fix: resolver conflicto de merge en signatures.ts

Restaura la construcción correcta de URLSearchParams en getSignatures,
eliminando el spread de filters inválido y el cierre de objeto roto.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/api/v1/modules/a76/general_catalogs/multi_currency_types/routes.py

@@ -16,6 +16,7 @@ multi_currency_type_crud = TenantCRUDRoutes(
     tags=["Multi Currency Types"],
     resource_name="MultiCurrencyType",
     enable_list=True,
+    enable_filters=True,
     list_permissions=["cat_multi_currency_types.view"],
     get_permissions=["cat_multi_currency_types.view"],
     create_permissions=["cat_multi_currency_types.create"],

backend/api/v1/modules/a76/general_catalogs/multi_currency_types/service.py

@@ -22,8 +22,14 @@ class MultiCurrencyTypeService:
         )
 
         if filters:
-            # Add filters here if needed
-            pass
+            if filters.get('currency_type_code'):
+                query = query.filter(
+                    MultiCurrencyType.currency_type_code.ilike(f"%{filters['currency_type_code']}%")
+                )
+            if filters.get('country_key'):
+                query = query.filter(
+                    MultiCurrencyType.country_key.ilike(f"%{filters['country_key']}%")
+                )
 
         total = query.count()
         items = query.offset(skip).limit(limit).all()