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/customers/locales/en.json

@@ -18,6 +18,16 @@
         "no_customers": "No customers found",
         "search_customers": "Search customers..."
     },
+    "permissions": {
+        "customers_view": "View Customers",
+        "customers_view_desc": "View customer list and details",
+        "customers_edit": "Edit Customers",
+        "customers_edit_desc": "Modify customer information",
+        "customers_delete": "Delete Customers",
+        "customers_delete_desc": "Remove customer records",
+        "customers_export": "Export Customers",
+        "customers_export_desc": "Export customer data to files"
+    },
     "messages": {
         "failed_to_toggle_customer_status": "Failed to toggle customer status",
         "failed_to_load_customer_details": "Failed to load customer details",