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/fr.json

@@ -234,5 +234,17 @@
         "content_pages": "Pages de contenu",
         "store_themes": "Thèmes du magasin",
         "media_library": "Médiathèque"
+    },
+    "permissions": {
+        "view_pages": "Voir les pages",
+        "view_pages_desc": "Voir les pages de contenu",
+        "manage_pages": "Gérer les pages",
+        "manage_pages_desc": "Créer, modifier et supprimer les pages de contenu",
+        "view_media": "Voir les médias",
+        "view_media_desc": "Parcourir la bibliothèque de médias",
+        "manage_media": "Gérer les médias",
+        "manage_media_desc": "Télécharger, modifier et supprimer les fichiers médias",
+        "manage_themes": "Gérer les thèmes",
+        "manage_themes_desc": "Configurer et personnaliser les thèmes"
     }
 }