Add `ModalController#close` action

app/controllers/modal_controller.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class ModalController < ApplicationController
+  include ActionView::Helpers::TagHelper
+  include Turbo::FramesHelper
+
+  skip_before_action :find_active_announcements, :banned?
+
+  def close
+    redirect_to root_path unless turbo_frame_request?
+    render inline: turbo_frame_tag("modal")
+  end
+end

app/views/layouts/base.html.haml

@@ -32,6 +32,7 @@
     = yield
     = render "shared/formatting"
     = render "shared/hotkeys"
+    = turbo_frame_tag "modal"
     .d-none#toasts
     - if Rails.env.development?
       #debug

config/routes.rb

@@ -181,5 +181,7 @@ Rails.application.routes.draw do
 
   get "/nodeinfo/2.1", to: "well_known/node_info#nodeinfo", as: :node_info
 
+  get "/modal/close", to: "modal#close", as: :modal_close
+
   puts "processing time of routes.rb: #{"#{(Time.zone.now - start).round(3).to_s.ljust(5, '0')}s".light_green}"
 end