fix(shop): 修复未登录用户可领取优惠券的bug- 在领取优惠券接口中增加了登录验证逻辑

- 确保只有已登录用户才能领取优惠券

src/main/java/com/gxwebsoft/shop/controller/ShopUserCouponController.java

@@ -117,6 +117,8 @@ public class ShopUserCouponController extends BaseController {
     @Operation(summary = "领取优惠券")
     @PostMapping("/take")
     public ApiResult<?> take(@RequestBody ShopUserCoupon userCoupon) {
+      final User loginUser = getLoginUser();
+      if (loginUser == null) return fail("请先登录");
       ShopCoupon coupon = couponService.getByIdRel(userCoupon.getCouponId());
         if (coupon.getTotalCount() != -1 && coupon.getReceiveNum() >= coupon.getTotalCount()) return fail("已经被领完了");
         List<ShopUserCoupon> userCouponList = shopUserCouponService.list(