fix: Scroll Issue with '.app-wrapper' overflow

[ljt990218]

.app-wrapper {
  ...
  height: 100%;
  ...
}

'.app-wrappe' 的高度是 100%，导致首页会产生滚动，个人觉得不产生滚动体验更好。

.app-wrapper {
  ...
  height: calc(100% - 46px);
  ...
}

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[CharleeWa]

谢谢！我觉得挺好的。为什么关闭了？