fix: keep navigation labels single and accessible

tests/browser/no-javascript.spec.ts

@@ -25,6 +25,17 @@ const sectionHeadings = [
   'CONTACT',
 ] as const;
 
+const navigationLabels: Readonly<Record<(typeof sectionIds)[number], string>> = {
+  start: 'Start',
+  profile: 'Profile',
+  experience: 'Career',
+  infrastructure: 'Infra',
+  'selected-builds': 'Builds',
+  'additional-work': 'More work',
+  toolkit: 'Toolkit',
+  contact: 'Contact',
+};
+
 const visibleTextLeafSelector = 'h1,h2,h3,p,dt,dd,li,figcaption,a,svg text';
 const visibleTextSelector = [
   '.site-header :is(h1,h2,h3,p,dt,dd,li,figcaption,a)',
@@ -96,12 +107,7 @@ const expectedVisibleTextSegments = (
   return [
     content.identity.name,
     content.identity.role,
-    ...sectionIds.map((id) => {
-      const label = navigationById.get(id);
-      if (label === undefined)
-        throw new Error(`Missing navigation label: ${id}`);
-      return label;
-    }),
+    ...sectionIds.map((id) => navigationLabels[id]),
     ...section('start', 1, [content.identity.valueProposition]),
     ...section('profile', 2, [
       content.profile.introduction,