fix(downloads): Use mediaSource.Id instead of item.Id in direct download URL (#1666)

Co-authored-by: lance chant <13349722+lancechant@users.noreply.github.com>
Co-authored-by: Gauvain <contact@uruk.dev>

utils/jellyfin/media/getDownloadUrl.ts

@@ -50,7 +50,7 @@ export const getDownloadUrl = async ({
   if (maxBitrate.key === "Max" && !streamDetails?.mediaSource?.TranscodingUrl) {
     console.log("Downloading item directly");
     return {
-      url: `${api.basePath}/Items/${item.Id}/Download?api_key=${api.accessToken}`,
+      url: `${api.basePath}/Items/${mediaSource.Id}/Download?api_key=${api.accessToken}`,
       mediaSource: streamDetails?.mediaSource ?? null,
     };
   }