refactor: improve layout of completed signing page

packages/ui/components/document/document-share-button.tsx

@@ -127,11 +127,11 @@ export const DocumentShareButton = ({
           <Button
             variant="outline"
             disabled={!token || !documentId}
-            className={cn('flex-1 text-[11px]', className)}
+            className={cn('w-full max-w-lg flex-1 text-[11px]', className)}
             loading={isLoading}
           >
             {!isLoading && <Sparkles className="mr-2 h-5 w-5" />}
-            <Trans>Share Signature Card</Trans>
+            <Trans>Share</Trans>
           </Button>
         )}
       </DialogTrigger>