fix: gallery favorite button styles returned after fav were incorrect

src/components/FavoriteButton.tsx

···
 }>) {
   const variantClass = variant === "icon-button"
     ? "flex w-fit items-center gap-2 m-0 p-0 mt-2"
-    : undefined;
+    : "flex-1";
   const galleryRkey = new AtUri(gallery.uri).rkey;
   const favRrkey = gallery.viewer?.fav
     ? new AtUri(gallery.viewer.fav).rkey

src/components/GalleryPage.tsx

···
         {!isCreator
           ? (
             <div class="flex self-start gap-2 flex-row w-full sm:w-fit">
-              <FavoriteButton class="flex-1" gallery={gallery} />
+              <FavoriteButton gallery={gallery} />
               <CommentsButton class="flex-1" gallery={gallery} />
               <ShareGalleryDialogButton class="flex-1" gallery={gallery} />
             </div>