Update ui/tabs.py

ui/tabs.py

@@ -68,7 +68,7 @@ def create_cag_tab(rag_system, multilingual_manager):
     """Tạo tab Cache-Augmented Generation"""
     
     # Import CAG service
-    from core.cag_service import CAGService
+    from core.cag_system import CAGService
     
     # Initialize CAG service
     cag_service = CAGService(rag_system, multilingual_manager)