diff --git a/pages_tool/ai-chat/ai-chat-message.vue b/pages_tool/ai-chat/ai-chat-message.vue
index edcf3a8..4978f1b 100644
--- a/pages_tool/ai-chat/ai-chat-message.vue
+++ b/pages_tool/ai-chat/ai-chat-message.vue
@@ -10,8 +10,7 @@
       </view>
 
       <!-- 消息列表 -->
-      <view v-for="(message, index) in messages" :key="`msg-${message.id || message.timestamp}-${index}`"
-        class="message-item" :class="[message.role, { 'first-message': index === 0 }]">
+      <view v-for="item in messagesWithKey" :key="item.__renderKey" class="message-item" :class="[item.role, { 'first-message': item.__index === 0 }]">
 
         <!-- 用户消息 -->
         <view v-if="message.role === 'user'" class="user-message">
@@ -392,6 +391,19 @@ export default {
       isFetchingHistory: false
     }
   },
+  computed: {
+    // 为每条消息生成兼容小程序的唯一 key
+    messagesWithKey() {
+      return this.messages.map((msg, idx) => {
+        const uniqueId = msg.id || msg.timestamp || idx;
+        return {
+          ...msg,
+          __renderKey: `msg_${uniqueId}_${idx}`,
+          __index: idx  // 保留原始索引，用于判断 first-message 等
+        };
+      });
+    }
+  },
   onShow() {
     // 优先读取本地缓存的会话 ID
     const localConvId = this.getConversationIdFromLocal();