Stage 5 fixes: RouteWithParams removal, Globalize fallbacks, search stub, to_s(:db) → to_fs(:db), LockedByAnotherUser autoload, test environment config

- Remove safe_path helper and content_path shim from link_helper.rb
- Update all safe_path call sites in views to use named route helpers directly
- Fix Globalize fallbacks via config.i18n.fallbacks in application.rb, remove i18n initializer
- Stub Node.search returning none (search disabled pending PostgreSQL upgrade)
- Replace to_s(:db) with to_fs(:db) in node.rb, nodes_helper.rb, link_helper.rb, admin view
- Move LockedByAnotherUser to app/models/locked_by_another_user.rb for Zeitwerk autoloading
- Fix config/environments/test.rb: config.assets removed, cache_classes → enable_reloading,
  test_order removed, minitest pinned to ~> 5.25
- Fix config/environments/development.rb: cache_classes → enable_reloading
- Park search vector migration in doc/ pending PostgreSQL and plpgsql availability

1 files changed, 2 insertions, 2 deletions

diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 84dcdc6..c5cbf14 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -52,8 +52,8 @@
           <div class="main_navigation">
             <h2>Admin</h2>
             <ul>
-              <li><%= link_to raw('<span class="inactive admin_edit_link">⚙️ Overview</span>'), safe_path(:admin_path) %></li>
-              <li><%= link_to raw('<span class="inactive admin_edit_link">✎ Edit</span>'), safe_path(:node_path, @page.node) %></li>
+              <li><%= link_to raw('<span class="inactive admin_edit_link">⚙️ Overview</span>'), admin_path %></li>
+              <li><%= link_to raw('<span class="inactive admin_edit_link">✎ Edit</span>'), node_path(@page.node) %></li>
             </ul>
           </div>
         <% end %>