Move Undo form inside closure message element

app/assets/stylesheets/card-perma.css

@@ -343,5 +343,9 @@
     grid-area: closure-message;
     margin-block-start: 0.5ch;
     padding-inline: 1ch;
+
+    form {
+      display: inline;
+    }
   }
 }

app/views/cards/container/_closure.html.erb

@@ -2,10 +2,12 @@
   <% if card.closed? %>
     <div class="card-perma__notch card-perma__notch--bottom flex-column">
       <div class="flex gap-half margin-block-start-double margin-block-end">
-        <span class="card-perma__closure-message">Completed by <%= card.closed_by.name %> on <%= local_datetime_tag(card.closed_at, style: :shortdate) %>.</span>
-        <%= button_to card_closure_path(card), method: :delete, class: "btn btn--plain borderless fill-transparent" do %>
-          <span class="pad-inline-end">Undo</span>
-        <% end %>
+        <span class="card-perma__closure-message">
+          Completed by <%= card.closed_by.name %> on <%= local_datetime_tag(card.closed_at, style: :shortdate) %>.
+          <%= button_to card_closure_path(card), method: :delete, class: "btn btn--plain borderless fill-transparent" do %>
+            <span class="pad-inline-end">Undo</span>
+          <% end %>
+        </span>
       </div>
     </div>
   <% else %>