fix: attachments ui

lib/src/message_input.dart

@@ -252,6 +252,10 @@ class MessageInputState extends State<MessageInput> {
       child: Center(
         child: LimitedBox(
           maxHeight: widget.maxHeight,
+          child: Container(
+            decoration: BoxDecoration(
+              borderRadius: BorderRadius.circular(8.0),
+            ),
             child: Column(
               mainAxisSize: MainAxisSize.min,
               children: [
@@ -344,6 +348,7 @@ class MessageInputState extends State<MessageInput> {
             ),
           ),
         ),
+      ),
     );
   }
 
@@ -592,8 +597,8 @@ class MessageInputState extends State<MessageInput> {
   }
 
   Widget _buildAttachments() {
-    return ListView(
+    return Wrap(
-      scrollDirection: Axis.horizontal,
+      direction: Axis.horizontal,
       children: _attachments
           .map(
             (attachment) => Padding(