feat: 存储空间管理、虚拟支付接入与容量守卫

- 新增存储空间管理：会员套餐配置、用户容量/到期管理、后台支付记录查询
- 接入个人主体小程序虚拟支付：下单/发货推送/兜底查单(query_order)
- 修复 adminStorageUsers 等接口鉴权、out_trade_no 长度、前端 requestVirtualPayment 参数
- 前端上传前容量预检，超容引导升级无限空间
- 我的页会员卡片展示「无限空间」与已用容量/到期时间
- 后台「存储空间管理」新增支付记录标签页

weapp/pages/settings/settings.js

@@ -2,6 +2,7 @@ const { getLayout } = require('../../utils/layout');
 // pages/settings/settings.js
 const { api, getImageUrl, API_BASE, uploadFileCompat } = require('../../utils/request');
 const { requestSubscribe, getSubscribeStatus } = require('../../utils/subscribe');
+const { guardStorageSpace } = require('../../utils/storage-guard');
 Page({
   onResize: function() { this.setData(getLayout()); },
   data: {
@@ -196,10 +197,13 @@ Page({
   },
   chooseBgImage: function() {
     var self = this;
-    wx.chooseImage({ count: 1, sizeType: ['compressed'], sourceType: ['album'],
-      success: function(res) {
-        self.setData({ bgPreview: res.tempFilePaths[0], bgFilePath: res.tempFilePaths[0] });
-      }
+    guardStorageSpace(0).then(function(ok) {
+      if (!ok) return;
+      wx.chooseImage({ count: 1, sizeType: ['compressed'], sourceType: ['album'],
+        success: function(res) {
+          self.setData({ bgPreview: res.tempFilePaths[0], bgFilePath: res.tempFilePaths[0] });
+        }
+      });
     });
   },
   saveBgImage: async function() {