test(web): admin nav is nine tabs — #2527

The tab list is pinned by name and order, so adding Missing files
failed the assertion. That is the test doing its job: the nav is a
deliberate ordering, not an accident, and a new entry should have to
be declared rather than slipping in.

web/src/lib/components/AdminTabs.test.ts

@@ -52,7 +52,7 @@ describe('AdminTabs', () => {
     );
   });
 
-  test('renders all eight tabs in order', () => {
+  test('renders all nine tabs in order', () => {
     state.pageUrl = new URL('http://localhost/admin');
     render(AdminTabs);
     const links = screen.getAllByRole('link');
@@ -61,6 +61,9 @@ describe('AdminTabs', () => {
       'Integrations',
       'Requests',
       'Quarantine',
+      // Missing files sits with Quarantine and Playback errors: the three
+      // surfaces that show tracks needing an operator's attention.
+      'Missing files',
       'Playback errors',
       'Diagnostics',
       'Tuning',