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/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",