fix(security): 安全闸门与 NODE_ENV 解耦，支付/提现 fail-closed

- 新增 SECURE_MODE（仅 ALLOW_INSECURE_DEV_AUTH=1 时放开）：后台登录口令、上传、内容检测、核销码归属全部改为默认收紧，修复线上以 NODE_ENV=development 运行时闸门失效

- 提现审核：未开通真实转账且未显式 ALLOW_SANDBOX_PAY=1 时一律 503，杜绝只改状态不打款

- 预支付：未开启沙箱时不再下发沙箱参数；小程序删除预支付失败伪造沙箱成功的兜底，改为抛错

- 订阅消息支持 MINIPROGRAM_STATE=formal|trial|developer 显式配置，避免真实用户收不到通知

- 动态列表/点赞身份统一 normalizeUserId；文档补充安全闸门与订阅消息环境变量

- 109 套件/720 用例全绿，tsc 构建通过

pwuniapp/common/api.js

@@ -451,7 +451,7 @@ export async function universalVerifyCheckin(code, operatorId) {
  */
 export async function getPosts(category, userId) {
   try {
-    const uid = userId || uni.getStorageSync('userId') || 1001;
+    const uid = normalizeUserId(userId);
     let query = `?userId=${uid}`;
     if (category && category !== 'all') {
       query += `&category=${encodeURIComponent(category)}`;
@@ -519,7 +519,7 @@ export async function createPost(payload) {
  */
 export async function likePost(id, action, userId) {
   try {
-    const uid = userId || uni.getStorageSync('userId') || 1001;
+    const uid = normalizeUserId(userId);
     const payload = { userId: uid };
     if (action) {
       payload.action = action;
@@ -1437,16 +1437,12 @@ export async function requestWechatPayment({ amount, title = '同城陪伴担保
       userId: uid,
       wxCode
     });
-  } catch (_) {
-    prepayData = {
-      mode: 'SANDBOX',
-      timeStamp: String(Math.floor(Date.now() / 1000)),
-      nonceStr: `pw_${Date.now()}`,
-      package: `prepay_id=wx${Date.now()}`,
-      signType: 'RSA',
-      paySign: 'SANDBOX_FALLBACK',
-      outTradeNo: orderId || `WX_${Date.now()}`
-    };
+  } catch (err) {
+    // 预支付失败必须向上抛出：绝不能伪造"沙箱支付成功"，否则用户以为付款成功、订单却未支付。
+    const e = new Error((err && err.message) || '微信支付发起失败，请稍后重试');
+    e.code = err && err.code;
+    e.statusCode = err && err.statusCode;
+    throw e;
   }
 
   return new Promise((resolve, reject) => {