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/cms/locales/de.json

@@ -234,5 +234,17 @@
         "content_pages": "Inhaltsseiten",
         "store_themes": "Shop-Themes",
         "media_library": "Mediathek"
+    },
+    "permissions": {
+        "view_pages": "Seiten anzeigen",
+        "view_pages_desc": "Inhaltsseiten anzeigen",
+        "manage_pages": "Seiten verwalten",
+        "manage_pages_desc": "Inhaltsseiten erstellen, bearbeiten und löschen",
+        "view_media": "Medien anzeigen",
+        "view_media_desc": "Medienbibliothek durchsuchen",
+        "manage_media": "Medien verwalten",
+        "manage_media_desc": "Mediendateien hochladen, bearbeiten und löschen",
+        "manage_themes": "Themes verwalten",
+        "manage_themes_desc": "Shop-Themes konfigurieren und anpassen"
     }
 }