feat: add optional description to request_apply_commit and request_spawn

hive-c0re/assets/app.js

@@ -684,6 +684,9 @@
             'new sub-agent — container will be created on approve'),
         );
       }
+      if (a.description) {
+        li.append(el('div', { class: 'approval-description' }, a.description));
+      }
       // Deny prompts the operator for an optional reason; the
       // submit handler stashes it into a hidden `note` input that
       // rides along on the POST and is surfaced to the manager via