Not working in embedded template files (go-templ, neovim)

[twschum]

Explain the issue

1. Neovim with treesitter integration. templ installed as a treesitter ensure_installed filetype.
2. go-templ file, builtin textobjects for tags, like vit work, but the expected highlighting and % objects don't get attached.
3. Highlighting and objects should be available in embedded html.
4. Using % objects in the following file instead go to the go langauge blocks delineated by {}. I compared the inner html in it's own html file, and treesitter is marking up the inner html just fine (within the component_block)

If your issue is instead a feature request or anything else, please consider if minimal examples and vimrc files might still be relevant.

Minimal working example

.templ file

package page

templ navbar(currentPage string) {
<div class="navbar bg-base-100">
    <div class="navbar-start">
        <a class="btn btn-ghost text-xl">{ currentPage }</a>
    </div>
    <div class="navbar-center hidden lg:flex">
        <ul class="menu menu-horizontal px-1">
            <li><a>Item 1</a></li>
            <li><a>Item 2</a></li>
        </ul>
    </div>
    <div class="navbar-end">
        <a class="btn">Button</a>
    </div>
</div>
}

Treesitter playground identifying the embedded html:

component_declaration [2, 0] - [17, 1]
  name: component_identifier [2, 6] - [2, 12]
  parameter_list [2, 12] - [2, 32]
    parameter_declaration [2, 13] - [2, 31]
      name: identifier [2, 13] - [2, 24]
      type: type_identifier [2, 25] - [2, 31]
  component_block [2, 33] - [17, 1]
    element [3, 0] - [16, 6]
      tag_start [3, 0] - [3, 32]
        name: element_identifier [3, 1] - [3, 4]
        attribute [3, 5] - [3, 31]
          name: attribute_name [3, 5] - [3, 10]
          value: quoted_attribute_value [3, 11] - [3, 31]
            attribute_value [3, 12] - [3, 30]
      element [4, 4] - [6, 10]
        tag_start [4, 4] - [4, 30]
          name: element_identifier [4, 5] - [4, 8]
          attribute [4, 9] - [4, 29]
            name: attribute_name [4, 9] - [4, 14]
            value: quoted_attribute_value [4, 15] - [4, 29]
              attribute_value [4, 16] - [4, 28]
        element [5, 8] - [5, 49]
          tag_start [5, 8] - [5, 41]
            name: element_identifier [5, 9] - [5, 10]
            attribute [5, 11] - [5, 40]
              name: attribute_name [5, 11] - [5, 16]
              value: quoted_attribute_value [5, 17] - [5, 40]
                attribute_value [5, 18] - [5, 39]
...

Minimal vimrc file

Please provide a minimal vimrc file that reproduces the issue. The following should often suffice:

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" },
  -- add any other plugins here

  {
    "nvim-treesitter/nvim-treesitter",
    cmd = { "TSInstall", "TSBufEnable", "TSBufDisable", "TSModuleInfo" },
    dependencies = {
      "nvim-treesitter/playground",
      "nvim-treesitter/nvim-treesitter-textobjects",
    },
    config = function()
      require("nvim-treesitter.configs").setup({
        ensure_installed = {
          "html",
          "css",
          "go",
          "templ",
        },
        highlight = {
          enable = true,
          use_languagetree = true,
        },

        matchup = {
          enable = true, -- required for vim-matchup
          disable_virtual_text = true,
        },

        playground = {
          enable = true,
        },

      })
    end,
  },

  {
    -- https://github.com/andymass/vim-matchup#tree-sitter-integration
    "andymass/vim-matchup",
    lazy = false,
    config = function()
      vim.g.matchup_matchparen_offscreen = { method = "popup" }
    end,
  },
}
require("lazy").setup(plugins, {
  root = root .. "/plugins",
})

vim.cmd.colorscheme("tokyonight")