fix: Client crash on missing proper attachments.fields (RocketChat#37147)

Author: yash-rajpal

.changeset/chilled-pans-unite.md

@@ -0,0 +1,5 @@
+---
+'@rocket.chat/meteor': patch
+---
+
+Fixes client crash on invalid message attachment fields payload.

apps/meteor/client/components/message/content/attachments/DefaultAttachment.tsx

@@ -86,8 +86,12 @@ const DefaultAttachment = (attachment: DefaultAttachmentProps): ReactElement =>
 
 									return {
 										...rest,
-										title: <MarkdownText variant='inline' parseEmoji content={title.replace(/(.*)/g, (line: string) => `${line}  `)} />,
-										value: <MarkdownText variant='inline' parseEmoji content={value.replace(/(.*)/g, (line: string) => `${line}  `)} />,
+										title: title ? (
+											<MarkdownText variant='inline' parseEmoji content={title.replace(/(.*)/g, (line: string) => `${line}  `)} />
+										) : null,
+										value: value ? (
+											<MarkdownText variant='inline' parseEmoji content={value.replace(/(.*)/g, (line: string) => `${line}  `)} />
+										) : null,
 									};
 								})}
 							/>