printedparts stage 14: retire/restore in the UI, dashless item codes

Retire button with confirmation on the detail page (item leaves the
storefront and the kiosk rejects its code; ledger history and label
survive), Restore on retired items, and an Include-retired list toggle
with a badge. Restore is its own permission-gated POST - the generic
update still cannot flip isactive. New codes mint as WJRP0042 style
without the dash; existing codes are immutable bin labels and keep
their form.

tests/test_plugins/test_printedparts_ledger.py

@@ -39,7 +39,7 @@ def test_create_mints_itemcode(client, auth_headers):
                            headers=auth_headers)
     assert response.status_code == 201
     data = response.get_json()['data']
-    assert data['itemcode'] == f"3DP-{data['printeditemid']:04d}"
+    assert data['itemcode'] == f"3DP{data['printeditemid']:04d}"
     assert data['quantityonhand'] == 0
 
 
@@ -240,3 +240,23 @@ def test_alert_recipients_merge_users_and_freetext(client, auth_headers, app,
     assert take.status_code == 200          # 4 on hand: crossed threshold 5
 
     assert captured['to'] == ['lead@site.test', 'extra@site.test']
+
+
+def test_retire_hides_and_restore_returns(client, auth_headers, item):
+    """Retire drops the item from the default list and the kiosk; restore
+    brings it back with history intact."""
+    assert client.delete(f'/api/printedparts/items/{item}',
+                         headers=auth_headers).status_code == 200
+
+    listed = client.get('/api/printedparts/items').get_json()['data']
+    assert all(row['printeditemid'] != item for row in listed)
+    kiosk = client.get('/api/printedparts/kiosk/item/3DP-9001')
+    assert kiosk.status_code == 404
+
+    including = client.get('/api/printedparts/items?active=false')
+    assert any(row['printeditemid'] == item
+               for row in including.get_json()['data'])
+
+    assert client.post(f'/api/printedparts/items/{item}/restore',
+                       headers=auth_headers).status_code == 200
+    assert client.get('/api/printedparts/kiosk/item/3DP-9001').status_code == 200