bug: transparency for mini.notify not present.

[231tr0n]

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Neovim version (nvim -v)

v0.10.0-dev-3117+g4e5c633ed

Operating system/version

Ubuntu 24.04 WSL

Describe the bug

Transparency for mini.notify notifications are not present as they were for nvim-notify.

Steps To Reproduce

Install tokyonight.nvim and mini.notify with any package manager.

require("tokyonight").setup({
	style = "night", -- The theme comes in three styles, `storm`, `moon`, a darker variant `night` and `day`
	light_style = "day", -- The theme is used when the background is set to light
	transparent = true,
	terminal_colors = true,
	styles = {
		comments = { italic = true },
		keywords = { italic = true },
		functions = {},
		variables = {},
		sidebars = "transparent",
		floats = "transparent",
	},
	sidebars = { "qf", "help" },
	day_brightness = 0.3,
	hide_inactive_statusline = true,
	dim_inactive = true,
	lualine_bold = false,
})
require("mini.notify").setup({
	window = {
		max_width_share = 0.5,
		-- winblend = 100,
	},
})
vim.notify = MiniNotify.make_notify()

You can see that notifications for mini.notify are not transparent.

Expected Behavior

The notification background was expected to be transparent like above but it does not for nvim-notify like below

Repro

-- DO NOT change the paths and don't remove the colorscheme
local root = vim.fn.fnamemodify("./.repro", ":p")

-- set stdpaths to use .repro
for _, name in ipairs({ "config", "data", "state", "cache" }) do
	vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
	vim.fn.system({ "git", "clone", "--filter=blob:none", "https://github.com/folke/lazy.nvim.git", lazypath })
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
	"folke/tokyonight.nvim",
	"echasnovski/mini.notify",
	-- add any other plugins here
}
require("lazy").setup(plugins, {
	root = root .. "/plugins",
})

require("tokyonight").setup({
	style = "night", -- The theme comes in three styles, `storm`, `moon`, a darker variant `night` and `day`
	light_style = "day", -- The theme is used when the background is set to light
	transparent = true,
	terminal_colors = true,
	styles = {
		comments = { italic = true },
		keywords = { italic = true },
		functions = {},
		variables = {},
		sidebars = "transparent",
		floats = "transparent",
	},
	sidebars = { "qf", "help" },
	day_brightness = 0.3,
	hide_inactive_statusline = true,
	dim_inactive = true,
	lualine_bold = false,
})
require("mini.notify").setup({
	window = {
		max_width_share = 0.5,
		winblend = 0,
	},
})
vim.notify = MiniNotify.make_notify()

vim.cmd.colorscheme("tokyonight")
-- add anything else here