Fix dom_id delegation for Rails 8.2 compatibility

[lylo]

Summary

When using Lexxy 0.1.23.beta with Rails 8.2.0.alpha, the lexxy_rich_text_area helper raises:

NoMethodError: undefined method 'dom_id' for an instance of ActionView::Helpers::Tags::ActionText

This happens because when Lexxy::ActionTextTag is prepended to ActionView::Helpers::Tags::ActionText, the dom_id method (which Rails delegates to ActionView::RecordIdentifier) isn't accessible from within the prepended module's methods.

Fix

Add an explicit delegation using ActiveSupport::Concern's prepended block, which runs when the module is prepended and sets up the delegation on the target class.

Test plan

• Existing system tests in form_test.rb exercise the form helper which uses dom_id
• Tested manually with a Rails 8.2.0.alpha application

[lylo]

I'm currently monkey-patching this in my app which works for the time being.

Rails.application.config.to_prepare do
  Lexxy::ActionTextTag.module_eval do
    delegate :dom_id, to: ActionView::RecordIdentifier
  end
end