fix(citations): only render CitationLink badges for AI messages

Human messages should display links as plain underlined text,
not as citation badges. This preserves the original user input
appearance when users paste URLs in their messages.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/workspace/messages/message-list-item.tsx

@@ -77,24 +77,40 @@ export function MessageListItem({
 
 /**
  * Custom link component that handles citations and external links
- * All external links (http/https) are rendered as CitationLink badges
- * to ensure consistent styling during streaming
+ * For AI messages: external links (http/https) are rendered as CitationLink badges
+ * For human messages: links are rendered as plain text/links
  */
 function MessageLink({
   href,
   children,
   citationMap,
+  isHuman,
 }: React.AnchorHTMLAttributes<HTMLAnchorElement> & {
   citationMap: Map<string, Citation>;
+  isHuman: boolean;
 }) {
   if (!href) return <span>{children}</span>;
 
+  // Human messages: render links as plain underlined text
+  if (isHuman) {
+    return (
+      <a
+        href={href}
+        target="_blank"
+        rel="noopener noreferrer"
+        className="text-primary underline underline-offset-2 hover:no-underline"
+      >
+        {children}
+      </a>
+    );
+  }
+
   const citation = citationMap.get(href);
   
   // Check if it's an external link (http/https)
   const isExternalLink = href.startsWith("http://") || href.startsWith("https://");
   
-  // All external links use CitationLink for consistent styling during streaming
+  // AI messages: external links use CitationLink for consistent styling during streaming
   if (isExternalLink) {
     return (
       <CitationLink citation={citation} href={href}>
@@ -198,7 +214,7 @@ function MessageContent_({
   // Shared markdown components
   const markdownComponents = useMemo(() => ({
     a: (props: React.AnchorHTMLAttributes<HTMLAnchorElement>) => (
-      <MessageLink {...props} citationMap={citationMap} />
+      <MessageLink {...props} citationMap={citationMap} isHuman={isHuman} />
     ),
     img: (props: React.ImgHTMLAttributes<HTMLImageElement>) => (
       <MessageImage {...props} threadId={thread_id} maxWidth={isHuman ? "full" : "90%"} />