Complex input method text rendering issue

[qvacua]

https://twitter.com/tzwm/status/1505113417342132232

[SolaWing]

it's in expected. because prerender inline text not consider the inner split window. it's not actually interfare input since it‘s not actually touch vim buffer. it's same as Terminal.app's behaviour.

if the prerender should consider vim window, it's also need to handle overflow, like auto scroll or wrap, it's more complicated.