fix(i18n): retain historical checklist text for unknown system keys

job-tracker-ui/src/application-checklist.test.tsx

@@ -68,6 +68,14 @@ test("localizes system checklist content without changing user-authored tasks",
   expect(screen.getByText("Ask Sara for a referral")).toBeInTheDocument();
 });
 
+test.each(['en', 'nb'])('preserves unknown historical system task text in %s', async language => {
+  window.localStorage.setItem('uiLanguage', language);
+  mockedApi.get.mockResolvedValue({ data: checklist([item({ systemKey: 'retired-system-task', title: 'Reviewed historical task', description: 'Original task details' })]) } as any);
+  renderChecklist();
+  expect(await screen.findByText('Reviewed historical task')).toBeInTheDocument();
+  expect(screen.getByText('Original task details')).toBeInTheDocument();
+});
+
 test("renders the checklist grouped by category with progress", async () => {
   renderChecklist();
 

job-tracker-ui/src/applicationWorkspace.ts

@@ -1,4 +1,5 @@
 import { api } from "./api";
+import { translations } from "./i18n/translations";
 
 // Mirrors WorkspaceOverviewDto. Read-only aggregate — the workspace owns no data.
 export type WorkspaceCv = {
@@ -93,7 +94,9 @@ export const WORKSPACE_SECTIONS: { key: WorkspaceSectionKey; label: string }[] =
 
 export function checklistSystemTranslationToken(systemKey?: string | null): string | null {
   if (!systemKey || systemKey.startsWith("learning:")) return null;
-  return systemKey.replace(/-([a-z])/g, (_, letter: string) => letter.toUpperCase());
+  const token = systemKey.replace(/-([a-z])/g, (_, letter: string) => letter.toUpperCase());
+  return Object.hasOwn(translations.en, `checklistItem_${token}`)
+    && Object.hasOwn(translations.en, `checklistItem_${token}Description`) ? token : null;
 }
 
 const LEGACY_WORKSPACE_SECTIONS: Record<string, WorkspaceSectionKey> = {

job-tracker-ui/src/checklist-translation-token.test.ts

@@ -0,0 +1,11 @@
+import { checklistSystemTranslationToken } from './applicationWorkspace';
+
+test.each(['retired-system-task', 'constructor', '__proto__'])('does not manufacture translation keys for %s', key => {
+  expect(checklistSystemTranslationToken(key)).toBeNull();
+});
+
+test('retains the known system translation and learning/custom boundaries', () => {
+  expect(checklistSystemTranslationToken('prepare-cv')).toBe('prepareCv');
+  expect(checklistSystemTranslationToken('learning:prepare-cv')).toBeNull();
+  expect(checklistSystemTranslationToken(null)).toBeNull();
+});