preview only correct pages

app/controllers/admin/communication/websites/pages_controller.rb

@@ -27,6 +27,7 @@ class Admin::Communication::Websites::PagesController < Admin::Communication::We
   end
 
   def show
+    @preview = true
     breadcrumb
     add_breadcrumb(@page, admin_communication_website_page_path(@page))
   end

app/controllers/admin/communication/websites/posts_controller.rb

@@ -33,6 +33,7 @@ class Admin::Communication::Websites::PostsController < Admin::Communication::We
   end
 
   def show
+    @preview = true
     breadcrumb
   end
 

app/controllers/admin/education/programs_controller.rb

@@ -50,6 +50,7 @@ class Admin::Education::ProgramsController < Admin::Education::ApplicationContro
   def show
     @roles = @program.university_roles.ordered
     @teacher_involvements = @program.university_person_involvements.includes(:person).ordered_by_name
+    @preview = true
     breadcrumb
   end
 

app/views/admin/layouts/themes/_appstack.html.erb

@@ -22,7 +22,7 @@
           </div>
           <%= yield %>
         </div>
-        <%= render 'admin/application/preview' %>
+        <%= render 'admin/application/preview' if @preview %>
       </main>
     </div>
   </div>

app/views/admin/layouts/themes/_pure.html.erb

@@ -15,7 +15,7 @@
     <div class="position-relative">
       <%= yield %>
     </div>
-    <%= render 'admin/application/preview' %>
+    <%= render 'admin/application/preview' if @preview %>
   </main>
   <%= render "admin/layouts/themes/pure/commands" %>
   <%= render "admin/layouts/themes/pure/footer" %>