倍率问题和图片问题调整

backend/internal/httpapi/assets.go

@@ -295,9 +295,14 @@ func (h *assetsHandler) download(w http.ResponseWriter, r *http.Request, public
 		return
 	}
 	defer blob.Body.Close()
-	disposition := contentDisposition(a.Name)
+	name, blob, err := assets.NormalizeImageDownload(a.Name, blob)
+	if err != nil {
+		writeAssetError(w, err, public, "")
+		return
+	}
+	disposition := contentDisposition(name)
 	if inline {
-		disposition = inlineContentDisposition(a.Name)
+		disposition = inlineContentDisposition(name)
 	}
 	writeBlob(w, blob, "private, no-store", disposition)
 }