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/core/locales/de.json

@@ -76,5 +76,17 @@
         "account_settings": "Kontoeinstellungen",
         "profile": "Profil",
         "settings": "Einstellungen"
+    },
+    "permissions": {
+        "dashboard_view": "Dashboard anzeigen",
+        "dashboard_view_desc": "Zugriff auf das Dashboard und die Übersicht",
+        "settings_view": "Einstellungen anzeigen",
+        "settings_view_desc": "Shop-Konfiguration anzeigen",
+        "settings_edit": "Einstellungen bearbeiten",
+        "settings_edit_desc": "Shop-Konfiguration ändern",
+        "settings_theme": "Theme verwalten",
+        "settings_theme_desc": "Shop-Theme und Erscheinungsbild anpassen",
+        "settings_domains": "Domains verwalten",
+        "settings_domains_desc": "Benutzerdefinierte Domains konfigurieren"
     }
 }

app/modules/core/locales/en.json

@@ -64,6 +64,18 @@
         "save_profile": "Save Profile",
         "profile_updated": "Profile updated successfully"
     },
+    "permissions": {
+        "dashboard_view": "View Dashboard",
+        "dashboard_view_desc": "Access the store dashboard and overview",
+        "settings_view": "View Settings",
+        "settings_view_desc": "View store settings and configuration",
+        "settings_edit": "Edit Settings",
+        "settings_edit_desc": "Modify store settings and configuration",
+        "settings_theme": "Manage Theme",
+        "settings_theme_desc": "Customize the store theme and appearance",
+        "settings_domains": "Manage Domains",
+        "settings_domains_desc": "Configure custom domains for the store"
+    },
     "messages": {
         "failed_to_load_dashboard_data": "Failed to load dashboard data",
         "dashboard_refreshed": "Dashboard refreshed",

app/modules/core/locales/fr.json

@@ -76,5 +76,17 @@
         "account_settings": "Paramètres du compte",
         "profile": "Profil",
         "settings": "Paramètres"
+    },
+    "permissions": {
+        "dashboard_view": "Voir le tableau de bord",
+        "dashboard_view_desc": "Accéder au tableau de bord et à la vue d'ensemble",
+        "settings_view": "Voir les paramètres",
+        "settings_view_desc": "Voir la configuration du magasin",
+        "settings_edit": "Modifier les paramètres",
+        "settings_edit_desc": "Modifier la configuration du magasin",
+        "settings_theme": "Gérer le thème",
+        "settings_theme_desc": "Personnaliser le thème et l'apparence du magasin",
+        "settings_domains": "Gérer les domaines",
+        "settings_domains_desc": "Configurer les domaines personnalisés"
     }
 }

app/modules/core/locales/lb.json

@@ -76,5 +76,17 @@
         "account_settings": "Kont-Astellungen",
         "profile": "Profil",
         "settings": "Astellungen"
+    },
+    "permissions": {
+        "dashboard_view": "Dashboard kucken",
+        "dashboard_view_desc": "Zougang zum Dashboard an der Iwwersiicht",
+        "settings_view": "Astellungen kucken",
+        "settings_view_desc": "Buttek-Konfiguratioun kucken",
+        "settings_edit": "Astellungen änneren",
+        "settings_edit_desc": "Buttek-Konfiguratioun änneren",
+        "settings_theme": "Theme verwalten",
+        "settings_theme_desc": "Buttek-Theme an Ausgesinn upassen",
+        "settings_domains": "Domänen verwalten",
+        "settings_domains_desc": "Personaliséiert Domäne konfiguréieren"
     }
 }

app/modules/core/static/shared/js/store-selector.js

@@ -166,8 +166,9 @@ function initStoreSelector(selectElement, options = {}) {
                 }
 
                 try {
+                    const sep = config.apiEndpoint.includes('?') ? '&' : '?';
                     const response = await apiClient.get(
-                        `${config.apiEndpoint}?search=${encodeURIComponent(query)}&limit=${config.maxOptions}`
+                        `${config.apiEndpoint}${sep}search=${encodeURIComponent(query)}&limit=${config.maxOptions}`
                     );
 
                     const stores = (response.stores || []).map(v => ({