fix: remove prefix from followup hint, use raw text

server/src/assessment/graph/nodes/grader.node.ts

@@ -256,12 +256,7 @@ Format your response as JSON:
     if (shouldFollowUp && followupHints.length > 0) {
       let hint = followupHints[Math.min(currentFollowUpCount, followupHints.length - 1)];
       hint = hint.replace(/^如果.+?追问[：:]\s*/i, '').replace(/^[""「『]|[""」』]$/g, '');
-      const hintLabel = isZh
-        ? `让我帮你完善一下：${hint}`
-        : isJa
-          ? `もう少し詳しく伺います：${hint}`
-          : `Let me help you elaborate: ${hint}`;
-      followupHintMsg = new AIMessage(hintLabel);
+      followupHintMsg = new AIMessage(hint);
     }
 
     const feedbackMessage = new AIMessage(