Update app.py

app.py

@@ -23,6 +23,8 @@ from optimum_encoder import OptimumEncoder
 from huggingface_hub import snapshot_download
 from streamlit_navigation_bar import st_navbar
 from ppt_chunker import ppt_chunk
+from unstructured.cleaners.core import clean
+from unstructured.partition.pptx import partition_pptx
 from fastembed import SparseEmbedding, SparseTextEmbedding
 from unstructured.nlp.tokenize import download_nltk_packages
 from scipy.sparse import csr_matrix, save_npz, load_npz, vstack