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/tenancy/services/admin_service.py

@@ -476,12 +476,17 @@ class AdminService:
         search: str | None = None,
         is_active: bool | None = None,
         is_verified: bool | None = None,
+        merchant_id: int | None = None,
     ) -> tuple[list[Store], int]:
         """Get paginated list of all stores with filtering."""
         try:
             # Eagerly load merchant relationship to avoid N+1 queries
             query = db.query(Store).options(joinedload(Store.merchant))
 
+            # Filter by merchant
+            if merchant_id is not None:
+                query = query.filter(Store.merchant_id == merchant_id)
+
             # Apply search filter
             if search:
                 search_term = f"%{search}%"
@@ -501,6 +506,8 @@ class AdminService:
 
             # Get total count (without joinedload for performance)
             count_query = db.query(Store)
+            if merchant_id is not None:
+                count_query = count_query.filter(Store.merchant_id == merchant_id)
             if search:
                 search_term = f"%{search}%"
                 count_query = count_query.filter(