Fix manga page background image styling

In chromium browser there seems to be some layout issue depending on the available width.
In that case, there is a small part of the image visible that is not behind the applied "backdrop filter".
Which makes it look like a small bright vertical bar because it has the normal brightness of the image.

src/features/manga/components/details/MangaDetails.tsx

@@ -80,6 +80,7 @@ const TopContentWrapper = ({
     <Stack
         sx={{
             position: 'relative',
+            overflow: 'hidden',
         }}
     >
         {mangaThumbnailBackdrop && (