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/inventory/locales/en.json

@@ -12,6 +12,14 @@
         "low_stock_alert": "Low Stock Alert",
         "out_of_stock_alert": "Out of Stock Alert"
     },
+    "permissions": {
+        "stock_view": "View Inventory",
+        "stock_view_desc": "View stock levels and inventory data",
+        "stock_edit": "Edit Inventory",
+        "stock_edit_desc": "Adjust stock levels and quantities",
+        "stock_transfer": "Transfer Stock",
+        "stock_transfer_desc": "Transfer stock between locations"
+    },
     "messages": {
         "stock_adjusted_successfully": "Stock adjusted successfully",
         "quantity_set_successfully": "Quantity set successfully",