fix(citations): parse citations in reasoning content

When only reasoning content exists (no main content), the citations
block was not being parsed and removed. Now reasoning content also
goes through parseCitations to hide the raw citations block.

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

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

@@ -165,10 +165,12 @@ function MessageContent_({
       const reasoningContent = extractReasoningContentFromMessage(message);
       const rawContent = extractContentFromMessage(message);
 
+      // When only reasoning content exists (no main content), also parse citations
       if (!isLoading && reasoningContent && !rawContent) {
+        const { citations, cleanContent } = parseCitations(reasoningContent);
         return {
-          citations: [],
-          cleanContent: reasoningContent,
+          citations,
+          cleanContent,
           uploadedFiles: [],
           isLoadingCitations: false,
         };