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/payments/locales/en.json

@@ -5,6 +5,14 @@
   "payments": {
     "title": "Payments"
   },
+  "permissions": {
+    "view_gateways": "View Gateways",
+    "view_gateways_desc": "View payment gateway configurations",
+    "manage_gateways": "Manage Gateways",
+    "manage_gateways_desc": "Configure and manage payment gateways",
+    "view_transactions": "View Transactions",
+    "view_transactions_desc": "View payment transaction history"
+  },
   "messages": {
     "payment_successful": "Payment processed successfully",
     "payment_failed": "Payment processing failed"