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/en.json

@@ -200,6 +200,18 @@
             "cta_final_note": "No credit card required. Setup in 5 minutes. Full Professional features during trial."
         }
     },
+    "permissions": {
+        "view_pages": "View Pages",
+        "view_pages_desc": "View content pages",
+        "manage_pages": "Manage Pages",
+        "manage_pages_desc": "Create, edit, and delete content pages",
+        "view_media": "View Media",
+        "view_media_desc": "Browse the media library",
+        "manage_media": "Manage Media",
+        "manage_media_desc": "Upload, edit, and delete media files",
+        "manage_themes": "Manage Themes",
+        "manage_themes_desc": "Configure and customize store themes"
+    },
     "messages": {
         "failed_to_delete_page": "Failed to delete page: {error}",
         "media_updated_successfully": "Media updated successfully",