more rounded avatars, fix metadata error

lib/controllers/message_controller.dart

@@ -133,6 +133,7 @@ class MessageController extends AsyncNotifier<Message?> {
           authorId: event.authorId,
           source: source,
           replyToMessageId: replyId,
+          metadata: metadata,
           text: asText.text,
           deliveredAt: config.event.timestamp,
           blurhash: (content["info"] as Map?)?["xyz.amorgan.blurhash"],

lib/widgets/avatar_or_hash.dart

@@ -40,7 +40,7 @@ class AvatarOrHash extends ConsumerWidget {
           smallSize: 12,
           backgroundColor: Theme.of(context).colorScheme.primary,
           child: ClipRRect(
-            borderRadius: BorderRadius.all(Radius.circular(4)),
+            borderRadius: BorderRadius.all(Radius.circular((height - 8) / 2.5)),
             child: SizedBox(
               width: height,
               height: height,

lib/widgets/chat_page/top_widget.dart

@@ -27,7 +27,7 @@ class TopWidget extends ConsumerWidget {
     if (replyMessage == null) return SizedBox.shrink();
 
     final smallerText =
-        message is TextMessage && replyMessage.metadata!["body"] != null
+        message is TextMessage && replyMessage.metadata?["body"] != null
         ? replyMessage.metadata!["body"].substring(
             0,
             min(