fix(cart): refresh state after expiration

src/app/shared/components/cart/cart.component.spec.ts

@@ -175,6 +175,63 @@ describe('CartComponent', () => {
     expect(removeItem).not.toHaveBeenCalled();
   });
 
+  it('notifies the user and refreshes the cart when a mutation reports expiration', async () => {
+    const expirationMessage = 'La reserva de stock venció. Usá el carrito activo para continuar.';
+    const removeItem = vi.fn().mockReturnValue(
+      throwError(() => ({
+        error: {
+          code: 'stock_reservation.expired',
+          message: expirationMessage,
+        },
+      })),
+    );
+    const loadCart = vi.fn().mockReturnValue(of({}));
+    const danger = vi.fn();
+
+    await TestBed.configureTestingModule({
+      imports: [CartComponent],
+      providers: [
+        {
+          provide: CartService,
+          useValue: {
+            cart: signal(null).asReadonly(),
+            loadCart,
+            updateItemQuantity: vi.fn(),
+            removeItem,
+          },
+        },
+        {
+          provide: ModalService,
+          useValue: { openConfirmDelete: vi.fn().mockReturnValue(of(true)) },
+        },
+        {
+          provide: ToastService,
+          useValue: { success: vi.fn(), info: vi.fn(), danger },
+        },
+      ],
+    }).compileComponents();
+
+    const fixture = TestBed.createComponent(CartComponent);
+    fixture.componentRef.setInput('items', [
+      {
+        cartItemId: 10,
+        imageUrl: null,
+        product: 'Producto vencido',
+        originalPrice: null,
+        discountedPrice: 1000,
+        discountPercentage: null,
+        attributes: [],
+        quantity: 1,
+      },
+    ]);
+    fixture.detectChanges();
+
+    fixture.debugElement.query(By.css('app-cart-item')).triggerEventHandler('remove');
+
+    expect(danger).toHaveBeenCalledWith(expirationMessage);
+    expect(loadCart).toHaveBeenCalledOnce();
+  });
+
   it('optimistically updates quantity and rolls back on error', async () => {
     vi.useFakeTimers();
     const updateItemQuantity = vi.fn().mockReturnValue(throwError(() => new Error('Error')));

src/app/shared/components/cart/cart.component.ts

@@ -98,11 +98,12 @@ export class CartComponent {
                     this.clearOverride(update.cartItemId);
                   },
                   error: (err: HttpErrorResponse) => {
-                    console.error('Error updating cart quantity', err);
-                    const msg =
-                      err.error?.message || 'Error al actualizar la cantidad del producto.';
-                    this.toastService.danger(msg);
                     this.clearOverride(update.cartItemId);
+                    this.handleMutationError(
+                      err,
+                      'Error al actualizar la cantidad del producto.',
+                      'Error updating cart quantity',
+                    );
                   },
                 }),
                 catchError(() => EMPTY),
@@ -205,9 +206,12 @@ export class CartComponent {
           this.toastService.success(response.message || 'Variante actualizada.');
         },
         error: (error: HttpErrorResponse) => {
-          console.error('Error updating cart item variant', error);
           this.clearVariantOverride(cartItemId);
-          this.toastService.danger(error.error?.message || 'No se pudo actualizar la variante.');
+          this.handleMutationError(
+            error,
+            'No se pudo actualizar la variante.',
+            'Error updating cart item variant',
+          );
         },
       });
   }
@@ -305,10 +309,29 @@ export class CartComponent {
         this.toastService.info(msg);
       },
       error: (err: HttpErrorResponse) => {
-        console.error('Error removing item from cart', err);
-        const msg = err.error?.message || 'Error al eliminar el producto del carrito.';
-        this.toastService.danger(msg);
+        this.handleMutationError(
+          err,
+          'Error al eliminar el producto del carrito.',
+          'Error removing item from cart',
+        );
       },
     });
   }
+
+  private handleMutationError(
+    error: HttpErrorResponse,
+    fallbackMessage: string,
+    logMessage: string,
+  ): void {
+    console.error(logMessage, error);
+    this.toastService.danger(error.error?.message || fallbackMessage);
+
+    if (error.error?.code !== 'stock_reservation.expired') {
+      return;
+    }
+
+    this.cartService.loadCart().subscribe({
+      error: (refreshError) => console.error('Error refreshing expired cart', refreshError),
+    });
+  }
 }