intake: guard hoisted EntityStep script on non-entity pages

site/src/components/intake/steps/EntityStep.astro

@@ -148,6 +148,7 @@
 </style>
 
 <script>
+  if (document.querySelector('[data-slug="entity"], [data-step="entity"]')) {
   const get = <T extends HTMLElement>(id: string) => document.getElementById(id) as T;
   const INPUTS = {
     email: get<HTMLInputElement>("pw-email"),
@@ -462,4 +463,5 @@
       },
     });
   });
+  }
 </script>