install importmaps and turbo + signout link fixed.

Gemfile

@@ -10,6 +10,8 @@ gem "rails_admin",               "~> 3.0"
 gem "rake",                      "~> 13.0"
 gem "puma",                      "~> 7.0"
 gem "sprockets",                 "~> 4.0"
+gem "importmap-rails"
+gem "turbo-rails"
 
 # noise dependencies:
 

Gemfile.lock

@@ -101,6 +101,7 @@ GEM
     drb (2.2.1)
     erubi (1.13.1)
     ffi (1.17.1)
+    ffi (1.17.1-aarch64-linux-gnu)
     ffi (1.17.1-arm64-darwin)
     ffi (1.17.1-x86_64-linux-gnu)
     globalid (1.2.1)
@@ -110,6 +111,10 @@ GEM
     icalendar (2.10.2)
       ice_cube (~> 0.16)
     ice_cube (0.17.0)
+    importmap-rails (2.2.2)
+      actionpack (>= 6.0.0)
+      activesupport (>= 6.0.0)
+      railties (>= 6.0.0)
     io-console (0.8.0)
     irb (1.15.0)
       pp (>= 0.6.0)
@@ -139,7 +144,6 @@ GEM
     marcel (1.0.4)
     method_source (1.1.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.8)
     minitest (5.26.2)
     minitest-rails (8.0.0)
       minitest (~> 5.20)
@@ -156,8 +160,7 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.18.9)
-      mini_portile2 (~> 2.8.2)
+    nokogiri (1.18.9-aarch64-linux-gnu)
       racc (~> 1.4)
     nokogiri (1.18.9-arm64-darwin)
       racc (~> 1.4)
@@ -251,8 +254,7 @@ GEM
       actionpack (>= 6.1)
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
-    sqlite3 (2.5.0)
-      mini_portile2 (~> 2.8.0)
+    sqlite3 (2.5.0-aarch64-linux-gnu)
     sqlite3 (2.5.0-arm64-darwin)
     sqlite3 (2.5.0-x86_64-linux-gnu)
     stringio (3.1.2)
@@ -276,8 +278,8 @@ GEM
     zeitwerk (2.7.3)
 
 PLATFORMS
+  aarch64-linux
   arm64-darwin
-  ruby
   x86_64-linux
 
 DEPENDENCIES
@@ -286,6 +288,7 @@ DEPENDENCIES
   bootsnap (~> 1.11)
   devise (~> 4.8)
   icalendar (~> 2.10)
+  importmap-rails
   minitest (~> 5.14)
   minitest-rails (~> 8.0.0)
   ostruct (~> 0.6)
@@ -299,9 +302,10 @@ DEPENDENCIES
   sassc-rails (~> 2.1)
   sprockets (~> 4.0)
   sqlite3 (~> 2.0)
+  turbo-rails
 
 RUBY VERSION
    ruby 3.4.7p58
 
 BUNDLED WITH
-   2.7.2
+   2.6.9

app/assets/config/manifest.js

@@ -1,3 +1,4 @@
   //= link_tree ../images
-  //= link_directory ../javascripts .js
   //= link_directory ../stylesheets .css
+//= link_tree ../../javascript .js
+//= link_tree ../../../vendor/javascript .js

app/helpers/application_helper.rb

@@ -26,8 +26,9 @@ def twitter_link person
     icon_link "icon-leaf", "@#{v}", v, "http://twitter.com/"
   end
 
-  def nav_item_link link_label, link_path, method=nil
-    content_tag :li, link_to(link_label, link_path, method), :class => ('active' if current_page?(link_path))
+  def nav_item_link link_label, link_path, options={}
+    link_options = options.is_a?(Hash) ? options : (options ? { method: options } : {})
+    content_tag :li, link_to(link_label, link_path, link_options), :class => ('active' if current_page?(link_path))
   end
 
   def title_or_action

app/javascript/application.js

@@ -0,0 +1 @@
+import "@hotwired/turbo-rails"

app/views/layouts/application.html.erb

@@ -7,6 +7,8 @@
     <meta name="description" content="">
 
     <meta name="viewport" content="width=device-width,initial-scale=1">
+    <%= csrf_meta_tags %>
+    <%= javascript_importmap_tags %>
     <%= stylesheet_link_tag "//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css" %>
     <%= stylesheet_link_tag "application", :media => "all" %>
   </head>
@@ -32,7 +34,7 @@
             <ul class="nav pull-right">
               <% if signed_in? %>
                 <%= nav_item_link current_member.name, member_path(current_member) %>
-                <%= nav_item_link "Log out", destroy_member_session_path, method: :delete %>
+                <%= nav_item_link "Log out", destroy_member_session_path, data: { turbo_method: :delete } %>
               <% else %>
                 <%= nav_item_link "Log in", new_member_session_path %>
               <% end %>
@@ -52,7 +54,6 @@
       Seattle Ruby Brigade: Growing the Ruby Community
       <small> &nbsp; <a class="muted" href="https://github.com/seattlerb/seattlerb.org">(source code)</a></small>
     </footer>
-    <%= javascript_include_tag 'application' %>
     <%= javascript_include_tag '//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/js/bootstrap.min.js' %>
     <%= yield :javascript_footer %>
   </body>

bin/importmap

@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+
+require_relative "../config/application"
+require "importmap/commands"

config/importmap.rb

@@ -0,0 +1,2 @@
+pin "application"
+pin "@hotwired/turbo-rails", to: "turbo.min.js"