优化结构

internal/server/handler/media.go

@@ -2,6 +2,7 @@ package handler
 
 import (
 	"errors"
+	"kra/internal/biz/system"
 	"kra/internal/service/dto"
 	systemservice "kra/internal/service/system"
 	"net/http"
@@ -16,7 +17,7 @@ func NewMedia(service *systemservice.MediaService) *Media { return &Media{servic
 
 func (h *Media) limitMultipartBody(c *gin.Context) int64 {
 	limit := h.service.MediaConfig().EffectiveMaxFileSize()
-	c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, limit+(1<<20))
+	c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, limit+system.UploadBodyOverhead)
 	return limit
 }