After attaching ext_messages, 'cmdheight' is set to zero for current tabpage only

[Sam-programs]

Problem

After attaching ext_messages, 'cmdheight' is set to zero for current tabpage only. And When switching to other tabpages, The statusline becomes duplicated (one on the bottom row and one above that).

Ref folke/noice.nvim#775

Steps to reproduce

nvim --clean -u minimal.lua

-- minimal.lua
vim.cmd("tabnew")
vim.ui_attach(vim.api.nvim_create_namespace("a"), { ext_messages = true }, function() end)
vim.schedule(function()
    vim.cmd("tabNext")
end)

Expected behavior

When attaching ext_messages 'cmdheight' is set to 0 in every tab.

Context:
This is the code for setting 'cmdheight'.

neovim/src/nvim/ui.c

Lines 231 to 234 in 6888607

	if (i == kUIMessages && !ui_ext[i] && ext_widgets[i]) {
	set_option_value(kOptCmdheight, NUMBER_OPTVAL(0), 0);
	command_height();
	}

neovim/src/nvim/option.c

Lines 174 to 178 in 6888607

	void set_init_tablocal(void)
	{
	// susy baka: cmdheight calls itself OPT_GLOBAL but is really tablocal!
	p_ch = options[kOptCmdheight].def_val.number;
	}

Neovim version (nvim -v)

current master (https://github.com/neovim/neovim/commits/688860741589b4583129e426f4df0523f9213275))

Vim (not Nvim) behaves the same?

No external ui in vim.

Operating system/version

Linux ArchLinux 6.8.1-arch1-1

Terminal name/version

wezterm 20240203-110809-5046fc22

$TERM environment variable

wezterm

Installation

make on master

[luukvbaal]

Thanks for the clear repro steps, #28522 should fix this.