Neovim, switch colorscheme preserving underline on links, highlights, and formatting

colorscheme_autocms.lua

-- After changing colorscheme, Neovim wipes syntax highlights and conceal rules.
-- This re-runs filetype syntax and restores conceal settings if they were in use.
-- Prevents broken link formatting and visible markdown/tutor syntax.

vim.api.nvim_create_autocmd('ColorScheme', {
  pattern = '*',
  callback = function()
    local win = vim.api.nvim_get_current_win()
    local conceallevel = vim.wo[win].conceallevel
    local concealcursor = vim.wo[win].concealcursor
    local ft = vim.bo.filetype

    if ft ~= '' then
      vim.cmd('doautocmd Syntax ' .. ft)
    end

    if conceallevel > 0 then
      vim.schedule(function()
        vim.wo[win].conceallevel = conceallevel
        vim.wo[win].concealcursor = concealcursor
      end)
    end
  end,
})