Route article detail tabs in the URL and pin a preferred default.

Use /artikel/:sku/:tab with a localStorage-backed default, and a pin control to set which tab opens first.

src/pages/artikel/index.jsx

@@ -29,6 +29,7 @@ import {
   parseFilter,
 } from './searchFormat';
 import { preserveSearchFocus } from './searchFocus';
+import { artikelDetailPath } from './articleRoute';
 import withSearchParams from './withSearchParams';
 
 const resultRowSx = {
@@ -430,7 +431,7 @@ class ArtikelSearchPage extends Component {
                         onMouseDown={(e) => e.preventDefault()}
                         onClick={() => {
                           this.persistQuery();
-                          this.props.navigate(`/artikel/${encodeURIComponent(row.sku)}`);
+                          this.props.navigate(artikelDetailPath(row));
                         }}
                         sx={resultRowSx}
                       >