fix link image size

lib/src/message_widget.dart

@@ -842,6 +842,8 @@ class _MessageWidgetState extends State<MessageWidget> {
   }
 
   void onLongPress(BuildContext context) {
+    print(
+        'widget.message.attachment[0].toJson(): ${widget.message.attachments[0].imageUrl}');
     if (widget.message.isEphemeral ||
         widget.message.status == MessageSendingStatus.SENDING) {
       return;

lib/src/url_attachment.dart

@@ -34,10 +34,10 @@ class UrlAttachment extends StatelessWidget {
               margin: EdgeInsets.symmetric(horizontal: 8.0),
               child: Stack(
                 children: [
-                  Center(
-                    child: CachedNetworkImage(
-                      imageUrl: urlAttachment.imageUrl,
-                    ),
+                  CachedNetworkImage(
+                    width: double.infinity,
+                    imageUrl: urlAttachment.imageUrl,
+                    fit: BoxFit.cover,
                   ),
                   Positioned(
                     left: 0.0,