refactor: implement the change requests

Author: MitanOmar

frontend/app/components/topnav.hbs

@@ -92,7 +92,7 @@
           <Topnav::LinkTo
             @onClick={{fn (mut this.expand) false}}
             title="Open Timed documentation for current page"
-            href={{this.docs.docsEndpoint}}
+            href={{this.docs.endpoint}}
             target="_blank"
             data-test-docs-link
           >

frontend/app/services/docs.js

@@ -16,11 +16,11 @@ const ROUTE_DOCS_MAPPING = {
 export default class DocsService extends Service {
   @service router;
 
-  get docsEndpoint() {
+  get endpoint() {
     return config.docsBaseUrl + this.docsURL;
   }
 
   get docsURL() {
-    return ROUTE_DOCS_MAPPING[this.router.currentRouteName] || "";
+    return ROUTE_DOCS_MAPPING[this.router.currentRouteName] ?? "";
   }
 }