fix: Added visibility message

lib/src/giphy_attachment.dart

@@ -41,9 +41,13 @@ class GiphyAttachment extends StatelessWidget {
   Widget _buildSendingAttachment(context) {
     final streamChannel = StreamChannel.of(context);
 
-    return Card(
+    return Column(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        Card(
           clipBehavior: Clip.antiAlias,
-      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8.0)),
+          shape:
+              RoundedRectangleBorder(borderRadius: BorderRadius.circular(8.0)),
           child: Column(
             mainAxisSize: MainAxisSize.min,
             crossAxisAlignment: CrossAxisAlignment.stretch,
@@ -193,8 +197,7 @@ class GiphyAttachment extends StatelessWidget {
                           'Cancel',
                           style: TextStyle(
                               fontWeight: FontWeight.bold,
-                        color: Colors.black.withOpacity(0.5)
+                              color: Colors.black.withOpacity(0.5)),
-                      ),
                         ),
                       ],
                     ),
@@ -225,6 +228,34 @@ class GiphyAttachment extends StatelessWidget {
               ),
             ],
           ),
+        ),
+        SizedBox(
+          height: 4.0,
+        ),
+        Align(
+          alignment: Alignment.centerRight,
+          child: Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 8.0),
+            child: Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Icon(
+                  StreamIcons.eye,
+                  color: Colors.black.withOpacity(0.5),
+                  size: 16.0,
+                ),
+                SizedBox(
+                  width: 4.0,
+                ),
+                Text(
+                  'Only visible to you',
+                  style: TextStyle(color: Colors.black.withOpacity(0.5)),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ],
     );
   }