feat(wechat): add admin-pluggable LLM intent router separate from H5.

Give WeChat MP its own chat.general→page.generate LLM refinement layer with memindadm toggles, shadow mode, and canary openids so service account routing stays independent of the H5 chatIntentRouter.

Co-authored-by: Cursor <cursoragent@cursor.com>

wechat-mp.mjs

@@ -1487,6 +1487,7 @@ export function createWechatMpService({
   wechatScheduleLlmConfigService = null,
   llmProviderService = null,
   chatIntentRouter = null,
+  wechatIntentRouter = null,
   systemDisclosurePolicyService = null,
   onPageGenerated = null,
   applySessionLlmProvider = null,
@@ -2433,7 +2434,7 @@ export function createWechatMpService({
   };
 
   const runIntentMessage = async ({ inbound, intent, user }) => {
-    const wechatIntent = await resolveWechatIntent(intent);
+    const wechatIntent = await resolveWechatIntent(intent, { openid: inbound.fromUserName });
     const mediaAnalysisEnabled = isWechatMediaGrayUser(user, config.mediaAnalysisGrayUsers);
     const reliabilityEnabled = isWechatMediaGrayUser(user, config.reliabilityGrayUsers);
     const agentReplyTimeoutMs = reliabilityEnabled ? config.agentReplyTimeoutMs : 0;
@@ -3066,7 +3067,7 @@ export function createWechatMpService({
     }
   };
 
-  const resolveWechatIntent = async (intent) => {
+  const resolveWechatIntent = async (intent, { openid = null } = {}) => {
     const wechatIntent = classifyWechatIntent(intent);
     if (intent.msgType !== 'text' && intent.msgType !== 'voice') return wechatIntent;
     const sessionActionResult = await resolveWechatSessionAction(intent.agentText, {
@@ -3080,7 +3081,26 @@ export function createWechatMpService({
     if (sessionActionResult.action === 'ignore_previous') {
       intent.sessionAction = sessionActionResult.action;
     }
-    return { ...wechatIntent, sessionActionResult };
+    const withSession = {
+      ...wechatIntent,
+      sessionActionResult,
+    };
+    if (!wechatIntentRouter?.refineIntent) {
+      return withSession;
+    }
+    try {
+      return await wechatIntentRouter.refineIntent({
+        ruleIntent: withSession,
+        text: intent.agentText,
+        openid,
+      });
+    } catch (err) {
+      logger.warn?.(
+        'WeChat MP intent router refine skipped:',
+        err instanceof Error ? err.message : err,
+      );
+      return withSession;
+    }
   };
 
   const handleInboundMessage = async (bodyText, query = {}) => {