diff --git a/components/chat.tsx b/components/chat.tsx
index def781d..845f42e 100644
--- a/components/chat.tsx
+++ b/components/chat.tsx
@@ -601,12 +601,14 @@ export function Chat({
             // 构造图片Markdown（使用与Gemini生成相同的格式）
             const imageMarkdown = `![thumb|||${result.original_url}|||2K](${result.thumbnail_url || result.original_url})`;
             
-            // 创建最终消息
+            // 创建最终消息（前端显示用）
             const finalMessage: ChatMessage = {
               id: messageId,
               role: "assistant",
               parts: [{ type: "text", text: imageMarkdown }],
-              createdAt: new Date().toISOString(),
+              metadata: {
+                createdAt: new Date().toISOString(),
+              },
             } as ChatMessage;
             
             // 更新消息