💄 Optimize chat max width

lib/widgets/chat/chat_message.dart

@@ -251,11 +251,14 @@ class _ChatMessageText extends StatelessWidget {
                 buttonItems: items,
               );
             },
+            child: Container(
+              constraints: const BoxConstraints(maxWidth: 480),
               child: MarkdownTextContent(
                 content: data.body['text'],
                 isAutoWarp: true,
               ),
             ),
+          ),
           if (data.updatedAt != data.createdAt)
             Text(
               'messageEditedHint'.tr(),