Update core/conversational_agent.py

core/conversational_agent.py

@@ -3,7 +3,7 @@ import traceback
 from typing import List, Dict, Any, Tuple, Optional
 from models.schemas import RAGSearchResult
 from core.multilingual_manager import MultilingualManager
-from core.enhanced_rag import EnhancedRAGSystem
+from core.rag_system import EnhancedRAGSystem
 
 class ConversationalAgent:
     """Lớp xử lý hội thoại với grounding từ RAG"""