修复二维码库存与过期时间编辑

backend/internal/modules/chat/handler_qrcode.go

@@ -58,11 +58,11 @@ func (h *Handler) ListQrCodesHandler(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{
-		"data": qrcodes,
-		"pagination": gin.H{
-			"total": total,
-			"page":  req.Page,
-			"limit": req.Limit,
+		"data": PaginatedResult{
+			Items:    qrcodes,
+			Total:    total,
+			Page:     req.Page,
+			PageSize: req.Limit,
 		},
 	})
 }