🪟 fix: Update Link Target to Open in Separate Tabs (#11669)

`_new` is not a recognized keyword for the `target` attribute. While
browsers treat it as a named window, `_blank` is the standard value
for opening links in a new tab/window.

client/src/components/Chat/Messages/Content/MarkdownComponents.tsx

@@ -111,7 +111,7 @@ export const a: React.ElementType = memo(({ href, children }: TAnchorProps) => {
   }, [user?.id, href]);
 
   const { refetch: downloadFile } = useFileDownload(user?.id ?? '', file_id);
-  const props: { target?: string; onClick?: React.MouseEventHandler } = { target: '_new' };
+  const props: { target?: string; onClick?: React.MouseEventHandler } = { target: '_blank' };
 
   if (!file_id || !filename) {
     return (

client/src/components/Chat/Messages/Content/MarkdownLite.tsx

@@ -38,7 +38,6 @@ const MarkdownLite = memo(
               ]}
               /** @ts-ignore */
               rehypePlugins={rehypePlugins}
-              // linkTarget="_new"
               components={
                 {
                   code: codeExecution ? code : codeNoExecution,