Fix app file

app/app.py

@@ -292,7 +292,7 @@ def voice_chat():
         
         # LLM 호출: 질문과 컨텍스트를 바탕으로 응답 생성
         prompt = f"질문: {transcription}\n\n컨텍스트:\n{context}\n\n답변:"
-        answer = llm.generate(prompt)
+        answer = llm_client.generate(prompt)
         
         if not answer:
             logger.error("LLM 응답 생성 실패")
@@ -304,7 +304,7 @@ def voice_chat():
         return jsonify({
             "transcription": transcription,
             "answer": answer,
-            "sources": sources  # [{ "content": "...", "metadata": {...} }, ...]
+            "sources": sources  # [{ "text": "...", "metadata": {...} }, ...]
         })
     
     except Exception as e: