Contestant view: show offline participation images

app/views/contestants/_form.html.slim

@@ -72,3 +72,23 @@
     .col
       a.btn.btn-primary href=new_contest_completion_path(@contest, contestant_id: contestant.id)
         = t("helpers.buttons.add")
+
+- if contestant.offline.present?
+  .row.mt-5.mb-2
+    .col
+      h3 = t("contestants.edit.offline_participation")
+  .row.mb-5
+    .col-6
+      h4 = t("contestants.edit.start_image")
+      - if contestant.offline.images.length > 0
+        .mt-3.mb-1
+          = contestant.offline.start_time.to_fs(:rfc822)
+        = image_tag(contestant.offline.images[0], class: "img-fluid", style: "max-height: 400px")
+    .col-6
+      h4 = t("contestants.edit.end_image")
+      - if contestant.offline.images.length > 1
+        .mt-3.mb-1
+          = contestant.offline.end_time.to_fs(:rfc822)
+        = image_tag(contestant.offline.images[1], class: "img-fluid", style: "max-height: 400px")
+      - else
+        = t("contestants.edit.not_finished")