test(17): open Settings tab before asserting Timezone region in e2e

Phase 17 D-10 reworked /admin into a two-tab layout; the Timezone section
moved into the (initially hidden) Settings tab panel. timezone-verify.spec.ts
predates that rework and asserted the region visible on bare /admin, so all 7
tests timed out in the harness. Click the Settings tab in beforeEach and after
the persist-test reload. Product behavior is correct; the spec was stale.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/pwa/e2e/timezone-verify.spec.ts

@@ -20,6 +20,10 @@ test.describe('Admin Timezone section — 18-04 round-trip', () => {
     test.skip(testInfo.project.name !== 'desktop', 'Admin timezone UI is desktop-only');
     await page.goto('/admin');
     await expect(page.getByRole('heading', { name: 'Admin Settings' })).toBeVisible();
+    // Phase 17 (D-10) reworked /admin into a two-tab layout; the Timezone section
+    // now lives in the "Settings" tab panel, which is hidden until selected. Open
+    // it before asserting the section.
+    await page.getByRole('tab', { name: 'Settings' }).click();
     // Wait for the Timezone section to load (requires the 18-02 GET endpoint)
     const tzSection = page.getByRole('region', { name: 'Timezone' });
     await expect(tzSection).toBeVisible({ timeout: 15_000 });
@@ -98,6 +102,8 @@ test.describe('Admin Timezone section — 18-04 round-trip', () => {
     // Reload and verify persistence
     await page.reload();
     await expect(page.getByRole('heading', { name: 'Admin Settings' })).toBeVisible();
+    // Reload resets to the default "Members & Accounts" tab — re-open Settings.
+    await page.getByRole('tab', { name: 'Settings' }).click();
     await expect(tzSection).toBeVisible({ timeout: 15_000 });
     const inputAfterReload = page.getByRole('combobox', { name: 'Household timezone' });
     await expect(inputAfterReload).toHaveValue('America/Chicago');