Add smart ACK provider for WeChat MP replies

Replace fixed ackText with a rule-based AckProvider that picks
response templates by message type and intent (translate, summary,
rewrite, poster, ppt, mindmap, code, search, schedule). Pure sync,
zero I/O, auto-falls back to config.ackText on any error.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

admin-routes.mjs

@@ -11,6 +11,7 @@
 //   createOpsApi    -> /api/ops/v1/*     plaza operations console (ops_role)
 import express from 'express';
 import { sendData, sendError } from './api-response.mjs';
+import { PLAN_CATALOG, tokensToCallsApprox } from './billing-subscription.mjs';
 import { hasOpsRole } from './plaza-ops.mjs';
 import { mapPlazaError } from './plaza-posts.mjs';
 
@@ -42,6 +43,7 @@ export function createAdminApi({
   plazaPosts,
   plazaOps,
   wechatAdmin,
+  subscriptionService,
 }) {
   function requireAdmin(req, res, next) {
     if (!req.currentUser || req.currentUser.role !== 'admin') {
@@ -272,6 +274,44 @@ export function createAdminApi({
     res.json(await wechatAdmin.listDeliveries(req.query));
   });
 
+  adminApi.get('/wechat/balance-alerts', requireAdmin, async (req, res) => {
+    if (!wechatAdmin) return res.status(503).json({ message: '服务号管理未启用' });
+    res.json(await wechatAdmin.listBalanceAlerts(req.query));
+  });
+
+  adminApi.post('/wechat/balance-alerts', requireAdmin, async (req, res) => {
+    if (!wechatAdmin) return res.status(503).json({ message: '服务号管理未启用' });
+    const result = await wechatAdmin.createBalanceAlert(req.body ?? {});
+    if (!result.ok) return res.status(400).json({ message: result.message });
+    res.status(201).json(result);
+  });
+
+  adminApi.post('/wechat/balance-alerts/:id/cancel', requireAdmin, async (req, res) => {
+    if (!wechatAdmin) return res.status(503).json({ message: '服务号管理未启用' });
+    const result = await wechatAdmin.cancelBalanceAlert(req.params.id);
+    if (!result.ok) return res.status(404).json({ message: result.message ?? '取消失败' });
+    res.json(result);
+  });
+
+  adminApi.post('/wechat/balance-alerts/:id/resume', requireAdmin, async (req, res) => {
+    if (!wechatAdmin) return res.status(503).json({ message: '服务号管理未启用' });
+    const result = await wechatAdmin.resumeBalanceAlert(req.params.id);
+    if (!result.ok) return res.status(404).json({ message: result.message ?? '恢复失败' });
+    res.json(result);
+  });
+
+  adminApi.get('/wechat/web-notifications', requireAdmin, async (req, res) => {
+    if (!wechatAdmin) return res.status(503).json({ message: '服务号管理未启用' });
+    res.json(await wechatAdmin.listWebNotifications(req.query));
+  });
+
+  adminApi.post('/wechat/web-notifications', requireAdmin, async (req, res) => {
+    if (!wechatAdmin) return res.status(503).json({ message: '服务号管理未启用' });
+    const result = await wechatAdmin.createWebNotification(req.body ?? {});
+    if (!result.ok) return res.status(400).json({ message: result.message });
+    res.status(201).json(result);
+  });
+
   adminApi.post('/wechat/users/:userId/route/clear', requireAdmin, async (req, res) => {
     if (!wechatAdmin) return res.status(503).json({ message: '服务号管理未启用' });
     const result = await wechatAdmin.clearRouteForUser(req.params.userId);
@@ -407,6 +447,61 @@ export function createAdminApi({
     }
   });
 
+  // ── Subscription management ───────────────────────────────────────────────
+
+  adminApi.get('/subscriptions', requireAdmin, async (req, res) => {
+    if (!subscriptionService) return res.status(503).json({ message: '订阅服务未启用' });
+    const { userId, status, page, pageSize } = req.query;
+    const result = await subscriptionService.listSubscriptions({ userId, status, page, pageSize });
+    res.json(result);
+  });
+
+  adminApi.get('/subscriptions/plans', requireAdmin, (_req, res) => {
+    res.json(
+      Object.entries(PLAN_CATALOG).map(([planType, def]) => ({
+        planType,
+        ...def,
+        approxCalls: tokensToCallsApprox(def.periodTokens),
+      })),
+    );
+  });
+
+  adminApi.get('/users/:userId/subscription', requireAdmin, async (req, res) => {
+    if (!subscriptionService) return res.status(503).json({ message: '订阅服务未启用' });
+    const sub = await subscriptionService.getActiveSubscription(req.params.userId);
+    res.json({ subscription: sub });
+  });
+
+  adminApi.post('/users/:userId/subscription', requireAdmin, async (req, res) => {
+    if (!subscriptionService) return res.status(503).json({ message: '订阅服务未启用' });
+    const { planType, durationDays, note } = req.body ?? {};
+    if (!planType) return res.status(400).json({ message: '缺少 planType' });
+    const result = await subscriptionService.grantSubscription(
+      req.params.userId,
+      planType,
+      durationDays ? Number(durationDays) : undefined,
+      req.currentUser.id,
+      note,
+    );
+    if (!result.ok) return res.status(400).json({ message: result.message });
+    res.json(result);
+  });
+
+  adminApi.delete('/users/:userId/subscription', requireAdmin, async (req, res) => {
+    if (!subscriptionService) return res.status(503).json({ message: '订阅服务未启用' });
+    const result = await subscriptionService.cancelSubscription(
+      req.params.userId,
+      req.currentUser.id,
+    );
+    res.json(result);
+  });
+
+  adminApi.post('/subscriptions/expire-stale', requireAdmin, async (_req, res) => {
+    if (!subscriptionService) return res.status(503).json({ message: '订阅服务未启用' });
+    const count = await subscriptionService.expireStaleSubscriptions();
+    res.json({ expiredCount: count });
+  });
+
   return adminApi;
 }