fix: Style loss when taking screenshots

[ZhengIce]

fix：

• Incomplete display of border style when taking screenshots

[zyc9012]

Wireframes are missing

[ZhengIce]

@zyc9012 By default, there is no border on the edge. What do you mean is that when taking screenshots, the border on the edge should also be added to display it

[zyc9012]

@ZhengIce. Top and left border are not rendered for cell area because they are taken by row header bottom line and column header right line. But in screenshot we need to add them back. In case it overrides the manually set borders, you can try to draw it along with other default borders (or wireframe) to see if it affects anything visually.

[ZhengIce]

Okay, I will study it further.