feat(roles): add admin store roles page, permission i18n, and menu integration

- Add admin store roles page with merchant→store cascading for superadmin
  and store-only selection for platform admin
- Add permission catalog API with translated labels/descriptions (en/fr/de/lb)
- Add permission translations to all 15 module locale files (60 files total)
- Add info icon tooltips for permission descriptions in role editor
- Add store roles menu item and admin menu item in module definition
- Fix store-selector.js URL construction bug when apiEndpoint has query params
- Add admin store roles API (CRUD + platform scoping)
- Add integration tests for admin store roles and permission catalog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/catalog/locales/de.json

@@ -75,5 +75,19 @@
     "menu": {
         "products_inventory": "Produkte & Inventar",
         "all_products": "Alle Produkte"
+    },
+    "permissions": {
+        "products_view": "Produkte anzeigen",
+        "products_view_desc": "Produktkatalog anzeigen",
+        "products_create": "Produkte erstellen",
+        "products_create_desc": "Neue Produkte zum Katalog hinzufügen",
+        "products_edit": "Produkte bearbeiten",
+        "products_edit_desc": "Bestehende Produktdetails ändern",
+        "products_delete": "Produkte löschen",
+        "products_delete_desc": "Produkte aus dem Katalog entfernen",
+        "products_import": "Produkte importieren",
+        "products_import_desc": "Massenimport von Produkten",
+        "products_export": "Produkte exportieren",
+        "products_export_desc": "Produktdaten exportieren"
     }
 }