gum input header flags can output an incorrect render

[ndsizeif]

Describe the bug
Setting some of the header properties of gum input including, --header.align and --header.height, can cause rendering over subsequent lines of the output.

To Reproduce
This simple bash script sets a header and aligns it inside a border.

#!/bin/bash

term_width=$(tput cols)
WIDTH=$((term_width / 2))

gum input \
	--header="example header" \
	--header.width=$WIDTH \
	--header.align="center" \
	--header.border="thick"

Using a border makes the behavior apparent, but output is also affected without a border. Setting header height to more than 2 obscures the placeholder.

gum input \
	--header="example header" \
	--header.height="4"

Expected behavior
The above commands should render as they do using gum v0.13.0

gum version 0.14.0 (295a671)

Description:    Manjaro Linux
Release:        24.0.0
Codename:       Wynsdey

[caarlos0]

this should be fixed by #634

[ndsizeif]

Thanks for working on this @caarlos0.

I just wanted to report behavior of some scripts using commit 96448e0

The scripts without any type of border now work as expected. Thanks for the fix.

gum input \
	--header="example header"

The scripts with a border will have the input line obscured

gum input \
	--header="example header"
	--header.border="thick"

gum v0.13.0

96448e0

[caarlos0]

good find, seems to be related to the height, not sure how yet, though

[caarlos0]

should be fixed on main!