fix: inject episodic memory into WeChat agent

wechat-mp.mjs

@@ -235,7 +235,7 @@ async function executeSessionReply(
   requestId,
   prompt,
   metadata = {},
-  { submitReply = null } = {},
+  { submitReply = null, prepareUserMessage = null } = {},
 ) {
   const eventsResponse = await apiFetch(`/sessions/${sessionId}/events`, {
     method: 'GET',
@@ -246,7 +246,10 @@ async function executeSessionReply(
     throw new Error(text || '无法建立公众号消息事件流');
   }
 
-  const userMessage = createUserMessage(prompt, metadata);
+  let userMessage = createUserMessage(prompt, metadata);
+  if (prepareUserMessage) {
+    userMessage = (await prepareUserMessage(userMessage)) ?? userMessage;
+  }
   if (submitReply) {
     await submitReply({ sessionId, requestId, userMessage });
   } else {
@@ -1504,6 +1507,7 @@ export function createWechatMpService({
   scheduleService = null,
   wechatScheduleLlmConfigService = null,
   llmProviderService = null,
+  chatIntentRouter = null,
   onPageGenerated = null,
   applySessionLlmProvider = null,
   refreshSessionSnapshot = null,
@@ -2232,6 +2236,49 @@ export function createWechatMpService({
     }
   };
 
+  const prepareWechatAgentUserMessage = async ({ userId, sessionId, userMessage }) => {
+    if (
+      !chatIntentRouter?.resolveAgentMemoryContext
+      || !chatIntentRouter?.applyAgentOrchestration
+    ) {
+      return userMessage;
+    }
+    const displayText = String(
+      userMessage?.metadata?.displayText
+        ?? messageVisibleText(userMessage),
+    ).trim();
+    try {
+      const memoryContext = await chatIntentRouter.resolveAgentMemoryContext({
+        userId,
+        sessionId,
+        text: displayText,
+        forceDeepReasoning: false,
+      });
+      if (
+        !memoryContext?.injectionEnabled
+        || !Array.isArray(memoryContext.memories)
+        || memoryContext.memories.length === 0
+      ) {
+        return userMessage;
+      }
+      return chatIntentRouter.applyAgentOrchestration(
+        userMessage,
+        {
+          route: 'agent_orchestration',
+          reason: '微信服务号消息由 Agent 处理',
+          source: 'wechat_mp',
+        },
+        { memoryContext },
+      );
+    } catch (err) {
+      logger.warn?.(
+        'WeChat MP agent memory resolve skipped:',
+        err instanceof Error ? err.message : err,
+      );
+      return userMessage;
+    }
+  };
+
   const runIntentMessage = async ({ inbound, intent, user }) => {
     const wechatIntent = classifyWechatIntent(intent);
     const mediaAnalysisEnabled = isWechatMediaGrayUser(user, config.mediaAnalysisGrayUsers);
@@ -2294,6 +2341,11 @@ export function createWechatMpService({
         agentPrompt,
         buildIntentMetadata(intent, { mediaAnalysisEnabled, imagePolicy }),
         {
+          prepareUserMessage: (userMessage) => prepareWechatAgentUserMessage({
+            userId: user.userId,
+            sessionId,
+            userMessage,
+          }),
           submitReply: submitSessionReply
             ? ({ requestId: replyRequestId, userMessage }) =>
                 submitSessionReply({
@@ -2496,6 +2548,11 @@ export function createWechatMpService({
           retryPrompt,
           buildIntentMetadata(intent, { mediaAnalysisEnabled, imagePolicy }),
           {
+            prepareUserMessage: (userMessage) => prepareWechatAgentUserMessage({
+              userId: user.userId,
+              sessionId,
+              userMessage,
+            }),
             submitReply: submitSessionReply
               ? ({ requestId: replyRequestId, userMessage }) =>
                   submitSessionReply({