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/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 => ({