feat(shopping): 添加购物车删除功能

- 实现了购物车删除接口，支持通过ID删除指定购物车
- 添加事务注解确保删除操作的数据一致性
- 集成业务验证逻辑，检查购物车是否存在及状态是否允许删除
- 实现关联数据清理，包括购物车项目、配件和服务的级联删除
- 优化代码格式，统一方法体内的空格规范

nflg-mobilebroken-quotation/src/main/java/com/nflg/mobilebroken/quotation/controller/app/ShoppingController.java

@@ -242,6 +242,28 @@ public class ShoppingController extends ControllerBase {
         return ApiResult.success(shoppingCartService.search(request, MultilingualUtil.getLanguage()));
     }
 
+    /**
+     * 删除购物车
+     */
+    @Transactional
+    @PostMapping("/delete")
+    public ApiResult<Void> delete(@RequestParam Long id) {
+        QuotationShoppingCart cart = shoppingCartService.getById(id);
+        VUtils.trueThrowBusinessError(Objects.isNull(cart)).throwMessage("未找到购物车信息");
+        VUtils.trueThrowBusinessError(cart.getStatus() == 1).throwMessage("已生成报价单不能删除");
+        shoppingCartItemService.lambdaUpdate()
+                .eq(QuotationShoppingCartItem::getCartId, id)
+                .remove();
+        shoppingCartAccessoryService.lambdaUpdate()
+                .eq(QuotationShoppingCartAccessory::getCartId, id)
+                .remove();
+        shoppingCartServiceService.lambdaUpdate()
+                .eq(QuotationShoppingCartService::getCartId, id)
+                .remove();
+        shoppingCartService.removeById(id);
+        return ApiResult.success();
+    }
+
     private Pair<BigDecimal, BigDecimal> getRatio(Long modelId, Long categoryId) {
         Pair<BigDecimal, BigDecimal> pair = Pair.of(BigDecimal.ONE, BigDecimal.ONE);
         if (AppUserUtil.isAgent()) {