fix: formatting

lib/viewmodels/inventory_view_model.dart

@@ -6,9 +6,7 @@ import '../services/product_service.dart';
 class InventoryViewModel extends ChangeNotifier {
   final ProductService productService;
 
-  InventoryViewModel({
-    required this.productService,
-  });
+  InventoryViewModel({required this.productService});
 
   List<Product> _products = [];
 
@@ -19,43 +17,31 @@ class InventoryViewModel extends ChangeNotifier {
     notifyListeners();
   }
 
-  Future<void> decreaseStock(
-      String productId,
-      int amount,
-      ) async {
+  Future<void> decreaseStock(String productId, int amount) async {
     await productService.decreaseStock(productId, amount);
 
-    final index = _products.indexWhere(
-          (product) => product.id == productId,
-    );
+    final index = _products.indexWhere((product) => product.id == productId);
 
     if (index != -1) {
       _products[index] = _products[index].copyWith(
-        stockQuantity:
-        _products[index].stockQuantity - amount,
+        stockQuantity: _products[index].stockQuantity - amount,
       );
     }
 
     notifyListeners();
   }
 
-  Future<void> increaseStock(
-      String productId,
-      int amount,
-      ) async {
+  Future<void> increaseStock(String productId, int amount) async {
     await productService.increaseStock(productId, amount);
 
-    final index = _products.indexWhere(
-          (product) => product.id == productId,
-    );
+    final index = _products.indexWhere((product) => product.id == productId);
 
     if (index != -1) {
       _products[index] = _products[index].copyWith(
-        stockQuantity:
-        _products[index].stockQuantity + amount,
+        stockQuantity: _products[index].stockQuantity + amount,
       );
     }
 
     notifyListeners();
   }
-}
+}