Put the menu drag handle next to the summary instead of inside it

A button inside a summary is an interactive element in an interactive element; screen
readers announce it unreliably. The handle keeps its look and its mouse, touch and arrow
key behaviour. Also corrects the anchor hints and waits for the menu error in the admin check.

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

scripts/admin-quality-check.mjs

@@ -143,7 +143,7 @@ try {
   await page.getByRole('button', { name: 'Link hinzufügen', exact: true }).click();
   assert.equal((await menuSave()).status(), 422);
   assert.equal(await entries.last().locator('[data-key="url"]').inputValue(), 'javascript:alert(1)');
-  assert.equal(await page.locator('#menu-error').isVisible(), true);
+  await page.locator('#menu-error').waitFor({ state: 'visible' });
   await entries.last().locator('summary').click();
   await entries.last().getByLabel('Adresse', { exact: true }).fill('/#kontakt');
   assert.equal((await menuSave()).status(), 200);
@@ -155,7 +155,7 @@ try {
   await page.getByLabel('Name des Menüs').fill('QA lokaler Stand');
   assert.equal((await menuSave()).status(), 409);
   assert.equal(await page.getByLabel('Name des Menüs').inputValue(), 'QA lokaler Stand');
-  assert.equal(await page.locator('#menu-error').isVisible(), true);
+  await page.locator('#menu-error').waitFor({ state: 'visible' });
   checks.push({ name: 'menu search by keyboard, add/nest/remove/undo/save, invalid URL and conflict retain input', passed: true });
 
   await page.goto(origin + '/admin/forms');