fix list of offers (and some other lists), and add tests for offers

test-playwright/20-create-project.spec.ts

@@ -43,12 +43,10 @@ test('Create new project, then search for it', async ({ page }) => {
   // Search for newly-created project in /projects
   await page.goto('./projects');
   await page.getByRole('link', { name: 'Projects', exact: true }).click();
-  await page.waitForTimeout(3000); // Wait for a bit
   await expect(page.locator('ul#listProjects li.border-b:nth-child(1)')).toContainText(finalRandomString); // Assumes newest project always appears first in the Projects tab list
 
   // Search for newly-created project in /discover
   await page.goto('./discover');
-  await page.waitForTimeout(3000); // Wait for a bit
   await page.getByPlaceholder('Search…').fill(finalRandomString);
   await page.locator('#QuickSearch button').click();
   await expect(page.locator('ul#listDiscoverResults li.border-b:nth-child(1)')).toContainText(finalRandomString);