feat(order): 订单超时自动流转改为后台定时任务

- 新增 startOrderTimeoutScheduler：默认每 60s 扫描（ORDER_TIMEOUT_SCAN_MS 可配，DISABLE_ORDER_TIMEOUT_SCAN=1 可禁用），带防重入与 unref

- 启动时自动开启；移除订单查询接口里的被动扫描，避免每次请求触发

- 文档补充定时扫描环境变量；新增回归护栏 order-timeout-scheduler.spec.ts（83 套件/622 用例全绿）

server/src/db/repository.ts

@@ -1297,7 +1297,7 @@ export class MysqlRepository {
 
   // 订单相关
   async getOrders(): Promise<any[]> {
-    await this.processOrderTimeouts().catch(() => {});
+    // 订单超时自动流转统一由后台定时任务处理（见 index.ts startOrderTimeoutScheduler）
     const [rows]: any = await pool.query(`
       SELECT 
         id, 
@@ -1335,7 +1335,7 @@ export class MysqlRepository {
    */
   async getOrdersForUser(userId: number): Promise<any[]> {
     const uid = Number(userId) || 0;
-    await this.processOrderTimeouts().catch(() => {});
+    // 订单超时自动流转统一由后台定时任务处理（见 index.ts startOrderTimeoutScheduler）
     const [rows]: any = await pool.query(`
       SELECT 
         id, 

server/src/index.ts

@@ -4307,6 +4307,40 @@ async function logStartupConfigSelfCheck(): Promise<void> {
   }
 }
 
+// 订单超时自动流转定时任务：定期扫描并处理「超时未支付取消 / 超时未接单退款 / 48小时自动完成结算」
+const ORDER_TIMEOUT_SCAN_MS = Number(process.env.ORDER_TIMEOUT_SCAN_MS || 60000);
+let orderTimeoutTimer: NodeJS.Timeout | null = null;
+let orderTimeoutRunning = false;
+
+function startOrderTimeoutScheduler(): void {
+  if (process.env.DISABLE_ORDER_TIMEOUT_SCAN === '1') {
+    console.log('[Peiwan Scheduler] 订单超时扫描已禁用 (DISABLE_ORDER_TIMEOUT_SCAN=1)');
+    return;
+  }
+  if (orderTimeoutTimer) return;
+  const intervalMs = Number.isFinite(ORDER_TIMEOUT_SCAN_MS) ? Math.max(1000, ORDER_TIMEOUT_SCAN_MS) : 60000;
+  orderTimeoutTimer = setInterval(async () => {
+    if (orderTimeoutRunning) return; // 防重入：上一轮未结束则跳过本轮
+    orderTimeoutRunning = true;
+    try {
+      const r = await repo.processOrderTimeouts();
+      if (r && (r.cancelledCount || r.refundedCount || r.completedCount)) {
+        console.log(
+          `[Peiwan Scheduler] 订单超时扫描: 取消 ${r.cancelledCount} / 退款 ${r.refundedCount} / 完成结算 ${r.completedCount}`
+        );
+      }
+    } catch (e) {
+      logServerError('orderTimeoutScheduler', e);
+    } finally {
+      orderTimeoutRunning = false;
+    }
+  }, intervalMs);
+  if (typeof (orderTimeoutTimer as any).unref === 'function') {
+    (orderTimeoutTimer as any).unref();
+  }
+  console.log(`[Peiwan Scheduler] 订单超时扫描已启动，间隔 ${Math.round(intervalMs / 1000)}s`);
+}
+
 async function bootstrap() {
   try {
     await initDatabase();
@@ -4323,6 +4357,7 @@ async function bootstrap() {
   }
 
   await logStartupConfigSelfCheck();
+  startOrderTimeoutScheduler();
 
   app.listen(port, () => {
     console.log(`[Peiwan Server] HTTP server is running on http://localhost:${port}`);