fix(ai-chat): 修复历史记录加载、WebSocket长连接、服务端消息格式兼容

- 修复 WebSocket message_end 未收到问题：兼容 data.event === 'done' + data.data.conversation_id 嵌套格式
- 修复子组件 onShow/onUnload 不触发：移到页面 index.vue 的页面生命周期中
- 修复 loadHistoryIfNeeded 被重复 methods 块覆盖：合并到同一 methods 块
- 修复历史消息映射字段：msg.query → msg.content，添加 type:'text'
- 去掉所有有帮助/没帮助按钮
- CONVERSATION_KEY 改为统一导出常量
- WebSocket 长连接重构 + #ifdef 环境隔离

common/js/ai-service.js

@@ -3,7 +3,7 @@ import http from './http.js'
 import store from '@/store/index.js'
 
 let currentConversationId = null;
-const CONVERSATION_KEY = 'ai_conversation_id';
+export const CONVERSATION_KEY = 'ai_conversation_id';
 
 /**
  * 获取域名配置参数（避免重复代码）
@@ -111,16 +111,24 @@ function ensureWebSocketConnected() {
 
         if (data.event === 'message') {
           var text = data.answer || data.content || data.text || '';
+          // 兼容嵌套 data.data.content 格式
+          if (!text && data.data) {
+            text = data.data.content || data.data.answer || '';
+          }
           wsMessageContent += text;
           if (wsMessageOnChunk) wsMessageOnChunk(text);
-        } else if (data.event === 'message_end') {
-          var conversationId = data.conversation_id || '';
+        } else if (data.event === 'message_end' || data.event === 'done') {
+          // 兼容两种结束信号：message_end（流结束）或 done（服务端完成）
+          // 兼容两种数据层级：conversation_id 可能在顶层或 data.data 中
+          var conversationId = data.conversation_id || (data.data && data.data.conversation_id) || '';
+          console.log('[AI WS] 流结束信号, event:', data.event, 'type:', data.type, 'conversationId:', conversationId, '当前内存:', currentConversationId);
           // 保存会话ID（独立函数，不使用 this）
           if (conversationId) {
             if (conversationId !== currentConversationId) {
               currentConversationId = conversationId;
               try {
                 uni.setStorageSync(CONVERSATION_KEY, conversationId);
+                console.log('[AI WS] 会话ID已持久化到 storage:', conversationId);
               } catch (e) {
                 console.error('保存会话ID失败:', e);
               }
@@ -133,6 +141,9 @@ function ensureWebSocketConnected() {
           wsMessageContent = '';
           if (wsMessageOnComplete) wsMessageOnComplete({ content: content, conversation_id: convId });
           if (wsMessageResolve) wsMessageResolve({ content: content, conversation_id: convId });
+        } else {
+          // 兜底日志：打印所有未识别的消息类型
+          console.log('[AI WS] 未识别的消息:', JSON.stringify(data).substring(0, 200));
         }
       } catch (e) {
         console.error('WebSocket 消息解析失败:', e, '原始数据:', res.data);
@@ -507,6 +518,7 @@ export default {
       if (!params.conversation_id) {
         throw new Error('会话ID（conversation_id）是必填参数');
       }
+      console.log('[AI History] 请求历史, conversation_id:', params.conversation_id, 'limit:', params.limit);
       const requestData = {
         uniacid: params.uniacid || this.getUniacid(),
         conversation_id: params.conversation_id,

pages_tool/ai-chat/ai-chat-message.vue

@@ -426,7 +426,7 @@
   </view>
 </template>
 <script>
-import aiService from '@/common/js/ai-service.js'
+import aiService, { CONVERSATION_KEY } from '@/common/js/ai-service.js'
 import IMAGE_CONFIG from '@/common/js/image-config.js'
 
 export default {
@@ -544,31 +544,6 @@ export default {
       const hasEmoji = this.containsEmoji(this.inputText)
       return hasContent || hasEmoji
     }
-  },
-   onShow() {
-     // 如果不是 AI智能客服，立即退出并跳转
-     if (customerServiceType !== 'ai') {
-       uni.showToast({ title: '当前客服类型不支持此页面', icon: 'none' });
-       setTimeout(() => {
-         uni.navigateBack({ delta: 1 });
-       }, 1000);
-       return;
-     }
-     // 只在初次渲染或会话ID发生变化时才加载历史
-     const localConvId = this.getConversationIdFromLocal();
-     const shouldReload = this.currentConversationId !== localConvId;
-
-     if (localConvId && shouldReload) {
-       // 切换到已有的历史会话 → 重新加载历史
-       this.currentConversationId = localConvId;
-       aiService.setConversationId(localConvId);
-       this.loadChatHistoryIfExist();
-       // 注意: historyOffset 和 hasMoreHistory 在 loadChatHistoryIfExist() 内部设置
-     } else if (!localConvId && !this.currentConversationId) {
-       // 全新会话，初始化偏移量
-       this.historyOffset = this.messages.length;
-     }
-     // 会话未变化且已有消息 → 跳过加载，保留当前消息
   },
                // 新增：组件销毁时清除所有定时器
                beforeDestroy() {
@@ -589,6 +564,7 @@ export default {
       // 初始化用户昵称（缓存优先）
       this.initUserNicknameData()
   	this.currentConversationId = aiService.getConversationId();
+  	console.log('[AI Chat] created, currentConversationId:', this.currentConversationId, 'messages.length:', this.messages.length);
     },
      mounted() {
         // 初始加载时滚底（仅一次）
@@ -596,10 +572,6 @@ export default {
           this.scrollToBottom()
         })
       },
-    onUnload() {
-      // 页面销毁时断开 WebSocket 长连接
-      aiService.disconnectWebSocket();
-    },
   watch: {
       messages: {
         handler(newVal, oldVal) {
@@ -614,6 +586,31 @@ export default {
     }
   },
   methods: {
+    /**
+     * 供父页面调用的加载历史方法
+     * 在 page onShow 中通过 ref 调用
+     */
+    loadHistoryIfNeeded() {
+      const localConvId = this.getConversationIdFromLocal();
+      const shouldReload = this.currentConversationId !== localConvId;
+      console.log('[AI Chat] loadHistoryIfNeeded | localConvId:', localConvId, '| currentConvId:', this.currentConversationId, '| shouldReload:', shouldReload, '| messages.length:', this.messages.length, '| initialMessages.length:', this.initialMessages.length);
+
+      if (localConvId && shouldReload) {
+        console.log('[AI Chat] → 分支1: ID变化，加载历史');
+        this.currentConversationId = localConvId;
+        aiService.setConversationId(localConvId);
+        this.loadChatHistoryIfExist();
+      } else if (localConvId && !shouldReload && this.messages.length <= this.initialMessages.length) {
+        console.log('[AI Chat] → 分支2: ID不变但只有初始消息，从服务端恢复');
+        this.currentConversationId = localConvId;
+        this.loadChatHistoryIfExist();
+      } else if (!localConvId && !this.currentConversationId) {
+        console.log('[AI Chat] → 分支3: 全新会话');
+        this.historyOffset = this.messages.length;
+      } else {
+        console.log('[AI Chat] → 分支4: 跳过加载，保留当前消息, messages.length:', this.messages.length);
+      }
+    },
     // 生成消息的唯一 key（兼容非 H5 平台）
     getMessageKey(message, index) {
       const id = message.id || message.timestamp || index;
@@ -633,14 +630,14 @@ export default {
     // 【新增：会话 ID 本地缓存方法】
 	   saveConversationIdToLocal(convId) {
 	      if (convId) {
-	        uni.setStorageSync('dify_conversation_id', convId);
+	        uni.setStorageSync(CONVERSATION_KEY, convId);
 	      }
 	    },
 	    getConversationIdFromLocal() {
-	      return uni.getStorageSync('dify_conversation_id') || null;
+	      return uni.getStorageSync(CONVERSATION_KEY) || null;
 	    },
 	    clearConversationIdFromLocal() {
-	      uni.removeStorageSync('dify_conversation_id');
+	      uni.removeStorageSync(CONVERSATION_KEY);
 	    },
     // 初始化音频上下文
     initAudioContext() {
@@ -684,44 +681,47 @@ export default {
     //  新增：加载历史记录
 async loadChatHistoryIfExist() {
   const convId = aiService.getConversationId();
+  console.log('[AI Chat] loadChatHistoryIfExist 被调用, convId:', convId);
   if (convId) {
     try {
       // 调用正确的方法，并传入会话ID
+      console.log('[AI Chat] 请求历史 API...');
       const response = await aiService.getConversationHistory({ 
         conversation_id: convId 
       });
+      console.log('[AI Chat] 历史 API 返回:', JSON.stringify(response).substring(0, 200));
       
       if (!response.success || !Array.isArray(response.messages)) {
-        console.warn('历史记录为空或格式无效');
+        console.warn('[AI Chat] 历史记录为空或格式无效, success:', response.success, 'messages:', Array.isArray(response.messages));
         return;
       }
+      console.log('[AI Chat] 原始消息数:', response.messages.length, 'total:', response.total);
       // 需要根据实际返回的 response.data.messages 来映射
       this.messages = response.messages.map(msg => {
         let content = '';
         if (msg.role === 'user') {
-          content = msg.query || (typeof msg.inputs === 'string' ? msg.inputs : JSON.stringify(msg.inputs || '')) || '';
+          content = msg.query || msg.content || (typeof msg.inputs === 'string' ? msg.inputs : JSON.stringify(msg.inputs || '')) || '';
         } else {
-          content = msg.answer || '';
+          content = msg.answer || msg.content || '';
         }
         // 只使用后端返回的真实时间，不使用假时间
         const realTimestamp = msg.created_at || msg.create_time || msg.time;
         return {
           id: msg.message_id || (Date.now() + Math.random() * 10000),
           role: msg.role === 'user' ? 'user' : 'ai',
+          type: 'text',
           content: content,
           timestamp: realTimestamp,
-          actions: msg.role !== 'user' ? [
-            { id: 1, text: '有帮助', type: 'like' },
-            { id: 2, text: '没帮助', type: 'dislike' }
-          ] : []
+          actions: []
         };
       }).filter(msg => msg.content.trim() !== ''); // 过滤掉内容为空的消息
+      console.log('[AI Chat] 过滤后消息数:', this.messages.length, '内容摘要:', this.messages.map(m => ({role: m.role, content: m.content.substring(0, 30)})));
       // 根据服务端 total 判断是否还有更多历史可加载
       const msgCount = this.messages.length;
       this.hasMoreHistory = response.total > msgCount;
       this.historyOffset = msgCount;
     } catch (error) {
-      console.error('加载历史记录失败:', error);
+      console.error('[AI Chat] 加载历史记录失败:', error.message, error.stack);
       // 只需调用服务层的清除方法，它会处理本地存储
       aiService.clearConversationId();
       this.currentConversationId = null;
@@ -1003,10 +1003,7 @@ async loadChatHistoryIfExist() {
         timestamp: Date.now(),
         conversationId: response.conversationId,
         messageId: response.messageId,
-        actions: [
-          { id: 1, text: '有帮助', type: 'like' },
-          { id: 2, text: '没帮助', type: 'dislike' }
-        ]
+        actions: []
       }
       this.shouldScrollToBottom = true
       this.messages.push(aiMessage)
@@ -1144,10 +1141,7 @@ _finishStream(msg, result) {
     }
   }
 
-  msg.actions = [
-    { id: 1, text: '有帮助', type: 'like' },
-    { id: 2, text: '没帮助', type: 'dislike' }
-  ]
+  msg.actions = []
 
   this.$nextTick(() => this.scrollToBottom())
   this.$emit('ai-response', msg)

pages_tool/ai-chat/index.vue

@@ -76,6 +76,7 @@ import navigationHelper from '@/common/js/navigation';
 import { EventSafety } from '@/common/js/event-safety';
 import aiChatMessage from './ai-chat-message.vue';
 import IMAGE_CONFIG from '@/common/js/image-config.js';
+import aiService from '@/common/js/ai-service.js';
 
 export default {
   components: {
@@ -146,6 +147,7 @@ export default {
   },
 
   onShow() {
+    console.log('[AI Chat Page] onShow 触发');
     // 监听键盘高度变化
     uni.onKeyboardHeightChange((res) => {
       this.keyboardHeight = res.height;
@@ -153,6 +155,10 @@ export default {
         this.$refs.chat.updateKeyboardHeight(res.height);
       }
     });
+    // 每次页面显示时尝试加载历史记录
+    if (this.$refs.chat && this.$refs.chat.loadHistoryIfNeeded) {
+      this.$refs.chat.loadHistoryIfNeeded();
+    }
   },
 
   onHide() {
@@ -165,7 +171,9 @@ export default {
   },
   
   onUnload() {
+    console.log('[AI Chat Page] onUnload 触发');
     this.cleanup();
+    aiService.disconnectWebSocket();
   },
 
   methods: {