bug(explorer): Blank lines at the bottom of explorer when auto_hide = { "input" }

[georgeguimaraes]

Did you check docs and existing issues?

• I have read all the snacks.nvim docs
• I have updated the plugin to the latest version before submitting this issue
• I have searched the existing issues of snacks.nvim
• I have searched the existing issues of plugins related to this issue

Neovim version (nvim -v)

v0.11.0-dev-4985+g56fabcadb6-Homebrew

Operating system/version

MacOS 15.3.1

Describe the bug

When I have

						explorer = {
							layout = {
								auto_hide = { "input" },
							},

The explorer keeps some lines blank at the bottom (see the attached image), even if there's files to be displayed there (you can keep scrolling)

Steps To Reproduce

1. Open Snacks.explorer()
2. Open a lot of dirs to have enough files to fill the list

Expected Behavior

no blank lines at the bottom.

Repro

vim.env.LAZY_STDPATH = ".repro"
load(vim.fn.system("curl -s https://raw.githubusercontent.com/folke/lazy.nvim/main/bootstrap.lua"))()

require("lazy.minit").repro({
	spec = {
		{ "LazyVim/LazyVim", import = "lazyvim.plugins" },
		{
			"folke/snacks.nvim",
			opts = {
				image = {},
				picker = {
					formatters = {
						file = {
							truncate = 70,
						},
					},
					sources = {
						files = { hidden = true },
						explorer = {
							layout = {
								auto_hide = { "input" },
							},
						},
					},
				},
			},
		},
	},
})