Fix stale references shown while streaming and empty final reply in Go mode (#17146)

web/src/pages/next-chats/utils.ts

@@ -40,9 +40,20 @@ export const buildMessageItemReference = (
   const referenceIndex = assistantMessages.findIndex(
     (x) => x.id === message.id,
   );
+  // An assistant message that has not received any content yet is still
+  // being generated. Never resolve its reference from the conversation
+  // reference list — the indices only align with completed answers, so the
+  // lookup would surface a stale reference from a previous turn (or from a
+  // previously opened conversation) while the answer is streaming.
+  const isPendingAnswer =
+    message.role === MessageType.Assistant &&
+    !message.content &&
+    isEmpty(message?.reference);
   const reference = !isEmpty(message?.reference)
     ? message?.reference
-    : (conversation?.reference ?? [])[referenceIndex];
+    : isPendingAnswer
+      ? undefined
+      : (conversation?.reference ?? [])[referenceIndex];
 
   return reference ?? { doc_aggs: [], chunks: [], total: 0 };
 };