diff --git a/server/server.js b/server/server.js
index fd7a3f7..e5db249 100644
--- a/server/server.js
+++ b/server/server.js
@@ -406,12 +406,13 @@ function handleAIResult(aiResult, roomId, username, originalText, attachments) {
   }
   if (aiResult.action === 'purchase') {
     // 引用最近图片：用户要求把之前的图片关联到某采购
+    let usedRecentImage = false;
     if (aiResult.use_recent_image) {
       const recentMsg = db.prepare("SELECT attachments FROM messages WHERE room_id = ? AND attachments IS NOT NULL AND attachments != '' ORDER BY timestamp DESC LIMIT 1").get(roomId);
       if (recentMsg) {
         try {
           const files = JSON.parse(recentMsg.attachments);
-          if (files.length) attachments = files;
+          if (files.length) { attachments = files; usedRecentImage = true; }
         } catch(e) {}
       }
     }
@@ -478,6 +479,12 @@ function handleAIResult(aiResult, roomId, username, originalText, attachments) {
     if (attachments?.length) {
       const insertAttach = db.prepare('INSERT INTO purchase_attachments (purchase_id, file_path, uploaded_by, timestamp) VALUES (?,?,?,?)');
       attachments.forEach(fp => insertAttach.run(purchase.id, fp, username, now));
+      if (usedRecentImage) {
+        replyText = `📎 已为「${aiResult.purchase_item}」关联 ${attachments.length} 个附件`;
+        db.prepare('INSERT INTO purchase_history (purchase_id, action, user, timestamp) VALUES (?,?,?,?)').run(purchase.id, `添加附件：${attachments.length} 个`, username, now);
+      }
+    } else if (usedRecentImage) {
+      replyText = `❌ 未找到最近的图片消息，请先发送图片再试。`;
     }
     storeAndBroadcastText(roomId, '小财', replyText);
     addToHistory(roomId, 'assistant', replyText);