fix: resolve header overlap on Dynamic Island iPhones

- app.js 通过 wx.getSystemInfoSync 获取 statusBarHeight 存入 globalData
- 所有12个自定义导航页面的 JS 读取 statusBarHeight
- WXML 通过 style="padding-top: {{statusBarHeight + 24}}px" 动态适配
- 普通手机和灵动岛手机都能正确显示

miniprogram/pages/subscribe-prompt/subscribe-prompt.js

@@ -1,5 +1,12 @@
 Page({
-  data: {},
+  data: {
+    statusBarHeight: 44
+  },
+
+  onLoad: function () {
+    var app = getApp()
+    this.setData({ statusBarHeight: app.globalData.statusBarHeight })
+  },
 
   onViewPlans: function () {
     wx.navigateTo({ url: '/pages/subscribe-plans/subscribe-plans' })