Update src/streamlit_app.py

src/streamlit_app.py

@@ -43,7 +43,7 @@ if 'rag_current_file_key' not in st.session_state:
     st.session_state.rag_current_file_key = None
 if 'batch_current_file_key' not in st.session_state:
     st.session_state.batch_current_file_key = None
-if 'vector_store' not in st.session_state:import base64
+if 'vector_store' not in st.session_state:
     st.session_state.vector_store = None
 if 'json_data_for_batch' not in st.session_state:
     st.session_state.json_data_for_batch = None # 保持 None，因為可能檔案沒上傳