Stage 5 click-testing fixes

- Fix link_to :method → button_to for all PUT/DELETE actions
- Add button_to CSS reset to admin.css for visual consistency
- Fix admin layout: replace broken jquery/jquery_ujs pipeline refs with
  admin_bundle via sprockets; add sprockets-rails, jquery-ui-rails gems
- Add app/assets/javascripts/admin_bundle.js pipeline manifest
- Fix event_information helper: use safe_join to avoid double-escaping
- Fix nodes_helper: to_s(:db) → to_fs(:db) for event times
- Fix revisions view: eliminate nested forms; diff button uses vanilla JS
  to collect radio button values before POST
- Fix config/environments/development.rb and test.rb: cache_classes →
  enable_reloading
- Add routing_filter_rails71_patch.rb version guard
- Move LockedByAnotherUser to own file for Zeitwerk autoloading
- Fix Globalize fallbacks via config.i18n.fallbacks in application.rb

1 files changed, 4 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index 2f6e394..f3bd1a1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,6 +4,7 @@ ruby '3.2.11'
 
 gem 'rails', '~> 7.2.3'
 gem 'concurrent-ruby', '~> 1.3'
+gem 'sprockets-rails'
 gem 'puma'
 
 gem 'pg', '~> 1.4.6'
@@ -17,8 +18,10 @@ gem 'will_paginate', '~> 3.0'
 gem 'exception_notification', '~> 4.5'
 gem 'libxml-ruby', '~> 5.0', :require => 'xml'
 
-gem 'nokogiri', '~> 1.18'
 gem 'jquery-rails'
+gem 'jquery-ui-rails'
+
+gem 'nokogiri', '~> 1.18'
 
 gem 'unicorn', '~> 6.1'