Update app.py

app.py

@@ -472,10 +472,6 @@ Answer the question using the knowledge above. Be specific and helpful (150-250
         logger.error(f"  ✗ Generation error: {e}")
         return None
 
-def synthesize_direct_answer(
-    query: str,
-    retrieved_docs: List[Document]
-) -> str:
 def synthesize_direct_answer(
     query: str,
     retrieved_docs: List[Document]
@@ -504,6 +500,10 @@ def synthesize_direct_answer(
     answer = f"Based on fashion guidelines: {answer}"
     
     return answer
+
+def generate_answer_langchain(
+    query: str,
+    vectorstore,
     llm_client
 ) -> str:
     """