Export/import elements added to the page

back-office/app/views/items/export_import.html.erb

@@ -1 +1,19 @@
+<%= form_tag('./export_import') do %>
+  <p><label for="codes">
+    CSV content goes here:
+  </label><br />
+  <%= text_area_tag "csv_content", @csv_content, rows: 20, cols: 70 %></p>
 
+  <p><label for="task">Task: </label>
+  <%= select_tag "task", options_for_select(@tasks) %></p>
+
+  <p><%= submit_tag "Run task" %></p>
+
+  <% if !@error_message.nil? && @error_message != "" %>
+  <div>Error message: <span style="color: red"><%= @error_message %></span></div>
+  <% end %>
+
+  <br />
+  <p><label for="output_area">Output area: </label>
+  <div id="output_area" style="width: 36.4em;height: 14em;outline: 1px solid #A9A9A9;"></div>
+<% end %>