Skeleton will be removed when Vue root is mounted, however, ajax data has not yet been acquired.

### Description
采取将骨架屏预先插入html中的骨架屏方案，那骨架屏在Vue根实例挂载完就消失，但是，此时ajax的数据还没获取到，这样会导致一小段时间的白屏，这里有什么方案解决呢。

No files, tests, or entry points are identified. Reproduce the timing between Vue root mounting and AJAX completion in a generated skeleton page, then inspect the plugin's generated HTML and lifecycle behavior; done means the skeleton does not disappear before the data-backed page is ready, avoiding the reported blank interval.

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