diff --git a/README.md b/README.md
index 9b95676c..724a5da0 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@
 - `apps/api` 独立业务 API，后续供 H5、Taro 小程序、管理后台统一调用；已支持 Supabase Auth JWT 和迁移期 `tk_` session 双入口。
 - 租户后台能力：品牌、域名、公开设置、支付账户、登录配置、私密密钥掩码、活动内容、考试日期、题目反馈处理、激活码、优惠券、成员权限、自定义角色模板、班级/教师/学生范围权限、学生批量导入、批量分班、学生备注、跟进任务、审计日志。
 - 租户内容能力：可配置题库入口、任意深度分类树、考试意向标记、题目集合、顺序/随机/全真模拟蓝图、题目录入/更新、视频绑定、分数线、单词、知识手册、资料资源台账、题目/单词/知识手册 JSON 批量导入。
-- 学生端能力：题库入口、分类树、题目集合、顺序/随机/模考 session 组卷快照、答题、错题本、收藏夹、背单词进度、个人中心、考试倒计时、签到积分、题目反馈、排行榜、分数线、题目视频、订单、权益、激活码兑换、资料下载。
+- 学生端能力：题库入口、分类树、题目集合、顺序/随机/模考 session 组卷快照、答题、错题本、收藏夹、背单词进度、个人中心、考试倒计时、签到积分、题目反馈、排行榜、分数线、题目视频、订单详情/状态轮询、优惠券领取/抵扣、权益、激活码预检查/兑换、资料下载。
 - 平台后台能力：租户管理、SaaS 套餐、订阅、账单、服务费收款、用量记录。
 - 销售/代理/CRM 增长链路：邀请码、扫码/分享事件、首绑客资保护、销售统计、团队关系、CRM 配置和队列。
 - PocketBase schema/数据导入器雏形和导入后校验脚本。
@@ -23,7 +23,7 @@
 还没有达到生产交付的部分：
 
 - Supabase Auth/JWT、租户角色模板、班级/教师/学生范围权限已可联调；生产前还要做真实云端 Auth/JWKS 回归和 RLS 深测。
-- 阿里云/腾讯云短信、微信小程序登录、微信支付、支付宝主链路已完成本地适配；微信网页登录、QQ 登录、手机号换绑、退款/对账和真实生产账号联调还没接完。
+- 阿里云/腾讯云短信、微信小程序登录、微信支付、支付宝主链路已完成本地适配；微信网页登录、QQ 登录、手机号换绑、退款/对账、支付补偿和真实生产账号联调还没接完。
 - OSS/COS/Supabase Storage 上传下载签名 provider 已接入；上传后校验、PDF 预览、防盗链和视频水印还没完成。
 - Excel/CSV 导入、分数线/视频批量导入和异步 worker 还没完成。
 - Taro 跨端前端还没开始 scaffold。
@@ -130,7 +130,7 @@ npm run test:api
 apps/api/src/features/
   auth/              短信登录、迁移期 session、OAuth 占位
   catalog/           学生端目录、内容入口、分类树、题目集合、资料、商城只读接口
-  commerce/          订单、支付确认、激活码、权益
+  commerce/          订单、支付确认、激活码、优惠券、权益
   health/            健康检查
   learning/          练习 session 组卷、答题、错题、收藏、学习进度、排行榜
   platform-admin/    平台方租户、SaaS 套餐、订阅、账单、用量
@@ -178,4 +178,4 @@ npm run check:refactor
 2. Taro 前端 scaffold，让 H5 和小程序共用同一套 API。
 3. 对象存储上传后校验、PDF 预览、防盗链和视频水印。
 4. Excel/CSV 以及分数线、视频批量导入；把现有 JSON 导入升级为可排队异步执行。
-5. 微信网页/QQ 登录、退款对账、CRM worker、公共题库授权、租户采纳、订单状态轮询、激活码预检查、积分活动深化，以及排行榜防刷/预聚合。
+5. 微信网页/QQ 登录、退款对账、支付补偿、CRM worker、公共题库授权、租户采纳、积分活动深化，以及排行榜防刷/预聚合。
diff --git a/apps/api/src/features/commerce/index.ts b/apps/api/src/features/commerce/index.ts
index 85484a23..a544c301 100644
--- a/apps/api/src/features/commerce/index.ts
+++ b/apps/api/src/features/commerce/index.ts
@@ -1,10 +1,14 @@
 import type { RouteDefinition } from '../../core/router.js';
 import {
+  checkActivationCodeRoute,
+  claimCouponRoute,
   confirmManualPaymentRoute,
   createPaymentRoute,
   createOrderRoute,
   entitlementCheckRoute,
   entitlementsRoute,
+  orderDetailRoute,
+  orderStatusRoute,
   ordersRoute,
   paymentNotifyRoute,
   redeemActivationCodeRoute,
@@ -13,6 +17,8 @@ import {
 export const commerceRoutes: RouteDefinition[] = [
   ['POST', '/api/commerce/orders', createOrderRoute],
   ['GET', '/api/commerce/orders', ordersRoute],
+  ['GET', '/api/commerce/orders/detail', orderDetailRoute],
+  ['GET', '/api/commerce/orders/status', orderStatusRoute],
   ['GET', '/api/commerce/entitlements', entitlementsRoute],
   ['GET', '/api/commerce/entitlements/check', entitlementCheckRoute],
   ['POST', '/api/commerce/payments/create', createPaymentRoute],
@@ -20,5 +26,7 @@ export const commerceRoutes: RouteDefinition[] = [
   ['POST', '/api/commerce/payments/notify/wechat_pay', paymentNotifyRoute],
   ['POST', '/api/commerce/payments/notify/wechat-pay', paymentNotifyRoute],
   ['POST', '/api/commerce/payments/notify/alipay', paymentNotifyRoute],
+  ['POST', '/api/commerce/activation-codes/check', checkActivationCodeRoute],
   ['POST', '/api/commerce/activation-codes/redeem', redeemActivationCodeRoute],
+  ['POST', '/api/commerce/coupons/claim', claimCouponRoute],
 ];
diff --git a/apps/api/src/features/commerce/routes.ts b/apps/api/src/features/commerce/routes.ts
index 2e5b6bbe..140ed60c 100644
--- a/apps/api/src/features/commerce/routes.ts
+++ b/apps/api/src/features/commerce/routes.ts
@@ -1,3 +1,4 @@
+import type pg from 'pg';
 import { getHeader, HttpError, type RequestContext } from '../../core/http.js';
 import {
   intParam,
@@ -5,6 +6,7 @@ import {
   optionalString,
   readJsonBody,
   requiredString,
+  stringParam,
   tenantIdFrom,
   userIdFrom,
 } from '../../core/request.js';
@@ -17,13 +19,16 @@ import {
   type PaymentProviderName,
 } from './providers.js';
 import { loadTenantPaymentProviderConfig } from '../../core/tenant-provider-config.js';
+import { requireTenantAdmin, requireTenantPermission } from '../tenant-admin/auth.js';
 
 interface PlanRow {
   id: string;
   name: string;
   price_cents: number;
+  original_price_cents: number | null;
   days: number;
   region_id: string | null;
+  coupon_only: boolean;
 }
 
 interface OrderRow {
@@ -55,6 +60,56 @@ interface PaymentOrderRow {
   region_id: string | null;
 }
 
+interface OrderDetailRow {
+  id: string;
+  orderNo: string;
+  status: string;
+  productType: string | null;
+  productName: string | null;
+  amountCents: number;
+  payMethod: string | null;
+  payProvider: string | null;
+  tradeNo: string | null;
+  planId: string | null;
+  days: number | null;
+  userId: string | null;
+  regionId: string | null;
+  paidAt: string | null;
+  rawPayload: Record<string, unknown>;
+  createdAt: string;
+  updatedAt: string;
+}
+
+interface CouponRow {
+  id: string;
+  code: string;
+  plan_id: string | null;
+  discount_type: 'percent' | 'fixed' | null;
+  discount_value: string | number | null;
+  valid_from: string | null;
+  valid_to: string | null;
+  max_uses: number | null;
+  used_count: number;
+  source: string | null;
+  remark: string | null;
+}
+
+interface CouponRedemptionRow {
+  id: string;
+  coupon_id: string | null;
+  coupon_code: string | null;
+  user_id: string | null;
+  plan_id: string | null;
+  order_id: string | null;
+  status: string;
+  discount_applied_cents: number | null;
+  region_id: string | null;
+  source: string | null;
+  remark: string | null;
+  claimed_at: string | null;
+  used_at: string | null;
+}
+
 interface EntitlementRow {
   id: string;
   entitlementType: string;
@@ -69,6 +124,229 @@ interface EntitlementRow {
   createdAt: string;
 }
 
+function normalizeCode(value: string) {
+  return value.trim().replace(/\s+/g, '').toUpperCase();
+}
+
+function formatPrice(amountCents: number) {
+  return Number((Math.max(0, amountCents) / 100).toFixed(2));
+}
+
+function safeDiscountValue(value: string | number | null) {
+  const parsed = Number(value ?? 0);
+  return Number.isFinite(parsed) ? parsed : 0;
+}
+
+function calculateCouponDiscount(coupon: CouponRow, baseAmountCents: number) {
+  const amount = Math.max(0, Math.trunc(baseAmountCents));
+  if (!coupon.discount_type || coupon.discount_value === null || coupon.discount_value === undefined) return 0;
+  if (coupon.discount_type === 'fixed') {
+    return Math.min(amount, Math.max(0, Math.round(safeDiscountValue(coupon.discount_value))));
+  }
+  const percent = Math.max(0, Math.min(100, safeDiscountValue(coupon.discount_value)));
+  return Math.min(amount, Math.floor((amount * percent) / 100));
+}
+
+function calculatePlanDays(planDays: number, quantity: number) {
+  const days = Math.trunc(planDays || 0);
+  if (days < 0) return -1;
+  return Math.max(0, days * quantity);
+}
+
+function couponValidity(coupon: CouponRow, now = new Date()) {
+  if (coupon.valid_from && now < new Date(coupon.valid_from)) {
+    return { valid: false, code: 'COUPON_NOT_STARTED', message: 'Coupon is not active yet' };
+  }
+  if (coupon.valid_to && now > new Date(coupon.valid_to)) {
+    return { valid: false, code: 'COUPON_EXPIRED', message: 'Coupon has expired' };
+  }
+  if (coupon.max_uses !== null && coupon.max_uses !== undefined && coupon.max_uses > 0 && coupon.used_count >= coupon.max_uses) {
+    return { valid: false, code: 'COUPON_QUOTA_EXHAUSTED', message: 'Coupon quota has been exhausted' };
+  }
+  return { valid: true, code: '', message: '' };
+}
+
+function couponPayload(coupon: CouponRow, plan: PlanRow, redemption: CouponRedemptionRow | null, discountCents: number) {
+  return {
+    code: coupon.code,
+    discountType: coupon.discount_type,
+    discountValue: coupon.discount_value === null || coupon.discount_value === undefined ? null : Number(coupon.discount_value),
+    discountCents,
+    source: coupon.source,
+    remark: coupon.remark,
+    redemptionId: redemption?.id || null,
+    redemptionStatus: redemption?.status || null,
+    plan: {
+      id: plan.id,
+      name: plan.name,
+      priceCents: plan.price_cents,
+      price: formatPrice(plan.price_cents),
+      originalPriceCents: plan.original_price_cents,
+      originalPrice: plan.original_price_cents === null ? null : formatPrice(plan.original_price_cents),
+      days: plan.days,
+      regionId: plan.region_id,
+      couponOnly: plan.coupon_only,
+    },
+  };
+}
+
+async function loadPlan(client: pg.PoolClient | null, tenantId: string, planId: string, lock = false) {
+  const sql = `
+    select id, name, price_cents, original_price_cents, days, region_id, coupon_only
+    from public.svip_plans
+    where tenant_id = $1 and id = $2 and is_active = true
+    limit 1
+    ${lock ? 'for update' : ''}
+  `;
+  if (client) {
+    const result = await client.query<PlanRow>(sql, [tenantId, planId]);
+    return result.rows[0] || null;
+  }
+  return queryOne<PlanRow>(sql, [tenantId, planId]);
+}
+
+async function findCouponByCode(client: pg.PoolClient, tenantId: string, code: string, lock = false) {
+  const result = await client.query<CouponRow>(
+    `
+    select id, code::text as code, plan_id, discount_type, discount_value,
+           valid_from, valid_to, max_uses, used_count, source, remark
+    from public.coupons
+    where tenant_id = $1 and lower(code::text) = lower($2)
+    limit 1
+    ${lock ? 'for update' : ''}
+    `,
+    [tenantId, normalizeCode(code)],
+  );
+  return result.rows[0] || null;
+}
+
+async function findCouponById(client: pg.PoolClient, tenantId: string, couponId: string, lock = false) {
+  const result = await client.query<CouponRow>(
+    `
+    select id, code::text as code, plan_id, discount_type, discount_value,
+           valid_from, valid_to, max_uses, used_count, source, remark
+    from public.coupons
+    where tenant_id = $1 and id = $2
+    limit 1
+    ${lock ? 'for update' : ''}
+    `,
+    [tenantId, couponId],
+  );
+  return result.rows[0] || null;
+}
+
+async function findCouponRedemption(client: pg.PoolClient, tenantId: string, userId: string, couponId: string) {
+  const result = await client.query<CouponRedemptionRow>(
+    `
+    select id, coupon_id, coupon_code, user_id, plan_id, order_id, status,
+           discount_applied_cents, region_id, source, remark, claimed_at, used_at
+    from public.coupon_redemptions
+    where tenant_id = $1 and user_id = $2 and coupon_id = $3
+    order by created_at desc
+    limit 1
+    for update
+    `,
+    [tenantId, userId, couponId],
+  );
+  return result.rows[0] || null;
+}
+
+async function claimCoupon(
+  client: pg.PoolClient,
+  input: {
+    tenantId: string;
+    userId: string;
+    code: string;
+    planId?: string | null;
+    regionId?: string | null;
+    baseAmountCents?: number;
+  },
+) {
+  const coupon = await findCouponByCode(client, input.tenantId, input.code, true);
+  if (!coupon) throw new HttpError(404, 'Coupon not found', 'COUPON_NOT_FOUND');
+
+  const validity = couponValidity(coupon);
+  if (!validity.valid) throw new HttpError(409, validity.message, validity.code);
+
+  const planId = input.planId || coupon.plan_id;
+  if (!planId) throw new HttpError(409, 'Coupon is not bound to a plan', 'COUPON_PLAN_MISSING');
+  if (coupon.plan_id && input.planId && coupon.plan_id !== input.planId) {
+    throw new HttpError(409, 'Coupon does not apply to this plan', 'COUPON_PLAN_MISMATCH');
+  }
+
+  const plan = await loadPlan(client, input.tenantId, planId);
+  if (!plan) throw new HttpError(404, 'Coupon plan not found', 'COUPON_PLAN_NOT_FOUND');
+  const finalRegionId = input.regionId || plan.region_id;
+  if (plan.region_id && finalRegionId && plan.region_id !== finalRegionId) {
+    throw new HttpError(409, 'Coupon does not apply to this region', 'COUPON_REGION_MISMATCH');
+  }
+
+  const existing = await findCouponRedemption(client, input.tenantId, input.userId, coupon.id);
+  if (existing?.status === 'used') throw new HttpError(409, 'Coupon already used', 'COUPON_ALREADY_USED');
+  if (existing && !['claimed', 'pending'].includes(existing.status)) {
+    throw new HttpError(409, `Coupon redemption is ${existing.status}`, 'COUPON_REDEMPTION_UNAVAILABLE');
+  }
+
+  const discountCents = calculateCouponDiscount(coupon, input.baseAmountCents ?? plan.price_cents);
+  if (existing) {
+    return { coupon, plan, redemption: existing, discountCents, idempotent: true };
+  }
+
+  const inserted = await client.query<CouponRedemptionRow>(
+    `
+    insert into public.coupon_redemptions (
+      tenant_id, coupon_id, coupon_code, user_id, plan_id, status,
+      discount_applied_cents, region_id, source, remark, claimed_at
+    )
+    values ($1, $2, $3, $4, $5, 'claimed', $6, $7::uuid, $8, $9, now())
+    returning id, coupon_id, coupon_code, user_id, plan_id, order_id, status,
+              discount_applied_cents, region_id, source, remark, claimed_at, used_at
+    `,
+    [
+      input.tenantId,
+      coupon.id,
+      coupon.code,
+      input.userId,
+      plan.id,
+      discountCents,
+      finalRegionId || null,
+      coupon.source,
+      coupon.remark,
+    ],
+  );
+
+  return { coupon, plan, redemption: inserted.rows[0], discountCents, idempotent: false };
+}
+
+function orderDetailPayload(order: OrderDetailRow, payments: unknown[], items: unknown[], redemptions: unknown[]) {
+  const snapshot =
+    order.rawPayload && typeof order.rawPayload === 'object' && 'pricing' in order.rawPayload
+      ? (order.rawPayload as Record<string, unknown>).pricing
+      : null;
+  return {
+    id: order.id,
+    orderNo: order.orderNo,
+    status: order.status,
+    productType: order.productType,
+    productName: order.productName,
+    amountCents: order.amountCents,
+    amount: formatPrice(order.amountCents),
+    payMethod: order.payMethod,
+    payProvider: order.payProvider,
+    tradeNo: order.tradeNo,
+    planId: order.planId,
+    days: order.days,
+    regionId: order.regionId,
+    paidAt: order.paidAt,
+    createdAt: order.createdAt,
+    updatedAt: order.updatedAt,
+    pricing: snapshot,
+    payments,
+    items,
+    couponRedemptions: redemptions,
+  };
+}
+
 export async function createOrderRoute(ctx: RequestContext) {
   const body = await readJsonBody(ctx);
   const tenantId = await tenantIdFrom(ctx);
@@ -78,27 +356,98 @@ export async function createOrderRoute(ctx: RequestContext) {
   const payMethod = optionalString(body, 'payMethod') || 'manual';
   const payProvider = optionalString(body, 'payProvider') || 'manual';
   const regionId = optionalString(body, 'regionId') || null;
+  const couponCode = optionalString(body, 'couponCode');
+  const couponRedemptionId = optionalString(body, 'couponRedemptionId');
 
-  const plan = await queryOne<PlanRow>(
-    `
-    select id, name, price_cents, days, region_id
-    from public.svip_plans
-    where tenant_id = $1 and id = $2 and is_active = true
-    limit 1
-    `,
-    [tenantId, planId],
-  );
+  const plan = await loadPlan(null, tenantId, planId);
 
   if (!plan) {
     throw new HttpError(404, 'SVIP plan not found', 'PLAN_NOT_FOUND');
   }
+  if (plan.coupon_only && !couponCode && !couponRedemptionId) {
+    throw new HttpError(403, 'This plan requires a coupon', 'PLAN_REQUIRES_COUPON');
+  }
 
   const finalRegionId = regionId || plan.region_id;
-  const amountCents = Math.max(0, plan.price_cents * quantity);
-  const days = Math.max(0, plan.days * quantity);
+  const originalAmountCents = Math.max(0, plan.price_cents * quantity);
+  const days = calculatePlanDays(plan.days, quantity);
   const orderNo = createOrderNo(payProvider === 'xpay' ? 'XP' : 'SVIP');
 
   const item = await transaction(async client => {
+    let couponResult:
+      | {
+          coupon: CouponRow;
+          plan: PlanRow;
+          redemption: CouponRedemptionRow;
+          discountCents: number;
+          idempotent: boolean;
+        }
+      | null = null;
+
+    if (couponRedemptionId) {
+      const redemptionResult = await client.query<CouponRedemptionRow>(
+        `
+        select id, coupon_id, coupon_code, user_id, plan_id, order_id, status,
+               discount_applied_cents, region_id, source, remark, claimed_at, used_at
+        from public.coupon_redemptions
+        where tenant_id = $1 and id = $2 and user_id = $3
+        limit 1
+        for update
+        `,
+        [tenantId, couponRedemptionId, userId],
+      );
+      const redemption = redemptionResult.rows[0];
+      if (!redemption) throw new HttpError(404, 'Coupon redemption not found', 'COUPON_REDEMPTION_NOT_FOUND');
+      if (redemption.status === 'used') throw new HttpError(409, 'Coupon already used', 'COUPON_ALREADY_USED');
+      if (redemption.order_id) throw new HttpError(409, 'Coupon redemption is already bound to an order', 'COUPON_REDEMPTION_BOUND');
+      if (redemption.plan_id && redemption.plan_id !== planId) {
+        throw new HttpError(409, 'Coupon does not apply to this plan', 'COUPON_PLAN_MISMATCH');
+      }
+      const coupon = redemption.coupon_id
+        ? await findCouponById(client, tenantId, redemption.coupon_id, true)
+        : await findCouponByCode(client, tenantId, redemption.coupon_code || '', true);
+      if (!coupon) throw new HttpError(404, 'Coupon not found', 'COUPON_NOT_FOUND');
+      const validity = couponValidity(coupon);
+      if (!validity.valid) throw new HttpError(409, validity.message, validity.code);
+      const discountCents = calculateCouponDiscount(coupon, originalAmountCents);
+      couponResult = { coupon, plan, redemption, discountCents, idempotent: true };
+    } else if (couponCode) {
+      const claimed = await claimCoupon(client, {
+        tenantId,
+        userId,
+        code: couponCode,
+        planId,
+        regionId: finalRegionId,
+        baseAmountCents: originalAmountCents,
+      });
+      couponResult = {
+        coupon: claimed.coupon,
+        plan: claimed.plan,
+        redemption: claimed.redemption,
+        discountCents: claimed.discountCents,
+        idempotent: claimed.idempotent,
+      };
+    }
+
+    if (couponResult?.plan.id !== undefined && couponResult.plan.id !== plan.id) {
+      throw new HttpError(409, 'Coupon plan does not match the order plan', 'COUPON_PLAN_MISMATCH');
+    }
+    if (couponResult?.redemption.order_id) {
+      throw new HttpError(409, 'Coupon redemption is already bound to an order', 'COUPON_REDEMPTION_BOUND');
+    }
+
+    const discountCents = couponResult ? Math.min(originalAmountCents, Math.max(0, couponResult.discountCents)) : 0;
+    const amountCents = Math.max(0, originalAmountCents - discountCents);
+    const pricingSnapshot = {
+      quantity,
+      unitAmountCents: plan.price_cents,
+      originalAmountCents,
+      discountCents,
+      amountCents,
+      couponCode: couponResult?.coupon.code || null,
+      couponRedemptionId: couponResult?.redemption.id || null,
+    };
+
     const orderResult = await client.query(
       `
       insert into public.orders (
@@ -123,9 +472,10 @@ export async function createOrderRoute(ctx: RequestContext) {
         planId,
         days,
         finalRegionId,
-        JSON.stringify({ quantity, request: body }),
+        JSON.stringify({ quantity, pricing: pricingSnapshot, request: body }),
       ],
     );
+    const order = orderResult.rows[0];
 
     await client.query(
       `
@@ -134,25 +484,139 @@ export async function createOrderRoute(ctx: RequestContext) {
       `,
       [
         tenantId,
-        orderResult.rows[0].id,
+        order.id,
         planId,
         plan.name,
         quantity,
         plan.price_cents,
-        amountCents,
-        JSON.stringify({ days: plan.days, totalDays: days }),
+        originalAmountCents,
+        JSON.stringify({ days: plan.days, totalDays: days, discountCents, payableAmountCents: amountCents }),
       ],
     );
 
+    if (couponResult) {
+      if (discountCents > 0) {
+        await client.query(
+          `
+          insert into public.order_items (
+            tenant_id, order_id, item_type, item_id, name, quantity,
+            unit_amount_cents, total_amount_cents, metadata
+          )
+          values ($1, $2, 'coupon_discount', $3, $4, 1, -($5::integer), -($5::integer), $6::jsonb)
+          `,
+          [
+            tenantId,
+            order.id,
+            couponResult.coupon.id,
+            `优惠券 ${couponResult.coupon.code}`,
+            discountCents,
+            JSON.stringify({
+              couponCode: couponResult.coupon.code,
+              redemptionId: couponResult.redemption.id,
+              discountType: couponResult.coupon.discount_type,
+              discountValue: couponResult.coupon.discount_value,
+            }),
+          ],
+        );
+      }
+
+      const redemptionUpdate = await client.query(
+        `
+        update public.coupon_redemptions
+        set status = 'used',
+            order_id = $3,
+            plan_id = $4,
+            discount_applied_cents = $5,
+            region_id = coalesce($6::uuid, region_id),
+            used_at = now(),
+            updated_at = now()
+        where tenant_id = $1 and id = $2 and status in ('claimed', 'pending')
+        `,
+        [tenantId, couponResult.redemption.id, order.id, plan.id, discountCents, finalRegionId],
+      );
+      if (redemptionUpdate.rowCount !== 1) {
+        throw new HttpError(409, 'Coupon redemption is no longer available', 'COUPON_REDEMPTION_UNAVAILABLE');
+      }
+
+      await client.query(
+        `
+        update public.coupons
+        set used_count = used_count + 1, updated_at = now()
+        where tenant_id = $1 and id = $2
+        `,
+        [tenantId, couponResult.coupon.id],
+      );
+    }
+
+    const zeroAmountTradeNo = amountCents === 0 ? `zero-${orderNo}` : null;
+    if (zeroAmountTradeNo) {
+      await client.query(
+        `
+        update public.orders
+        set status = 'paid',
+            trade_no = $3,
+            paid_at = now(),
+            updated_at = now()
+        where tenant_id = $1 and id = $2
+        `,
+        [tenantId, order.id, zeroAmountTradeNo],
+      );
+      order.status = 'paid';
+    }
+
     await client.query(
       `
-      insert into public.payments (tenant_id, order_id, provider, method, status, amount_cents, raw_payload)
-      values ($1, $2, $3, $4, 'pending', $5, $6::jsonb)
+      insert into public.payments (
+        tenant_id, order_id, provider, method, status, amount_cents,
+        provider_trade_no, paid_at, raw_payload
+      )
+      values (
+        $1, $2, $3, $4, $5, $6,
+        $7, case when $7::text is null then null else now() end, $8::jsonb
+      )
       `,
-      [tenantId, orderResult.rows[0].id, payProvider, payMethod, amountCents, JSON.stringify({ request: body })],
+      [
+        tenantId,
+        order.id,
+        payProvider,
+        payMethod,
+        zeroAmountTradeNo ? 'paid' : 'pending',
+        amountCents,
+        zeroAmountTradeNo,
+        JSON.stringify({ pricing: pricingSnapshot, request: body }),
+      ],
     );
 
-    return orderResult.rows[0];
+    const entitlement =
+      amountCents === 0
+        ? await grantSvipEntitlement(client, {
+            tenantId,
+            userId,
+            days,
+            regionId: finalRegionId,
+            sourceType: 'order',
+            sourceId: order.id,
+            metadata: {
+              orderNo,
+              paymentProvider: payProvider,
+              zeroAmountCheckout: true,
+              couponCode: couponResult?.coupon.code || null,
+            },
+          })
+        : null;
+
+    return {
+      ...order,
+      status: amountCents === 0 ? 'paid' : order.status,
+      tradeNo: zeroAmountTradeNo,
+      originalAmountCents,
+      discountCents,
+      amount: formatPrice(amountCents),
+      entitlement,
+      coupon: couponResult
+        ? couponPayload(couponResult.coupon, couponResult.plan, couponResult.redemption, discountCents)
+        : null,
+    };
   });
 
   return { item };
@@ -182,6 +646,128 @@ export async function ordersRoute(ctx: RequestContext) {
   return { items };
 }
 
+async function loadOrderDetail(tenantId: string, userId: string, orderNo: string) {
+  const order = await queryOne<OrderDetailRow>(
+    `
+    select id, order_no as "orderNo", status, product_type as "productType",
+           product_name as "productName", amount_cents as "amountCents",
+           pay_method as "payMethod", pay_provider as "payProvider",
+           trade_no as "tradeNo", plan_id as "planId", days, user_id as "userId",
+           region_id as "regionId", paid_at as "paidAt", raw_payload as "rawPayload",
+           created_at as "createdAt", updated_at as "updatedAt"
+    from public.orders
+    where tenant_id = $1 and user_id = $2 and order_no = $3
+    limit 1
+    `,
+    [tenantId, userId, orderNo],
+  );
+  if (!order) throw new HttpError(404, 'Order not found', 'ORDER_NOT_FOUND');
+
+  const [payments, items, redemptions] = await Promise.all([
+    query(
+      `
+      select id, provider, method, status, amount_cents as "amountCents",
+             provider_trade_no as "providerTradeNo", paid_at as "paidAt",
+             created_at as "createdAt", updated_at as "updatedAt"
+      from public.payments
+      where tenant_id = $1 and order_id = $2
+      order by created_at desc
+      `,
+      [tenantId, order.id],
+    ),
+    query(
+      `
+      select id, item_type as "itemType", item_id as "itemId", name, quantity,
+             unit_amount_cents as "unitAmountCents", total_amount_cents as "totalAmountCents",
+             metadata
+      from public.order_items
+      where tenant_id = $1 and order_id = $2
+      order by case item_type when 'svip_plan' then 0 when 'coupon_discount' then 1 else 2 end, id
+      `,
+      [tenantId, order.id],
+    ),
+    query(
+      `
+      select id, coupon_code as "couponCode", status, discount_applied_cents as "discountAppliedCents",
+             region_id as "regionId", claimed_at as "claimedAt", used_at as "usedAt"
+      from public.coupon_redemptions
+      where tenant_id = $1 and order_id = $2 and user_id = $3
+      order by created_at desc
+      `,
+      [tenantId, order.id, userId],
+    ),
+  ]);
+
+  return orderDetailPayload(order, payments, items, redemptions);
+}
+
+export async function orderDetailRoute(ctx: RequestContext) {
+  const tenantId = await tenantIdFrom(ctx);
+  const userId = await userIdFrom(ctx);
+  const orderNo = stringParam(ctx, 'orderNo');
+  if (!orderNo) throw new HttpError(400, 'orderNo is required', 'ORDER_NO_REQUIRED');
+  return { item: await loadOrderDetail(tenantId, userId, orderNo) };
+}
+
+export async function orderStatusRoute(ctx: RequestContext) {
+  const tenantId = await tenantIdFrom(ctx);
+  const userId = await userIdFrom(ctx);
+  const orderNo = stringParam(ctx, 'orderNo');
+  if (!orderNo) throw new HttpError(400, 'orderNo is required', 'ORDER_NO_REQUIRED');
+
+  const order = await queryOne<OrderDetailRow>(
+    `
+    select id, order_no as "orderNo", status, product_type as "productType",
+           product_name as "productName", amount_cents as "amountCents",
+           pay_method as "payMethod", pay_provider as "payProvider",
+           trade_no as "tradeNo", plan_id as "planId", days, user_id as "userId",
+           region_id as "regionId", paid_at as "paidAt", raw_payload as "rawPayload",
+           created_at as "createdAt", updated_at as "updatedAt"
+    from public.orders
+    where tenant_id = $1 and user_id = $2 and order_no = $3
+    limit 1
+    `,
+    [tenantId, userId, orderNo],
+  );
+  if (!order) throw new HttpError(404, 'Order not found', 'ORDER_NOT_FOUND');
+
+  const latestPayment = await queryOne<{
+    provider: string;
+    method: string | null;
+    status: string;
+    amountCents: number;
+    providerTradeNo: string | null;
+    paidAt: string | null;
+    updatedAt: string;
+  }>(
+    `
+    select provider, method, status, amount_cents as "amountCents",
+           provider_trade_no as "providerTradeNo", paid_at as "paidAt",
+           updated_at as "updatedAt"
+    from public.payments
+    where tenant_id = $1 and order_id = $2
+    order by updated_at desc
+    limit 1
+    `,
+    [tenantId, order.id],
+  );
+
+  return {
+    item: {
+      orderNo: order.orderNo,
+      status: order.status,
+      amountCents: order.amountCents,
+      amount: formatPrice(order.amountCents),
+      payProvider: order.payProvider,
+      payMethod: order.payMethod,
+      tradeNo: order.tradeNo,
+      paidAt: order.paidAt,
+      updatedAt: order.updatedAt,
+      payment: latestPayment,
+    },
+  };
+}
+
 export async function entitlementsRoute(ctx: RequestContext) {
   const tenantId = await tenantIdFrom(ctx);
   const userId = await userIdFrom(ctx);
@@ -281,7 +867,9 @@ export async function entitlementCheckRoute(ctx: RequestContext) {
 
 export async function confirmManualPaymentRoute(ctx: RequestContext) {
   const body = await readJsonBody(ctx);
-  const tenantId = await tenantIdFrom(ctx);
+  const auth = await requireTenantAdmin(ctx);
+  requireTenantPermission(auth, 'tenant:payment:write');
+  const tenantId = auth.tenantId;
   const orderNo = requiredString(body, 'orderNo');
   const providerTradeNo = optionalString(body, 'providerTradeNo') || `manual-${orderNo}`;
   const amountCents = optionalInteger(body, 'amountCents', -1);
@@ -342,7 +930,7 @@ export async function confirmManualPaymentRoute(ctx: RequestContext) {
       metadata: { orderNo },
     });
 
-    return { orderNo, status: 'paid', entitlement };
+    return { orderNo, status: 'paid', confirmedBy: auth.userId, entitlement };
   });
 
   return { item };
@@ -708,11 +1296,95 @@ export async function paymentNotifyRoute(ctx: RequestContext) {
   return { item };
 }
 
+export async function checkActivationCodeRoute(ctx: RequestContext) {
+  const body = await readJsonBody(ctx);
+  const tenantId = await tenantIdFrom(ctx);
+  const userId = await userIdFrom(ctx, body);
+  const code = normalizeCode(requiredString(body, 'code'));
+  const regionId = optionalString(body, 'regionId') || null;
+
+  const activationCode = await queryOne<{
+    id: string;
+    code: string;
+    days: number;
+    isUsed: boolean;
+    usedRegionId: string | null;
+    agentUserId: string | null;
+    saleType: string | null;
+    unitPriceCents: number | null;
+    soldTo: string | null;
+    remark: string | null;
+    regionName: string | null;
+  }>(
+    `
+    select ac.id, ac.code::text as code, ac.days, ac.is_used as "isUsed",
+           ac.used_region_id as "usedRegionId", ac.agent_user_id as "agentUserId",
+           ac.sale_type as "saleType", ac.unit_price_cents as "unitPriceCents",
+           ac.sold_to as "soldTo", ac.remark, r.name as "regionName"
+    from public.activation_codes ac
+    left join public.regions r on r.tenant_id = ac.tenant_id and r.id = ac.used_region_id
+    where ac.tenant_id = $1 and lower(ac.code::text) = lower($2)
+    limit 1
+    `,
+    [tenantId, code],
+  );
+
+  if (!activationCode) {
+    return {
+      valid: false,
+      code,
+      reasonCode: 'ACTIVATION_CODE_NOT_FOUND',
+      message: 'Activation code not found',
+    };
+  }
+  if (activationCode.isUsed) {
+    return {
+      valid: false,
+      code: activationCode.code,
+      reasonCode: 'ACTIVATION_CODE_USED',
+      message: 'Activation code already used',
+      days: activationCode.days,
+    };
+  }
+  if (activationCode.agentUserId && activationCode.agentUserId === userId) {
+    return {
+      valid: false,
+      code: activationCode.code,
+      reasonCode: 'ACTIVATION_CODE_SELF_REDEEM_FORBIDDEN',
+      message: 'Cannot redeem your own activation code',
+      days: activationCode.days,
+    };
+  }
+  if (regionId && activationCode.usedRegionId && regionId !== activationCode.usedRegionId) {
+    return {
+      valid: false,
+      code: activationCode.code,
+      reasonCode: 'ACTIVATION_CODE_REGION_MISMATCH',
+      message: 'Activation code does not apply to this region',
+      days: activationCode.days,
+      regionId: activationCode.usedRegionId,
+      regionName: activationCode.regionName,
+    };
+  }
+
+  return {
+    valid: true,
+    code: activationCode.code,
+    days: activationCode.days,
+    regionId: activationCode.usedRegionId,
+    regionName: activationCode.regionName,
+    saleType: activationCode.saleType,
+    unitPriceCents: activationCode.unitPriceCents,
+    soldTo: activationCode.soldTo,
+    remark: activationCode.remark,
+  };
+}
+
 export async function redeemActivationCodeRoute(ctx: RequestContext) {
   const body = await readJsonBody(ctx);
   const tenantId = await tenantIdFrom(ctx);
   const userId = await userIdFrom(ctx, body);
-  const code = requiredString(body, 'code');
+  const code = normalizeCode(requiredString(body, 'code'));
   const regionId = optionalString(body, 'regionId') || null;
 
   const item = await transaction(async client => {
@@ -722,9 +1394,10 @@ export async function redeemActivationCodeRoute(ctx: RequestContext) {
       days: number;
       is_used: boolean;
       used_region_id: string | null;
+      agent_user_id: string | null;
     }>(
       `
-      select id, code, days, is_used, used_region_id
+      select id, code::text as code, days, is_used, used_region_id, agent_user_id
       from public.activation_codes
       where tenant_id = $1 and lower(code::text) = lower($2)
       limit 1
@@ -740,6 +1413,12 @@ export async function redeemActivationCodeRoute(ctx: RequestContext) {
     if (activationCode.is_used) {
       throw new HttpError(409, 'Activation code already used', 'ACTIVATION_CODE_USED');
     }
+    if (activationCode.agent_user_id && activationCode.agent_user_id === userId) {
+      throw new HttpError(409, 'Cannot redeem your own activation code', 'ACTIVATION_CODE_SELF_REDEEM_FORBIDDEN');
+    }
+    if (regionId && activationCode.used_region_id && regionId !== activationCode.used_region_id) {
+      throw new HttpError(409, 'Activation code does not apply to this region', 'ACTIVATION_CODE_REGION_MISMATCH');
+    }
 
     const finalRegionId = regionId || activationCode.used_region_id;
     await client.query(
@@ -769,3 +1448,35 @@ export async function redeemActivationCodeRoute(ctx: RequestContext) {
 
   return { item };
 }
+
+export async function claimCouponRoute(ctx: RequestContext) {
+  const body = await readJsonBody(ctx);
+  const tenantId = await tenantIdFrom(ctx);
+  const userId = await userIdFrom(ctx, body);
+  const code = normalizeCode(requiredString(body, 'code'));
+  const planId = optionalString(body, 'planId') || null;
+  const regionId = optionalString(body, 'regionId') || null;
+
+  const result = await transaction(async client => {
+    const claimed = await claimCoupon(client, {
+      tenantId,
+      userId,
+      code,
+      planId,
+      regionId,
+    });
+    return {
+      valid: true,
+      idempotent: claimed.idempotent,
+      coupon: couponPayload(claimed.coupon, claimed.plan, claimed.redemption, claimed.discountCents),
+      redemption: {
+        id: claimed.redemption.id,
+        status: claimed.redemption.status,
+        claimedAt: claimed.redemption.claimed_at,
+        usedAt: claimed.redemption.used_at,
+      },
+    };
+  });
+
+  return result;
+}
diff --git a/apps/api/src/features/commerce/service.ts b/apps/api/src/features/commerce/service.ts
index 6e0470e8..b5a1ba77 100644
--- a/apps/api/src/features/commerce/service.ts
+++ b/apps/api/src/features/commerce/service.ts
@@ -12,7 +12,9 @@ interface EntitlementInput {
 }
 
 export async function grantSvipEntitlement(client: pg.PoolClient, input: EntitlementInput) {
-  const days = Math.max(0, Math.trunc(input.days || 0));
+  const days = Math.trunc(input.days || 0);
+  const expiresAtSql =
+    days < 0 ? `'2099-12-31T23:59:59Z'::timestamptz` : `$8::timestamptz + ($9::text || ' days')::interval`;
   const scopeType = input.regionId ? 'region' : 'tenant';
   const startsAtResult = await client.query<{ starts_at: string }>(
     `
@@ -41,7 +43,7 @@ export async function grantSvipEntitlement(client: pg.PoolClient, input: Entitle
     values (
       $1, $2, 'svip', $3, $4,
       $5, $6, $7, $8::timestamptz,
-      $8::timestamptz + ($9::text || ' days')::interval,
+      ${expiresAtSql},
       'active', $10::jsonb
     )
     returning id, entitlement_type as "entitlementType", scope_type as "scopeType",
diff --git a/docs/refactor/api-structure.md b/docs/refactor/api-structure.md
index bd8b5d7a..2b9f1778 100644
--- a/docs/refactor/api-structure.md
+++ b/docs/refactor/api-structure.md
@@ -18,7 +18,7 @@ apps/api/src/
     tenant/                 租户解析、品牌配置、域名识别
     catalog/                公开题库、内容入口、分类树、题目集合、练习蓝图、手册、商城、资料资源只读接口
     learning/               组卷 session、答题、错题、收藏、练习进度、排行榜
-    commerce/               订单、支付确认、激活码、权益
+    commerce/               订单、支付确认、激活码、优惠券、权益
     referral/               销售/代理客资追踪、首绑保护、团队关系、CRM 队列
     storage/                对象存储签名 provider
     video/                  题目视频列表、搜索、SVIP/次数校验和签名播放
@@ -35,7 +35,7 @@ apps/api/src/
 features/
   auth/                     登录、绑定手机、OAuth 回调、会话换取
   learning/                 顺序/随机/模考组卷、答题记录、错题、收藏、学习进度、排行榜
-  commerce/                 商品、订单、支付、退款、权益开通
+  commerce/                 商品、订单、优惠券、支付、退款、权益开通
   referral/                 销售/代理增长链路、客资归属、分佣依据、CRM 入队
   platform-admin/           平台租户管理、年费、服务费、账务审计
   tenant-admin/             合作商后台配置、品牌、域名、收款账户、登录 provider、密钥掩码、成员权限、审计、活动、兑换码、优惠券
diff --git a/docs/refactor/backend-capability-status.md b/docs/refactor/backend-capability-status.md
index dc5391b5..ed582b45 100644
--- a/docs/refactor/backend-capability-status.md
+++ b/docs/refactor/backend-capability-status.md
@@ -99,14 +99,14 @@
 | 能力 | 状态 | 说明 |
 | --- | --- | --- |
 | SVIP 套餐 | 可联调 | `/api/catalog/svip-plans` |
-| 创建订单/订单列表 | 可联调 | `/api/commerce/orders` |
-| 手工支付确认 | 迁移期 | 可用于测试，不是生产支付 |
+| 创建订单/订单列表/订单详情/状态轮询 | 可联调 | `/api/commerce/orders`、`orders/detail`、`orders/status`；订单金额、优惠券抵扣、零元订单都以后端计算为准 |
+| 手工支付确认 | 迁移期 | `/api/commerce/payments/manual-confirm` 仅允许具备 `tenant:payment:write` 的租户后台成员调用，用于线下收款/本地测试 |
 | 微信支付 JSAPI | 可联调 | `/api/commerce/payments/create`、`notify/wechat_pay`，已覆盖 API v3 签名、通知解密、幂等和权益开通 |
 | 支付宝 WAP/H5 | 可联调 | `/api/commerce/payments/create`、`notify/alipay`，已覆盖 RSA2 通知验签、幂等和权益开通 |
 | 权益查询/校验 | 可联调 | `/api/commerce/entitlements` |
-| 激活码兑换 | 可联调 | 事务开通权益 |
+| 激活码预检查/兑换 | 可联调 | `/api/commerce/activation-codes/check`、`redeem`；支持地区校验、自用码拒绝、已用码稳定 reasonCode |
 | 优惠券后台配置 | 可联调 | `/api/tenant-admin/coupons` |
-| 优惠券前台兑换/下单抵扣 | 待补齐 | 后端还需接入下单计算 |
+| 优惠券前台领取/下单抵扣 | 可联调 | `/api/commerce/coupons/claim`；支持同用户同券幂等领取、下单绑定、负数订单项、全额优惠自动开通权益 |
 | 退款/补偿/对账 | 待补齐 | 需退款接口、支付补偿任务、对账、异常订单处理 |
 
 ## 租户后台与平台后台
diff --git a/docs/refactor/backend-handoff-roadmap.md b/docs/refactor/backend-handoff-roadmap.md
index cae5e17f..08cd6903 100644
--- a/docs/refactor/backend-handoff-roadmap.md
+++ b/docs/refactor/backend-handoff-roadmap.md
@@ -10,7 +10,7 @@
 
 - 平台侧可以管理租户、SaaS 套餐、订阅、账单、服务费和用量。
 - 租户侧可以管理品牌、域名、支付账户、登录配置、私密密钥、活动、兑换码、优惠券、成员权限、审计日志、内容入口、分类树、题目集合、练习蓝图、题目、视频、分数线、单词、知识手册和资料资源。
-- 学生侧已经有题库入口、分类树、题目集合、顺序/随机/全真模拟组卷、答题、错题、收藏、背单词进度、个人中心、排行榜、分数线、视频、订单、权益、激活码兑换和资料下载的基础 API。
+- 学生侧已经有题库入口、分类树、题目集合、顺序/随机/全真模拟组卷、答题、错题、收藏、背单词进度、个人中心、排行榜、分数线、视频、订单详情/状态轮询、优惠券领取/抵扣、权益、激活码预检查/兑换和资料下载的基础 API。
 - 销售/代理/CRM 已经有邀请码、扫码/分享事件、首绑客资保护、团队关系、统计、CRM 配置和入队能力。
 - 旧题库 JSON、单词模板、知识手册嵌套模板已经进入后端 preview/import 管线，由后端负责规范化、校验、幂等、审计和租户隔离。
 
@@ -29,7 +29,7 @@
 | 分数线 | 可联调 | 院校、专业、动态字段、记录、年份、趋势、后台维护 | 批量导入、复杂筛选、AI 择校上下文 |
 | 视频解析 | 部分完成 | 单题视频、批量查询、后台视频绑定 | 会员播放权限、播放次数扣减、签名 URL、防盗链、水印 |
 | 资料下载 | 部分完成 | 资源台账、SVIP 权限校验、`local_dev`/阿里云 OSS/腾讯 COS/Supabase Storage 上传下载签名 | 上传后对象校验、PDF 预览、防盗链、视频水印 |
-| 会员与订单 | 基础完成 | 下单、手动确认、激活码兑换、权益发放 | 微信支付、支付宝、退款、webhook 验签和幂等 |
+| 会员与订单 | 可联调 | 下单、订单详情/状态轮询、优惠券领取/抵扣、零元订单自动开通、手工确认权限保护、激活码预检查/兑换、微信支付、支付宝、权益发放 | 退款、对账、支付补偿、异常订单处理 |
 | 登录认证 | 迁移期可用 | 短信 mock、迁移期 session、OAuth 配置表 | 阿里云/腾讯云短信、微信小程序/网页登录、QQ 登录、Supabase Auth |
 | 销售/代理/CRM | 基础完成 | 邀请码、首绑保护、团队关系、销售统计、CRM 入队 | 小程序码真实生成、分佣结算、钉钉/飞书/企微 worker |
 | 内容导入 | 基础完成 | 题目、单词、知识手册 JSON preview/import、issue、job、审计、幂等 | Excel/CSV、分数线、视频导入，大批量异步 worker |
@@ -65,7 +65,7 @@
 
 5. 个人中心
    - 调 `GET /api/profile/me`。
-   - 接会员权益、订单、激活码兑换、错题本、收藏夹、学习统计和排行榜。
+   - 接会员权益、订单详情/状态轮询、优惠券、激活码预检查/兑换、错题本、收藏夹、学习统计和排行榜。
 
 6. 资料、视频和支付
    - 资料下载、PDF 预览、视频播放必须先请求后端签名或权限检查。
@@ -83,8 +83,8 @@
 
 ### P1：商用收费和运营能力
 
-- 微信支付、支付宝、XPay 或实际支付网关 adapter。
-- 支付 webhook 验签、幂等、退款、补偿任务。
+- 退款、对账、支付补偿任务和异常订单处理。
+- XPay 或其它实际支付网关 adapter。
 - 阿里云/腾讯云短信、微信小程序登录、微信网页登录、QQ 登录。
 - 公共题库/地区题库授权，租户按 SaaS 套餐购买地区、科目和题库范围。
 - Excel/CSV、分数线、视频批量导入。
diff --git a/docs/refactor/backend-progress.md b/docs/refactor/backend-progress.md
index 471d3a14..7a8cd03f 100644
--- a/docs/refactor/backend-progress.md
+++ b/docs/refactor/backend-progress.md
@@ -11,7 +11,7 @@
   - `profile`：学生个人中心、目标院校/专业、会员状态、统计聚合、最近练习、考试倒计时、签到积分、题目反馈。
   - `scoreline`：分数线字段、院校、专业、记录、趋势、年份。
   - `video`：题目视频讲解、批量预加载、通用视频搜索。
-  - `commerce`：订单、支付确认、激活码兑换、权益查询。
+  - `commerce`：订单创建/列表/详情/状态轮询、支付确认、支付 provider/webhook、激活码预检查/兑换、优惠券领取/抵扣、权益查询。
   - `referral`：销售/代理邀请码、首绑客资保护、销售统计、团队关系、CRM 队列。
   - `platform-admin`：平台方租户管理、SaaS 套餐、订阅、账单、服务费收款、使用量。
   - `tenant-admin`：租户资料、品牌、公开设置、域名、支付账户、登录 provider、私密密钥掩码、活动内容、考试日期、题目反馈处理、激活码批次、优惠券、成员管理、角色模板、班级/学生/教师范围权限、权限矩阵、审计查询。
@@ -127,8 +127,15 @@ PUT  /api/tenant-content/handbook-chapters
 PUT  /api/tenant-content/handbook-entries
 POST /api/commerce/orders
 GET  /api/commerce/orders
+GET  /api/commerce/orders/detail
+GET  /api/commerce/orders/status
+POST /api/commerce/payments/create
 POST /api/commerce/payments/manual-confirm
+POST /api/commerce/payments/notify/wechat_pay
+POST /api/commerce/payments/notify/alipay
+POST /api/commerce/activation-codes/check
 POST /api/commerce/activation-codes/redeem
+POST /api/commerce/coupons/claim
 GET  /api/commerce/entitlements
 GET  /api/commerce/entitlements/check
 POST /api/referral/invite-code
@@ -209,7 +216,9 @@ GET  /api/tenant-admin/audit-logs
 - `platform-admin` 已支持平台管理员 Supabase JWT；`x-platform-admin-key` 只作为非生产兼容保护。
 - B 端合作商年费/服务费使用 `tenant_invoices`、`tenant_invoice_items`、`tenant_invoice_payments`，不与 C 端学生订单混表。
 - 订单金额以后端套餐价格为准，不信任前端传价。
-- 激活码兑换和支付成功都走同一套 `grantSvipEntitlement` 权益开通逻辑。
+- 激活码兑换、支付成功和零元优惠订单都走同一套 `grantSvipEntitlement` 权益开通逻辑。
+- 优惠券领取同用户同券幂等；下单后优惠券 redemption 会绑定订单并进入 `used`，订单明细会写入负数 `coupon_discount` 项。
+- `/api/commerce/payments/manual-confirm` 是线下收款/迁移期能力，只允许租户后台具备 `tenant:payment:write` 的成员调用，普通学生不能伪造手工支付成功。
 - 租户支付账户、短信、OAuth 登录配置接口只保存公开配置；密钥进入 `app_private.tenant_secrets` 或生产 KMS/Vault，API 只返回 `secretRef` 和掩码状态。
 - `tenant-admin` 采用角色默认权限 + `tenant_memberships.permissions` 覆盖的权限矩阵。成员可进入后台，但每个接口会校验具体权限点；学生和跨租户成员会被拒绝。
 - 当前默认角色：`tenant_owner`/`tenant_admin` 全权限，`tenant_operator` 可维护内容和活动，`teacher` 可维护内容并按班级范围查看学生，`sales` 可维护激活码和优惠券，`agent` 只读部分兑换码/优惠券。
@@ -227,7 +236,7 @@ GET  /api/tenant-admin/audit-logs
 1. 完善内容导入和文件上传：Excel/CSV、分数线、视频导入，对象存储上传后校验、PDF 预览、防盗链和视频水印。
 2. 接入真实短信 provider：阿里云/腾讯云，密钥放 `app_private.tenant_secrets` 或生产 Vault。
 3. 接入真实 OAuth provider：微信网页、微信小程序、QQ，并处理旧 PocketBase 身份映射。
-4. 增加真实支付 provider：XPay、微信支付、支付宝，并完善 webhook 幂等。
+4. 补退款、支付补偿任务、对账、异常订单处理和优惠券核销报表。
 5. 增加 `apps/worker`：支付补偿、CRM webhook、日报统计、导入后检查。
 6. 开始 Taro scaffold，把 `supabaseApi` 抽到跨端包或适配层。
 
diff --git a/docs/refactor/implementation-status.md b/docs/refactor/implementation-status.md
index affd352e..1e69eb21 100644
--- a/docs/refactor/implementation-status.md
+++ b/docs/refactor/implementation-status.md
@@ -27,14 +27,14 @@
 | 刷题题库 | 已建题库、题目、题目版本、内容入口、任意深度分类树、考试意向标记、题目集合、练习蓝图、导入任务台账 | 已支持核心映射，JSON 导入可落到新入口/节点/集合 | 题目列表、内容入口、分类树、集合题目、顺序/随机/全真模拟 session、答题提交、租户后台题目录入/更新、JSON 预览/导入已实现 | 核心 API 集成测试含导航、组卷、导入断言 | 新题库导航和组卷基础闭环可跑，完整交卷评分报告、Excel 导入、公题库采纳/授权仍需补齐 |
 | 错题本 | 已建 `wrong_questions` | 已支持旧错题归一化 | 错题列表、答题自动入错题、移出错题已实现 | 仅烟测 | 基础功能已实现，复习计划和统计未完成 |
 | 收藏夹 | 已建 `favorite_questions` | 已支持旧收藏归一化 | 收藏/取消收藏、收藏列表已实现 | 仅烟测 | 基础功能已实现 |
-| 用户订阅/题库会员/SVIP | 已建 `orders`、`payments`、`entitlements`、`svip_plans`、激活码 | 已映射旧 SVIP/会员权益 | 下单、手动支付确认、激活码兑换、权益查询已实现 | 仅烟测 | 业务骨架可跑，真实微信/支付宝支付和 webhook 未完成 |
+| 用户订阅/题库会员/SVIP | 已建 `orders`、`payments`、`entitlements`、`svip_plans`、激活码 | 已映射旧 SVIP/会员权益 | 下单、订单详情/状态轮询、手工支付确认权限保护、微信/支付宝支付、激活码预检查/兑换、优惠券抵扣、零元订单自动开通、权益查询已实现 | API 集成测试 | 商城主链路可联调，退款/对账/支付补偿和异常订单处理待补 |
 | 背单词 | 已建单词单元、单词、进度、收藏表，并可绑定 `content_entries/content_nodes` | 已支持内容和部分用户状态映射 | 单元/单词只读、进度、收藏、统计、每日复习计划、租户后台单词维护 API、旧模板/新模板 JSON 预览导入、排行榜已实现 | 核心 API 集成测试含导入和排行榜断言 | 学生端学习状态、后台维护、批量 JSON 导入和基础排行榜已实现，更细复习参数和后台统计待完善 |
 | 知识手册 | 已建手册科目、章节、条目，并可绑定 `content_entries/content_nodes` | 已支持内容导入 | 只读 API、租户后台手册科目/章节/条目维护 API、嵌套 JSON 预览导入已实现 | 核心 API 集成测试含导入断言 | 学生端阅读、后台维护和批量 JSON 导入基础可用，富文本资源/版本管理待补 |
 | 分数线 | 已建院校、专业、字段、记录表 | 已支持导入映射 | 字段、院校、专业、记录、趋势、年份、租户后台维护 API 已实现 | 核心 API 集成测试 | 查询和后台维护基础闭环已实现，复杂动态筛选/批量导入待补 |
 | 题目视频讲解 | 已建 `video_explanations`、`question_videos` | 已支持导入映射 | 单题视频、批量预加载、通用视频搜索、租户后台视频创建绑定 API 已实现 | 核心 API 集成测试 | 播放数据和后台绑定链路已实现，会员权限、签名 URL、播放统计待补 |
 | 资料下载/PDF | 已扩展 `content_assets`，新增资源台账和导入任务表 | 旧 `app_assets/images` 兼容导入 | 租户后台资源管理、上传/下载签名占位、学生端资料列表/下载权限已实现 | 核心 API 集成测试含 SVIP 资料下载 | 资料资源基础闭环可跑，真实 OSS/COS 签名、PDF 预览渲染、资料下载前端待补 |
 | 个人中心 | 已建 `student_profiles`、会员权益、订单、练习记录 | 已支持部分用户资料导入 | 个人资料、目标院校/专业、会员状态、最近练习、统计聚合 API 已实现 | 核心 API 烟测 | 学生端基础个人中心已实现，签到/任务/更细统计待补 |
-| 活动/优惠 | 已建优惠券、激活码、激活码批次、banner、FAQ、公告等基础表 | 部分支持 | banner/FAQ/公告只读与租户后台维护、激活码兑换、激活码批次、批量生成激活码、优惠券维护已实现 | 核心 API 集成测试 | 基础运营后台可用，复杂活动规则、营销自动化、核销报表待补 |
+| 活动/优惠 | 已建优惠券、激活码、激活码批次、banner、FAQ、公告等基础表 | 部分支持 | banner/FAQ/公告只读与租户后台维护、激活码预检查/兑换、激活码批次、批量生成激活码、优惠券维护、前台领取/下单抵扣已实现 | 核心 API 集成测试 | 基础运营后台可用，复杂活动规则、营销自动化、核销报表待补 |
 | 销售/代理客资追踪 | 已建推荐码、首绑客资、团队关系、小程序码缓存、CRM 队列 | 旧 `referral_tracks` 已有映射基础 | 邀请码、扫码/分享事件、首绑保护、销售统计、客资明细、手动补绑、团队关系、CRM 配置/队列已实现 | 核心 API 集成测试 | 增长链路基础可用，真实微信小程序码、分佣结算单、CRM worker 推送待补 |
 | 租户后台 | 已建品牌、域名、设置、支付账户、登录 provider、私密密钥表、成员、审计日志、资源台账、导入台账、内容导航台账 | 不适用 | 概览、品牌、设置、域名、支付账户、登录配置、密钥掩码、活动内容、兑换码/优惠券、成员管理、权限矩阵、审计查询、内容入口/分类树/题目集合/练习蓝图维护、资源管理、题目 JSON 导入已实现 | 核心 API 集成测试含角色/权限/租户隔离/密钥不泄露/导航/组卷/资源与导入断言 | 租户配置与运营闭环可用，前端权限 UI、Excel 导入、真实对象存储签名待补 |
 | 平台后台 | 已建 SaaS 套餐、订阅、账单、服务费、用量 | 不适用 | 租户管理、账单、收款确认、用量记录、平台管理员 Supabase JWT 鉴权已实现 | API 集成测试 | 平台收费链路骨架可用，平台审计报表/自动计费待补 |
@@ -166,10 +166,17 @@ tenant-content:
 commerce:
   POST /api/commerce/orders
   GET  /api/commerce/orders
+  GET  /api/commerce/orders/detail
+  GET  /api/commerce/orders/status
   GET  /api/commerce/entitlements
   GET  /api/commerce/entitlements/check
+  POST /api/commerce/payments/create
   POST /api/commerce/payments/manual-confirm
+  POST /api/commerce/payments/notify/wechat_pay
+  POST /api/commerce/payments/notify/alipay
+  POST /api/commerce/activation-codes/check
   POST /api/commerce/activation-codes/redeem
+  POST /api/commerce/coupons/claim
 
 referral/crm:
   POST /api/referral/invite-code
@@ -240,10 +247,10 @@ platform-admin:
 上线前至少还需要完成：
 
 1. 正式鉴权：API 已支持 Supabase Auth JWT；生产前继续做真实云端 Auth/JWKS 回归、RLS 深测，并关闭 `x-user-id`、`x-platform-admin-key` 兼容入口。
-2. 国内能力接入：短信、微信登录、微信小程序登录、QQ 登录、微信支付、支付宝支付的租户级配置入口已具备，但真实 provider adapter、回调验签和 webhook 幂等仍需实现。
+2. 国内能力接入：短信、微信小程序登录、微信支付、支付宝支付的租户级配置入口和本地 provider 验证已具备；微信网页登录、QQ 登录、真实生产账号联调、退款/对账和支付补偿仍需实现。
 3. 核心缺口 API：学生端个人中心、分数线、题目视频详情、背单词进度/收藏已补基础 API；下一步重点是后台维护、权限、统计和真实业务验收。
 4. 后台能力：题库录入、题目/单词/知识手册 JSON 批量导入、资源台账、视频绑定、知识手册维护、分数线维护、品牌/商户/登录/活动/兑换码配置、销售客资、CRM 队列、成员权限、审计查询已补 API；Excel 导入、分数线/视频导入、真实对象存储签名和前端操作台待补。
-5. 自动化测试：已建立核心 API、租户隔离、权限矩阵、后台维护、资源/导入集成测试；仍需真实数据导入回归、支付幂等、前端端到端测试。
+5. 自动化测试：已建立核心 API、租户隔离、权限矩阵、后台维护、资源/导入、微信/支付宝支付 webhook、优惠券/激活码/订单状态集成测试；仍需真实数据导入回归、退款对账和前端端到端测试。
 6. Taro 前端：建立 `apps/taro` 或等价跨端应用，把 H5 和小程序统一走同一套 API client。
 7. 运维交付：生产环境变量、备份恢复、日志监控、异常告警、数据库迁移流程、灰度发布、回滚预案。
 
@@ -256,4 +263,4 @@ platform-admin:
 3. 补学习统计增强：排行榜防刷/预聚合、断点续练、专项练习策略和更细题型分析。
 4. 补视频商用控制：SVIP 权限、签名 URL、防盗链、水印、播放次数扣减。
 5. 补 AI 择校推荐报告、排行榜防刷/预聚合、勋章自动发放。
-6. 接真实支付、短信、微信/QQ 登录 provider adapter，并开始 Taro scaffold。
+6. 接真实短信、微信网页/QQ 登录、退款对账和补偿任务，并开始 Taro scaffold。
diff --git a/docs/refactor/legacy-feature-gap-matrix.md b/docs/refactor/legacy-feature-gap-matrix.md
index e7f16331..f5855bbd 100644
--- a/docs/refactor/legacy-feature-gap-matrix.md
+++ b/docs/refactor/legacy-feature-gap-matrix.md
@@ -30,7 +30,7 @@
 | 背单词 | `VocabularyPage.tsx`、`VocabularyQuiz.tsx` | 部分覆盖 | 单词列表、进度、收藏、统计、每日计划和后端复习调度已覆盖；后续补收藏练习体验、发音/音频策略、排行榜和更精细的间隔算法参数 |
 | 知识手册 | `Handbook*.tsx` | 已覆盖 | 前端需做好 Markdown/公式/图片渲染和搜索体验 |
 | 分数线 | `ScorelinePage.tsx` | 已覆盖 | 动态字段/趋势已有；缺批量导入和复杂筛选优化 |
-| 商城/SVIP | `Store.tsx`、`SvipModal.tsx` | 部分覆盖 | 套餐/订单/权益/激活码、微信支付/支付宝 provider 主链路已有；缺优惠券下单抵扣、订单状态轮询、激活码预检查、退款/对账/补偿任务 |
+| 商城/SVIP | `Store.tsx`、`SvipModal.tsx` | 部分覆盖 | 套餐、订单、订单详情/状态轮询、权益、激活码预检查/兑换、优惠券领取/下单抵扣、微信支付/支付宝 provider 主链路已有；缺退款/对账/补偿任务和前端收银台体验 |
 | 个人中心 | `Profile.tsx` | 部分覆盖 | 基本资料、权益、订单统计、练习历史、学习统计、签到积分、考试倒计时和趋势已有；缺勋章 API、账号绑定/换绑、学习报告可视化 |
 | 资料下载 | `QuestionExporterPublishModal.tsx` 等 | 部分覆盖 | 资源台账/签名下载已有；缺 PDF 预览、水印、防盗链和上传后对象校验 |
 | AI 择校推荐 | 业务规划新增 | 未覆盖 | 需设计学生输入 schema、地区数据上下文、AI JSON 输出、PDF 报告 |
@@ -55,8 +55,8 @@
 | Banner/公告/FAQ/活动 | 已覆盖 | 前端运营后台可以接 |
 | 考试日期/倒计时 | 已覆盖 | 租户后台维护、学生端和公开目录查询已有；前端需展示地区/院校匹配结果 |
 | SVIP 套餐 | 部分覆盖 | 地区/科目/题库范围校验已接入练习/资料/视频；后续补分类/专业增项购买和套餐规则 UI |
-| 优惠券 | 部分覆盖 | 后台配置有；前台兑换、下单抵扣待补 |
-| 激活码 | 已覆盖 | 批次、生成、兑换主链路已有 |
+| 优惠券 | 已覆盖 | 后台配置、前台领取、同用户同券幂等、下单抵扣、全额优惠自动开通权益已有；复杂活动规则和核销报表待补 |
+| 激活码 | 已覆盖 | 批次、生成、预检查、兑换、自用码拒绝、地区校验主链路已有 |
 | 勋章管理 | 部分覆盖 | 表结构有 badges/user_badges；缺后台和学生端 API |
 | 题库录入 | 已覆盖 | 单题创建/更新、JSON 导入、集合/蓝图已有 |
 | 题库导出 PDF/Word/JSON | 未覆盖 | 旧前端有导出组件；新后端需决定服务端导出、导出水印和权限审计 |
@@ -96,14 +96,13 @@
 这些是旧项目中已经出现过、但新后端还没有完整业务闭环的功能：
 
 1. 排行榜增强：刷题、模考、背单词、积分排行榜主接口已有；还需防刷、日/周榜预聚合、运营后台排名看板。
-2. 订单状态轮询和激活码预检查：订单列表和兑换已有，但旧商城体验需要更细的状态查询/预检接口。
-3. 账号设置完整流：头像上传、绑定/更换手机号、微信/QQ 账号合并、密码/邮箱能力。
-4. 题库导出：PDF/Word/JSON 导出、水印、导出审计和权限控制。
-5. 导入扩展：Excel/CSV、分数线、视频批量导入和大批量异步 worker。
-6. 公共题库商业化：平台公共/地区题库披露、租户采纳、套餐授权、版本同步。
-7. CRM/销售结算：真实 CRM worker、轮询/定向分配、分佣规则、结算单、审核和导出。
-8. 题目反馈增强：处理通知、消息提醒、问题聚合统计和内容修复闭环。
-9. 积分活动增强：积分兑换、活动任务、连续签到奖励规则和风控。
+2. 账号设置完整流：头像上传、绑定/更换手机号、微信/QQ 账号合并、密码/邮箱能力。
+3. 题库导出：PDF/Word/JSON 导出、水印、导出审计和权限控制。
+4. 导入扩展：Excel/CSV、分数线、视频批量导入和大批量异步 worker。
+5. 公共题库商业化：平台公共/地区题库披露、租户采纳、套餐授权、版本同步。
+6. CRM/销售结算：真实 CRM worker、轮询/定向分配、分佣规则、结算单、审核和导出。
+7. 题目反馈增强：处理通知、消息提醒、问题聚合统计和内容修复闭环。
+8. 积分活动增强：积分兑换、活动任务、连续签到奖励规则和风控。
 
 ### P0：前端联调到云端前
 
diff --git a/docs/refactor/next-development-todo.md b/docs/refactor/next-development-todo.md
index 7b2b0f10..9b0f407a 100644
--- a/docs/refactor/next-development-todo.md
+++ b/docs/refactor/next-development-todo.md
@@ -8,7 +8,7 @@
 
 - Supabase/PostgreSQL 多租户 schema、RLS、索引、触发器。
 - Node.js API 分层：`core/features`。
-- 学生端核心 API：题库、练习、答题、模考交卷报告、练习历史、学习统计、排行榜、错题复习计划、错题、收藏、背单词、知识手册、分数线、视频播放签名、资料、订单、权益、个人中心、考试倒计时、签到积分、题目反馈。
+- 学生端核心 API：题库、练习、答题、模考交卷报告、练习历史、学习统计、排行榜、错题复习计划、错题、收藏、背单词、知识手册、分数线、视频播放签名、资料、订单详情/状态轮询、优惠券领取/抵扣、激活码预检查/兑换、权益、个人中心、考试倒计时、签到积分、题目反馈。
 - 租户后台 API：品牌、域名、设置、支付账户、登录 provider、私密密钥、活动、考试日期、题目反馈处理、激活码、优惠券、成员权限、审计、内容管理、班级/教师/学生、学生批量导入、批量分班、学生备注、跟进任务。
 - 平台后台 API：租户、SaaS 套餐、订阅、账单、服务费收款、用量。
 - 销售/代理/CRM 增长链路：邀请码、扫码事件、首绑保护、团队、统计、CRM 队列。
@@ -20,6 +20,7 @@
 - 租户组织范围：班级、班级成员、教师/班主任/助教/学生分组，教师按负责班级查看学生，字段权限可脱敏学生手机号。
 - 学生运营管理：学生批量 upsert、禁用/恢复、批量分班、备注、跟进任务已完成接口和集成测试；后续补批量 CRM 推送和自动学习督导。
 - 旧题库运营缺口已补一批：考试日期/倒计时、题目反馈/纠错处理、每日签到积分和积分流水、学习排行榜已完成接口和集成测试。
+- 旧商城体验已补齐主链路：订单详情、订单状态轮询、激活码预检查、自用激活码拒绝、优惠券前台领取、下单抵扣、零元订单自动支付开通权益，且手工支付确认已限制为租户后台 `tenant:payment:write` 权限。
 - 本地验证：`npm run check:refactor` 已通过。
 
 当前更适合进入前端联调前阅读的总览文档：
@@ -86,10 +87,9 @@
    - 已完成排行榜主接口；继续补防刷、日/周榜预聚合和运营后台排名看板。
    - 继续补断点续练和复盘体验。
 
-7. 订单和激活码体验
-   - 补订单详情、订单状态轮询、支付状态刷新。
-   - 补激活码预检查，兑换前展示可用地区、天数、是否绑定代理/销售。
-   - 补优惠券前台兑换和下单抵扣计算。
+7. 订单和营销体验
+   - 已完成订单详情、订单状态轮询、激活码预检查、优惠券前台领取和下单抵扣计算。
+   - 继续补退款、支付补偿任务、对账、异常订单处理、优惠券核销报表和复杂活动规则。
 
 8. 积分和反馈增强
    - 已完成每日签到、积分流水、反馈提交、租户后台处理、奖励积分幂等。
@@ -192,5 +192,5 @@
 2. 云服务器部署 Supabase/PostgreSQL 和 API，配置对象存储生产环境变量，跑 `check:refactor` 的远程等价测试。
 3. 导出现有 PocketBase 数据，做完整 dry-run 迁移。
 4. 开始 `apps/taro`，先接租户解析、首页、题库、背单词、知识手册。
-5. 并行补对象存储、真实登录、支付 adapter。
+5. 并行补对象存储、真实登录、退款对账、CRM worker 和公共题库授权。
 6. 前后端联调通过后，再做支付、权限、数据导入、资料下载、视频播放的商用验收。
diff --git a/docs/refactor/taro-frontend-integration.md b/docs/refactor/taro-frontend-integration.md
index 6528e832..88812a1d 100644
--- a/docs/refactor/taro-frontend-integration.md
+++ b/docs/refactor/taro-frontend-integration.md
@@ -168,9 +168,9 @@ tenant:<tenantId>:theme
 | 知识手册 | `/api/catalog/handbook-subjects`、`handbook-chapters`、`handbook-entries` |
 | 分数线 | `/api/scoreline/fields`、`schools`、`majors`、`records`、`trend`、`years` |
 | 资料下载 | `/api/catalog/assets`、`/api/catalog/assets/download` |
-| 商城 | `/api/catalog/svip-plans`、`POST /api/commerce/orders`、`POST /api/commerce/payments/create` |
-| 订单/权益 | `/api/commerce/orders`、`/api/commerce/entitlements` |
-| 激活码兑换 | `POST /api/commerce/activation-codes/redeem` |
+| 商城 | `/api/catalog/svip-plans`、`POST /api/commerce/coupons/claim`、`POST /api/commerce/orders`、`POST /api/commerce/payments/create` |
+| 订单/权益 | `/api/commerce/orders`、`/api/commerce/orders/detail`、`/api/commerce/orders/status`、`/api/commerce/entitlements` |
+| 激活码 | `POST /api/commerce/activation-codes/check`、`POST /api/commerce/activation-codes/redeem` |
 | 个人中心 | `GET/PATCH /api/profile/me`、`POST /api/profile/check-in`、`GET /api/profile/score-events`、`GET /api/profile/exam-countdowns` |
 | 销售分享 | `/api/referral/resolve`、`track-event`、`bind` |
 | 租户班级 | `GET/PUT /api/tenant-admin/classes`、`POST /api/tenant-admin/classes/disable` |
@@ -597,11 +597,28 @@ body: {
   "quantity": 1,
   "payProvider": "wechat_pay | alipay",
   "payMethod": "jsapi | wap",
+  "regionId": "<regionId>",
+  "couponCode": "<可选，优惠券码>",
+  "couponRedemptionId": "<可选，已领取优惠券 redemptionId>"
+}
+```
+
+前端可以先领取优惠券，再下单：
+
+```text
+POST /api/commerce/coupons/claim
+body: {
+  "code": "<couponCode>",
+  "planId": "<svipPlanId>",
   "regionId": "<regionId>"
 }
 ```
 
-返回 `orderNo` 后，再创建支付参数：
+`coupons/claim` 对同一用户同一优惠券是幂等的；已使用的券会返回 `COUPON_ALREADY_USED`。下单时后端会重新计算套餐原价、优惠金额和最终应付，前端展示金额只能使用接口返回的 `originalAmountCents`、`discountCents`、`amountCents`。
+
+如果优惠后 `amountCents=0`，后端会立即把订单置为 `paid` 并发放权益，前端不要再调用 `payments/create`。
+
+返回未支付 `orderNo` 后，再创建支付参数：
 
 ```text
 POST /api/commerce/payments/create
@@ -634,10 +651,36 @@ H5 可以跳转到该 URL。小程序端如果后续要接支付宝小程序，
 支付完成后前端不要自行开通会员。前端应轮询或重新请求：
 
 ```text
-GET /api/commerce/orders
+GET /api/commerce/orders/status?orderNo=<orderNo>
+GET /api/commerce/orders/detail?orderNo=<orderNo>
 GET /api/commerce/entitlements
 ```
 
+订单详情会返回 `pricing`、`payments`、`items`、`couponRedemptions`，可用于收银台、订单详情页和售后排查。订单状态轮询页只需消费 `status/payment`，避免频繁拉取全量明细。
+
+### 激活码预检查与兑换
+
+兑换前建议先调用：
+
+```text
+POST /api/commerce/activation-codes/check
+body: {
+  "code": "<activationCode>",
+  "regionId": "<regionId>"
+}
+```
+
+可根据返回的 `valid/reasonCode/days/regionName/saleType` 展示确认弹窗。常见 `reasonCode`：
+
+```text
+ACTIVATION_CODE_NOT_FOUND
+ACTIVATION_CODE_USED
+ACTIVATION_CODE_SELF_REDEEM_FORBIDDEN
+ACTIVATION_CODE_REGION_MISMATCH
+```
+
+用户确认后再调用 `POST /api/commerce/activation-codes/redeem`。兑换成功后重新请求 `/api/commerce/entitlements` 和个人中心，不要在前端本地伪造会员状态。
+
 后端支付回调地址由租户支付账户配置：
 
 ```text
@@ -649,6 +692,7 @@ GET /api/commerce/entitlements
 
 - 传入自定义金额。
 - 伪造支付成功状态。
+- 调用 `/api/commerce/payments/manual-confirm`；这个接口只给租户后台线下收款/迁移期使用，后端要求 `tenant:payment:write`。
 - 保存商户号私钥、API v3 key、支付宝应用私钥。
 - 在页面里实现 webhook 验签或权益开通。
 
diff --git a/scripts/api-integration-test.js b/scripts/api-integration-test.js
index 9e40631f..eaca1d80 100644
--- a/scripts/api-integration-test.js
+++ b/scripts/api-integration-test.js
@@ -37,6 +37,8 @@ const ids = {
   question: '00000000-0000-0000-0000-000000000401',
   questionTwo: '00000000-0000-0000-0000-000000000403',
   questionThree: '00000000-0000-0000-0000-000000000405',
+  plan: '00000000-0000-0000-0000-000000000201',
+  couponOnlyPlan: '00000000-0000-0000-0000-000000000202',
   vocabularyUnit: '00000000-0000-0000-0000-000000000811',
   vocabularyWord: '00000000-0000-0000-0000-000000000812',
   video: '00000000-0000-0000-0000-000000000821',
@@ -1142,12 +1144,49 @@ async function testCommerce() {
   const orders = await request('/api/commerce/orders');
   assert.ok(orders.items?.some(item => item.orderNo === 'SMOKE-ORDER-20260621'), 'orders should include smoke order');
 
+  const activationPrecheck = await request('/api/commerce/activation-codes/check', {
+    method: 'POST',
+    body: { code: ' smoke20260621 ', regionId: ids.region },
+  });
+  assert.equal(activationPrecheck.valid, true, 'activation code precheck should validate unused code');
+  assert.equal(activationPrecheck.days, 30, 'activation code precheck should expose granted days');
+  assert.equal(activationPrecheck.regionId, ids.region, 'activation code precheck should expose bound region');
+
+  const selfCodePrecheck = await request('/api/commerce/activation-codes/check', {
+    method: 'POST',
+    body: { code: 'SMOKESELF20260621', regionId: ids.region },
+  });
+  assert.equal(selfCodePrecheck.valid, false, 'self-issued activation code should be invalid for the issuing user');
+  assert.equal(
+    selfCodePrecheck.reasonCode,
+    'ACTIVATION_CODE_SELF_REDEEM_FORBIDDEN',
+    'self-issued activation precheck should expose a stable reason code',
+  );
+
+  const selfCodeRedeem = await request('/api/commerce/activation-codes/redeem', {
+    method: 'POST',
+    body: { code: 'SMOKESELF20260621', regionId: ids.region },
+    expectStatus: 409,
+  });
+  assert.equal(
+    selfCodeRedeem.code,
+    'ACTIVATION_CODE_SELF_REDEEM_FORBIDDEN',
+    'redeeming a self-issued activation code must be blocked',
+  );
+
   const redeemed = await request('/api/commerce/activation-codes/redeem', {
     method: 'POST',
     body: { code: 'SMOKE20260621', regionId: ids.region },
   });
   assert.ok(redeemed.item?.entitlement?.id, 'activation code should grant an entitlement');
 
+  const usedCodePrecheck = await request('/api/commerce/activation-codes/check', {
+    method: 'POST',
+    body: { code: 'SMOKE20260621', regionId: ids.region },
+  });
+  assert.equal(usedCodePrecheck.valid, false, 'activation code precheck should reject used code');
+  assert.equal(usedCodePrecheck.reasonCode, 'ACTIVATION_CODE_USED', 'used activation code should return stable reason code');
+
   const entitlements = await request('/api/commerce/entitlements');
   assert.ok(Array.isArray(entitlements.items), 'entitlements should return a list');
   assert.ok(entitlements.summary && typeof entitlements.summary.isSvip === 'boolean', 'entitlements should include summary');
@@ -1161,6 +1200,151 @@ async function testCommerce() {
   assert.equal(svipPlayback.access?.mode, 'svip', 'SVIP video playback should use svip mode');
   assert.equal(svipPlayback.access?.consumedQuota, 0, 'SVIP video playback should not consume quota');
 
+  const couponOnlyDenied = await request('/api/commerce/orders', {
+    method: 'POST',
+    body: {
+      planId: ids.couponOnlyPlan,
+      payProvider: 'manual',
+      payMethod: 'manual',
+      regionId: ids.region,
+    },
+    expectStatus: 403,
+  });
+  assert.equal(couponOnlyDenied.code, 'PLAN_REQUIRES_COUPON', 'coupon-only plan should require a coupon');
+
+  const claimedCoupon = await request('/api/commerce/coupons/claim', {
+    method: 'POST',
+    body: { code: 'SMOKE50', planId: ids.couponOnlyPlan, regionId: ids.region },
+  });
+  assert.equal(claimedCoupon.valid, true, 'coupon claim should be valid');
+  assert.equal(claimedCoupon.idempotent, false, 'first coupon claim should create a redemption');
+  assert.equal(claimedCoupon.coupon?.discountCents, 500, 'coupon claim should calculate 50% discount');
+
+  const claimedCouponAgain = await request('/api/commerce/coupons/claim', {
+    method: 'POST',
+    body: { code: 'SMOKE50', planId: ids.couponOnlyPlan, regionId: ids.region },
+  });
+  assert.equal(claimedCouponAgain.idempotent, true, 'second coupon claim should be idempotent');
+  assert.equal(
+    claimedCouponAgain.redemption?.id,
+    claimedCoupon.redemption?.id,
+    'idempotent coupon claim should return the original redemption',
+  );
+
+  const discountedOrder = await request('/api/commerce/orders', {
+    method: 'POST',
+    body: {
+      planId: ids.couponOnlyPlan,
+      payProvider: 'manual',
+      payMethod: 'manual',
+      regionId: ids.region,
+      couponRedemptionId: claimedCoupon.redemption.id,
+    },
+  });
+  assert.equal(discountedOrder.item?.originalAmountCents, 1000, 'discounted order should use server-side plan price');
+  assert.equal(discountedOrder.item?.discountCents, 500, 'discounted order should apply claimed coupon');
+  assert.equal(discountedOrder.item?.amountCents, 500, 'discounted order payable amount should be 500 cents');
+  assert.equal(discountedOrder.item?.status, 'pending', 'partially discounted order should remain pending');
+
+  const discountedDetail = await request('/api/commerce/orders/detail', {
+    query: { orderNo: discountedOrder.item.orderNo },
+  });
+  assert.equal(discountedDetail.item?.pricing?.discountCents, 500, 'order detail should expose pricing snapshot');
+  assert.ok(
+    discountedDetail.item?.items?.some(item => item.itemType === 'coupon_discount' && item.totalAmountCents === -500),
+    'order detail should include a negative coupon order item',
+  );
+  assert.ok(
+    discountedDetail.item?.couponRedemptions?.some(item => item.status === 'used' && item.discountAppliedCents === 500),
+    'order detail should include used coupon redemption',
+  );
+
+  const discountedStatus = await request('/api/commerce/orders/status', {
+    query: { orderNo: discountedOrder.item.orderNo },
+  });
+  assert.equal(discountedStatus.item?.status, 'pending', 'order status endpoint should return pending status');
+  assert.equal(discountedStatus.item?.payment?.status, 'pending', 'order status endpoint should include latest payment');
+
+  const studentManualConfirmDenied = await request('/api/commerce/payments/manual-confirm', {
+    method: 'POST',
+    body: { orderNo: discountedOrder.item.orderNo, amountCents: discountedOrder.item.amountCents },
+    expectStatus: 403,
+  });
+  assert.equal(
+    studentManualConfirmDenied.code,
+    'TENANT_ADMIN_REQUIRED',
+    'student must not manually confirm commerce payments',
+  );
+
+  const manualConfirmed = await request('/api/commerce/payments/manual-confirm', {
+    userId: TENANT_ADMIN_USER_ID,
+    method: 'POST',
+    body: {
+      orderNo: discountedOrder.item.orderNo,
+      amountCents: discountedOrder.item.amountCents,
+      providerTradeNo: `manual-${discountedOrder.item.orderNo}`,
+    },
+  });
+  assert.equal(manualConfirmed.item?.status, 'paid', 'tenant admin should manually confirm discounted order');
+  assert.equal(manualConfirmed.item?.confirmedBy, TENANT_ADMIN_USER_ID, 'manual confirmation should record operator');
+  assert.ok(manualConfirmed.item?.entitlement?.id, 'manual confirmation should grant entitlement');
+
+  const manualConfirmedAgain = await request('/api/commerce/payments/manual-confirm', {
+    userId: TENANT_ADMIN_USER_ID,
+    method: 'POST',
+    body: {
+      orderNo: discountedOrder.item.orderNo,
+      amountCents: discountedOrder.item.amountCents,
+      providerTradeNo: `manual-${discountedOrder.item.orderNo}`,
+    },
+  });
+  assert.equal(manualConfirmedAgain.item?.idempotent, true, 'duplicate manual confirmation should be idempotent');
+
+  const usedCouponClaim = await request('/api/commerce/coupons/claim', {
+    method: 'POST',
+    body: { code: 'SMOKE50', planId: ids.couponOnlyPlan, regionId: ids.region },
+    expectStatus: 409,
+  });
+  assert.equal(usedCouponClaim.code, 'COUPON_ALREADY_USED', 'used coupon should not be claimable again by same user');
+
+  const freeOrder = await request('/api/commerce/orders', {
+    method: 'POST',
+    body: {
+      planId: ids.couponOnlyPlan,
+      payProvider: 'manual',
+      payMethod: 'manual',
+      regionId: ids.region,
+      couponCode: 'SMOKEFREE',
+    },
+  });
+  assert.equal(freeOrder.item?.originalAmountCents, 1000, 'free order should still keep original server price');
+  assert.equal(freeOrder.item?.discountCents, 1000, 'free coupon should discount the full amount');
+  assert.equal(freeOrder.item?.amountCents, 0, 'free order payable amount should be zero');
+  assert.equal(freeOrder.item?.status, 'paid', 'zero-amount order should be marked paid immediately');
+  assert.ok(freeOrder.item?.tradeNo?.startsWith('zero-'), 'zero-amount order should get an internal trade number');
+  assert.ok(freeOrder.item?.entitlement?.id, 'zero-amount order should grant entitlement immediately');
+
+  const freeStatus = await request('/api/commerce/orders/status', {
+    query: { orderNo: freeOrder.item.orderNo },
+  });
+  assert.equal(freeStatus.item?.status, 'paid', 'zero-amount order status should be paid');
+  assert.equal(freeStatus.item?.payment?.status, 'paid', 'zero-amount order payment row should be paid');
+  assert.equal(freeStatus.item?.payment?.amountCents, 0, 'zero-amount order payment row should have zero amount');
+
+  const freePaymentDenied = await request('/api/commerce/payments/create', {
+    method: 'POST',
+    body: { orderNo: freeOrder.item.orderNo, provider: 'manual' },
+    expectStatus: 409,
+  });
+  assert.equal(freePaymentDenied.code, 'ORDER_ALREADY_PAID', 'paid zero-amount order should not create another payment');
+
+  const crossTenantOrderDetail = await request('/api/commerce/orders/detail', {
+    tenantId: PARTNER_TENANT_ID,
+    query: { orderNo: freeOrder.item.orderNo },
+    expectStatus: 404,
+  });
+  assert.equal(crossTenantOrderDetail.code, 'ORDER_NOT_FOUND', 'order detail must be tenant isolated');
+
   const fakeWechatPay = await startFakeWechatPayServer();
   const wechatAccount = await request('/api/tenant-admin/payment-accounts', {
     userId: TENANT_ADMIN_USER_ID,
@@ -1192,7 +1376,7 @@ async function testCommerce() {
   const wechatOrder = await request('/api/commerce/orders', {
     method: 'POST',
     body: {
-      planId: '00000000-0000-0000-0000-000000000201',
+      planId: ids.plan,
       payProvider: 'wechat_pay',
       payMethod: 'jsapi',
       regionId: ids.region,
@@ -1286,7 +1470,7 @@ async function testCommerce() {
   const alipayOrder = await request('/api/commerce/orders', {
     method: 'POST',
     body: {
-      planId: '00000000-0000-0000-0000-000000000201',
+      planId: ids.plan,
       payProvider: 'alipay',
       payMethod: 'wap',
       regionId: ids.region,
diff --git a/scripts/smoke-seed.js b/scripts/smoke-seed.js
index 42744b60..540c3f2b 100644
--- a/scripts/smoke-seed.js
+++ b/scripts/smoke-seed.js
@@ -45,9 +45,13 @@ const ids = {
   questionThree: '00000000-0000-0000-0000-000000000405',
   questionThreeVersion: '00000000-0000-0000-0000-000000000406',
   plan: '00000000-0000-0000-0000-000000000201',
+  couponOnlyPlan: '00000000-0000-0000-0000-000000000202',
+  checkoutCoupon: '00000000-0000-0000-0000-000000000203',
+  freeCheckoutCoupon: '00000000-0000-0000-0000-000000000204',
   order: '00000000-0000-0000-0000-000000000701',
   payment: '00000000-0000-0000-0000-000000000702',
   activationCode: '00000000-0000-0000-0000-000000000801',
+  selfActivationCode: '00000000-0000-0000-0000-000000000802',
   vocabularyUnit: '00000000-0000-0000-0000-000000000811',
   vocabularyWord: '00000000-0000-0000-0000-000000000812',
   vocabularyWordTwo: '00000000-0000-0000-0000-000000000813',
@@ -163,6 +167,93 @@ async function main() {
       [tenantId, ids.leaderboardSessionUser, ids.leaderboardSessionSecond],
     );
 
+    const checkoutCouponCodes = ['SMOKE50', 'SMOKEFREE'];
+
+    await client.query(
+      `
+      delete from public.coupon_redemptions
+      where tenant_id = $1
+        and (
+          coupon_id = any($2::uuid[])
+          or coupon_code = any($3::text[])
+          or order_id in (
+            select id from public.orders
+            where tenant_id = $1
+              and (raw_payload->'pricing'->>'couponCode') = any($3::text[])
+          )
+        )
+      `,
+      [tenantId, [ids.checkoutCoupon, ids.freeCheckoutCoupon], checkoutCouponCodes],
+    );
+
+    await client.query(
+      `
+      delete from public.order_items
+      where tenant_id = $1
+        and order_id in (
+          select id from public.orders
+          where tenant_id = $1
+            and (raw_payload->'pricing'->>'couponCode') = any($2::text[])
+        )
+      `,
+      [tenantId, checkoutCouponCodes],
+    );
+
+    await client.query(
+      `
+      delete from public.entitlements
+      where tenant_id = $1
+        and user_id = $2::uuid
+        and source_type in ('order', 'activation_code')
+        and (
+          legacy_source_id in ('SMOKE20260621', 'SMOKESELF20260621')
+          or source_id in (
+            select id
+            from public.orders
+            where tenant_id = $1
+              and (
+                raw_payload->'pricing'->>'couponCode' = any($3::text[])
+                or order_no like 'SVIP%'
+                or order_no like 'XP%'
+              )
+          )
+          or metadata->>'orderNo' like 'SVIP%'
+          or metadata->>'orderNo' like 'XP%'
+        )
+      `,
+      [tenantId, ids.user, checkoutCouponCodes],
+    );
+
+    await client.query(
+      `
+      delete from public.payments
+      where tenant_id = $1
+        and order_id in (
+          select id from public.orders
+          where tenant_id = $1
+            and (
+              (raw_payload->'pricing'->>'couponCode') = any($2::text[])
+              or order_no like 'SVIP%'
+              or order_no like 'XP%'
+            )
+        )
+      `,
+      [tenantId, checkoutCouponCodes],
+    );
+
+    await client.query(
+      `
+      delete from public.orders
+      where tenant_id = $1
+        and (
+          (raw_payload->'pricing'->>'couponCode') = any($2::text[])
+          or order_no like 'SVIP%'
+          or order_no like 'XP%'
+        )
+      `,
+      [tenantId, checkoutCouponCodes],
+    );
+
     await client.query(
       `
       delete from public.crm_webhook_queue
@@ -1193,6 +1284,62 @@ async function main() {
       [ids.plan, tenantId, ids.region],
     );
 
+    await client.query(
+      `
+      insert into public.svip_plans (
+        id, tenant_id, region_id, legacy_id, name, price_cents, original_price_cents,
+        days, description, per_day_label, badge, recommended, coupon_only, sort_order, is_active
+      )
+      values (
+        $1, $2, $3, 'smoke-coupon-plan', '烟测优惠券专享月卡', 1000, 2000,
+        30, '本地 smoke 优惠券专享套餐', '0.33/天', 'COUPON', false, true, 2, true
+      )
+      on conflict (id)
+      do update set name = excluded.name,
+                    price_cents = excluded.price_cents,
+                    original_price_cents = excluded.original_price_cents,
+                    days = excluded.days,
+                    region_id = excluded.region_id,
+                    coupon_only = excluded.coupon_only,
+                    is_active = true,
+                    updated_at = now()
+      `,
+      [ids.couponOnlyPlan, tenantId, ids.region],
+    );
+
+    await client.query(
+      `
+      insert into public.coupons (
+        id, tenant_id, legacy_id, code, plan_id, discount_type, discount_value,
+        valid_from, valid_to, max_uses, used_count, source, remark
+      )
+      values
+        (
+          $1, $2, 'smoke-coupon', 'SMOKE50', $3, 'percent', 50,
+          now() - interval '1 day', now() + interval '30 days', 100, 0,
+          'smoke', '本地 smoke 优惠券'
+        ),
+        (
+          $4, $2, 'smoke-free-coupon', 'SMOKEFREE', $3, 'percent', 100,
+          now() - interval '1 day', now() + interval '30 days', 100, 0,
+          'smoke', '本地 smoke 全额优惠券'
+        )
+      on conflict (id)
+      do update set code = excluded.code,
+                    plan_id = excluded.plan_id,
+                    discount_type = excluded.discount_type,
+                    discount_value = excluded.discount_value,
+                    valid_from = excluded.valid_from,
+                    valid_to = excluded.valid_to,
+                    max_uses = excluded.max_uses,
+                    used_count = 0,
+                    source = excluded.source,
+                    remark = excluded.remark,
+                    updated_at = now()
+      `,
+      [ids.checkoutCoupon, tenantId, ids.couponOnlyPlan, ids.freeCheckoutCoupon],
+    );
+
     await client.query(
       `
       insert into public.orders (
@@ -1238,6 +1385,24 @@ async function main() {
       [ids.activationCode, tenantId, ids.region],
     );
 
+    await client.query(
+      `
+      insert into public.activation_codes (
+        id, tenant_id, legacy_id, code, days, is_used, agent_user_id,
+        sale_type, unit_price_cents, used_region_id, remark
+      )
+      values ($1, $2, 'smoke-self-code', 'SMOKESELF20260621', 30, false, $3, 'sales', 0, $4, '不可自用的 smoke 激活码')
+      on conflict (id)
+      do update set is_used = false,
+                    used_by = null,
+                    used_at = null,
+                    agent_user_id = excluded.agent_user_id,
+                    used_region_id = excluded.used_region_id,
+                    updated_at = now()
+      `,
+      [ids.selfActivationCode, tenantId, ids.user, ids.region],
+    );
+
     await client.query(
       `
       insert into public.vocabulary_units (
diff --git a/supabase/migrations/202606290006_commerce_checkout_experience.sql b/supabase/migrations/202606290006_commerce_checkout_experience.sql
new file mode 100644
index 00000000..14b27033
--- /dev/null
+++ b/supabase/migrations/202606290006_commerce_checkout_experience.sql
@@ -0,0 +1,13 @@
+create unique index if not exists idx_coupon_redemptions_user_coupon_once
+  on public.coupon_redemptions(tenant_id, user_id, coupon_id)
+  where coupon_id is not null;
+
+create index if not exists idx_coupon_redemptions_order_user
+  on public.coupon_redemptions(tenant_id, order_id, user_id)
+  where order_id is not null;
+
+create index if not exists idx_payments_order_updated
+  on public.payments(tenant_id, order_id, updated_at desc);
+
+create index if not exists idx_order_items_order
+  on public.order_items(tenant_id, order_id);