Try skip polling

For large medias, API returns 202 Accepted and media is still processing https://docs.joinmastodon.org/methods/media/#v2

masto.js does extra manual poll check by GET-ing the media after uploaded to see if the media is done processing

src/components/compose.jsx

@@ -520,6 +520,7 @@ function Compose({
                     const params = {
                       file,
                       description,
+                      skipPolling: true,
                     };
                     return masto.mediaAttachments.create(params).then((res) => {
                       if (res.id) {