allow to delegate

app/views/submission_events/index.html.erb

@@ -20,10 +20,13 @@
           <% end %>
         </p>
       </li>
+      <% submitter_versions_index = @submission.submitters.each_with_object({}) { |s, h| h[s.id] = s.submitter_versions.to_a.sort_by(&:created_at) } %>
       <% @submission.submission_events.order(:event_timestamp).each do |event| %>
         <% submitter = @submission.submitters.find { |e| e.id == event.submitter_id } %>
         <% bg_class = event_colors[submitters_uuids.index(submitter.uuid) % event_colors.length] %>
-        <% submitter_name = event.event_type.include?('sms') || event.event_type.include?('phone') ? (event.data['phone'] || submitter.phone) : (submitter.name || submitter.email || submitter.phone) %>
+        <% versions = submitter_versions_index[submitter.id] || [] %>
+        <% active_version = versions.find { |v| v.created_at > event.event_timestamp } %>
+        <% submitter_name = event.event_type.include?('sms') || event.event_type.include?('phone') ? (event.data['phone'] || active_version&.phone || submitter.phone) : (active_version&.name || active_version&.email || active_version&.phone || submitter.name || submitter.email || submitter.phone) %>
         <li class="ml-7">
           <span class="absolute flex items-center justify-center w-7 h-7 rounded-full -start-3.5 ring-8 ring-base-100 text-base-content <%= bg_class %>">
             <%= svg_icon(SubmissionEventsController::SUBMISSION_EVENT_ICONS.fetch(event.event_type, 'circle_dot'), class: 'w-4 h-4') %>
@@ -43,6 +46,9 @@
               <%= t('submission_event_names.complete_verification_by_html', provider: event.data['method'], submitter_name:) %>
             <% elsif event.event_type == 'invite_party' && (invited_submitter = @submission.submitters.find { |e| e.uuid == event.data['uuid'] }) && (name = @submission.template_submitters.find { |e| e['uuid'] == event.data['uuid'] }&.dig('name')) %>
               <%= t('submission_event_names.invite_party_by_html', invited_submitter_name: [invited_submitter.name || invited_submitter.email || invited_submitter.phone, name].join(' '), submitter_name:) %>
+            <% elsif event.event_type == 'delegate_form' %>
+              <% delegate_from = event.data['old_email'].presence || (versions.reverse.find { |v| v.created_at <= event.event_timestamp }&.then { |v| v.name || v.phone }) %>
+              <%= t('submission_event_names.delegate_form_by_html', from: delegate_from, to: event.data['email']) %>
             <% elsif event.event_type.include?('send_') %>
               <%= t("submission_event_names.#{event.event_type}_to_html", submitter_name:) %>
             <% elsif event.event_type.start_with?('bounce_') ||  event.event_type.start_with?('complaint_') %>