2.4 Picker的深色模式好丑，是bug还就是这样的？

[SupZ6]

[BearJ]

@heii 的确是bug，目前可以先加上这段css来fix：

@media (prefers-color-scheme: dark) {
  body:not([data-weui-theme='light']) .weui-picker__mask {
    background-image: linear-gradient(180deg, rgba(25, 25, 25, 0.95), rgba(25, 25, 25, 0.6)), linear-gradient(0deg, rgba(25, 25, 25, 0.95), rgba(25, 25, 25, 0.6));
  }
}