Update index.js

index.js

@@ -344,7 +344,7 @@ export async function imageTextToText(
 async function updatePreview(url) {
   const image = await RawImage.fromURL(url);
   const ar = image.width / image.height;
-  const [cw, ch] = (ar > 1) ? [640, 640 / ar] : [640 * ar, 640];
+  const [cw, ch] = (ar > 1) ? [320, 320 / ar] : [320 * ar, 320];
   thumb.style.width = `${cw}px`;
   thumb.style.height = `${ch}px`;
   thumb.style.backgroundImage = `url(${url})`;