优化历史包袱,修复发布页面默认0 恢哈伏笔

backend/internal/modules/listing/service.go

@@ -2,6 +2,7 @@ package listing
 
 import (
 	"errors"
+	"strings"
 )
 
 var (
@@ -151,5 +152,17 @@ func validateRequest(req CreateRequest) error {
 	if req.HafCoinAmount < 0 {
 		return ErrInvalidInput
 	}
+	if !hasScreenshotURL(req.ScreenshotURLS) {
+		return ErrInvalidInput
+	}
 	return nil
 }
+
+func hasScreenshotURL(urls []string) bool {
+	for _, url := range urls {
+		if strings.TrimSpace(url) != "" {
+			return true
+		}
+	}
+	return false
+}