await _getProductCount();
+      _lastAction = 'Seeded default products ($count total)';
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<void> clearAndReseedProducts() async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      await database.transaction(() async {
+        await database.delete(database.tabItems).go();
+        await database.delete(database.products).go();
+      });
+      await DefaultProductSeeder(database: database).seedIfEmpty();
+      final count = await _getProductCount();
+      _lastAction = 'Cleared and reseeded ($count products)';
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
+
+  Future<int> _getProductCount() async {
+    final countExpr = database.products.id.count();
+    final query = database.selectOnly(database.products)
+      ..addColumns([countExpr]);
+    final row = await query.getSingle();
+    return row.read(countExpr) ?? 0;
+  }
+
+  Future<void> clearProductImages() async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      final appDir = await getApplicationSupportDirectory();
+      final imagesDir = Directory('${appDir.path}/product_images');
+      if (await imagesDir.exists()) {
+        await imagesDir.delete(recursive: true);
+      }
+      _lastAction = 'Product images cleared';
+    } catch (e, stack) {
+      debugPrint('DevMenuViewModel: clearProductImages error: $e');
+      Sentry.captureException(e, stackTrace: stack);
+      _lastAction = 'Failed to clear images: $e';
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
+
   Future<void> resetAllStock() async {
     _isLoading = true;
     notifyListeners();