Presever Tempfile target extension to pass target file gem specific validations on these

app/models/dunlop/target_file_model.rb

@@ -106,7 +106,8 @@ module Dunlop::TargetFileModel
   end
 
   def new_working_file
-    local_working_file = Tempfile.new("target_file", Rails.application.config.working_path)
+    #local_working_file = Tempfile.new("target_file", Rails.application.config.working_path)
+    local_working_file = Tempfile.new([target_basename, File.extname(target_basename)], Rails.application.config.working_path) # keep reference for tempfile till unzip completed and keep extension preserved
     FileUtils.chmod(0666, local_working_file.path)
     local_working_file
   end

app/views/application/_admin_user_roles.html.slim

@@ -3,3 +3,4 @@
   .column= render "dunlop/users/scenario_permissions"
   .column= render "dunlop/users/source_files_permissions"
   .column= render "dunlop/users/target_files_permissions"
+