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/checkout/locales/lb.json

@@ -1,20 +1,26 @@
 {
-  "storefront": {
-    "welcome": "Wëllkomm an eisem Buttek",
-    "browse_products": "Produkter duerchsichen",
-    "add_to_cart": "An de Kuerf",
-    "buy_now": "Elo kafen",
-    "view_cart": "Kuerf kucken",
-    "checkout": "Bezuelen",
-    "continue_shopping": "Weider akafen",
-    "start_shopping": "Ufänken mat Akafen",
-    "empty_cart": "Äre Kuerf ass eidel",
-    "cart_total": "Kuerf Total",
-    "proceed_checkout": "Zur Bezuelung goen",
-    "payment": "Bezuelung",
-    "place_order": "Bestellung opgi",
-    "order_placed": "Bestellung erfollegräich opginn",
-    "thank_you": "Merci fir Är Bestellung",
-    "order_confirmation": "Bestellungsbestätegung"
-  }
+    "storefront": {
+        "welcome": "Wëllkomm an eisem Buttek",
+        "browse_products": "Produkter duerchsichen",
+        "add_to_cart": "An de Kuerf",
+        "buy_now": "Elo kafen",
+        "view_cart": "Kuerf kucken",
+        "checkout": "Bezuelen",
+        "continue_shopping": "Weider akafen",
+        "start_shopping": "Ufänken mat Akafen",
+        "empty_cart": "Äre Kuerf ass eidel",
+        "cart_total": "Kuerf Total",
+        "proceed_checkout": "Zur Bezuelung goen",
+        "payment": "Bezuelung",
+        "place_order": "Bestellung opgi",
+        "order_placed": "Bestellung erfollegräich opginn",
+        "thank_you": "Merci fir Är Bestellung",
+        "order_confirmation": "Bestellungsbestätegung"
+    },
+    "permissions": {
+        "view_settings": "Keess-Astellunge kucken",
+        "view_settings_desc": "Keess-Konfiguratioun kucken",
+        "manage_settings": "Keess-Astellunge verwalten",
+        "manage_settings_desc": "Keessprozess an Optiounen konfiguréieren"
+    }
 }