test(e2e): assert a created link's address shows in the table (#260)

The spec's E2E section requires that a created link shows its address in the table, but the test that creates one filled a throwaway address and never asserted the cell. The address is now kept in a variable and asserted on the row after creation, using it to locate the row's own cell rather than any other row's.

Not run: the local stack is down and Playwright was explicitly out of bounds for this pass, per the task instructions. This is written and verified by inspection and lint only.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

frontend/tests/e2e/admin-upload-links.spec.ts

@@ -12,12 +12,13 @@ import { test, expect, uniqueSuffix } from './fixtures';
 test.describe('Managing upload links', () => {
   test('issues a link, shows its token once, and lists it bounded', async ({ page, admin }) => {
     const label = `Sarah ${uniqueSuffix()}`;
+    const email = `${uniqueSuffix()}@example.com`;
 
     await admin.goto();
     await page.getByRole('tab', { name: 'Upload links' }).click();
 
     await page.getByLabel('Link label').fill(label);
-    await page.getByLabel('Contributor email').fill(`${uniqueSuffix()}@example.com`);
+    await page.getByLabel('Contributor email').fill(email);
     await page.getByRole('button', { name: 'Create link' }).click();
 
     // Shown exactly once. The server keeps only a digest, so there is no
@@ -28,6 +29,8 @@ test.describe('Managing upload links', () => {
 
     const row = page.getByRole('row', { name: new RegExp(label) });
     await expect(row).toBeVisible();
+    // A created link shows its address in the table.
+    await expect(row.getByText(email)).toBeVisible();
     // The default cap, not unlimited. An unbounded link should be asked for.
     await expect(row.getByText('0 of 25')).toBeVisible();
     await expect(row.getByText('Active')).toBeVisible();