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/login/login.js

@@ -2,9 +2,15 @@ var app = getApp()
 
 Page({
   data: {
+    statusBarHeight: 44,
     loading: false
   },
 
+  onLoad: function () {
+    var app = getApp()
+    this.setData({ statusBarHeight: app.globalData.statusBarHeight })
+  },
+
   onLogin: function () {
     var self = this
     self.setData({ loading: true })