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/billing/locales/de.json

@@ -134,5 +134,17 @@
         "invoices": "Rechnungen",
         "account_settings": "Kontoeinstellungen",
         "billing": "Abrechnung"
+    },
+    "permissions": {
+        "view_tiers": "Tarife anzeigen",
+        "view_tiers_desc": "Details der Abonnement-Tarife anzeigen",
+        "manage_tiers": "Tarife verwalten",
+        "manage_tiers_desc": "Abonnement-Tarife erstellen und konfigurieren",
+        "view_subscriptions": "Abonnements anzeigen",
+        "view_subscriptions_desc": "Abonnementdetails anzeigen",
+        "manage_subscriptions": "Abonnements verwalten",
+        "manage_subscriptions_desc": "Abonnements und Abrechnung verwalten",
+        "view_invoices": "Rechnungen anzeigen",
+        "view_invoices_desc": "Rechnungen und Abrechnungsverlauf anzeigen"
     }
 }

app/modules/billing/locales/en.json

@@ -81,6 +81,18 @@
         "current": "Current Plan",
         "recommended": "Recommended"
     },
+    "permissions": {
+        "view_tiers": "View Tiers",
+        "view_tiers_desc": "View subscription tier details",
+        "manage_tiers": "Manage Tiers",
+        "manage_tiers_desc": "Create and configure subscription tiers",
+        "view_subscriptions": "View Subscriptions",
+        "view_subscriptions_desc": "View store subscription details",
+        "manage_subscriptions": "Manage Subscriptions",
+        "manage_subscriptions_desc": "Manage store subscriptions and billing",
+        "view_invoices": "View Invoices",
+        "view_invoices_desc": "View billing invoices and history"
+    },
     "messages": {
         "subscription_updated": "Subscription updated successfully",
         "tier_created": "Tier created successfully",

app/modules/billing/locales/fr.json

@@ -134,5 +134,17 @@
         "invoices": "Factures",
         "account_settings": "Paramètres du compte",
         "billing": "Facturation"
+    },
+    "permissions": {
+        "view_tiers": "Voir les niveaux",
+        "view_tiers_desc": "Voir les détails des niveaux d'abonnement",
+        "manage_tiers": "Gérer les niveaux",
+        "manage_tiers_desc": "Créer et configurer les niveaux d'abonnement",
+        "view_subscriptions": "Voir les abonnements",
+        "view_subscriptions_desc": "Voir les détails des abonnements",
+        "manage_subscriptions": "Gérer les abonnements",
+        "manage_subscriptions_desc": "Gérer les abonnements et la facturation",
+        "view_invoices": "Voir les factures",
+        "view_invoices_desc": "Voir les factures et l'historique de facturation"
     }
 }

app/modules/billing/locales/lb.json

@@ -134,5 +134,17 @@
         "invoices": "Rechnungen",
         "account_settings": "Kont-Astellungen",
         "billing": "Ofrechnung"
+    },
+    "permissions": {
+        "view_tiers": "Tariffer kucken",
+        "view_tiers_desc": "Detailer vun den Abonnement-Tariffer kucken",
+        "manage_tiers": "Tariffer verwalten",
+        "manage_tiers_desc": "Abonnement-Tariffer erstellen a konfiguréieren",
+        "view_subscriptions": "Abonnementer kucken",
+        "view_subscriptions_desc": "Abonnementdetailer kucken",
+        "manage_subscriptions": "Abonnementer verwalten",
+        "manage_subscriptions_desc": "Abonnementer an Ofrechnung verwalten",
+        "view_invoices": "Rechnunge kucken",
+        "view_invoices_desc": "Rechnungen an Ofrechnungsverlaf kucken"
     }
 }