fix: adjust file name

app.py

@@ -27,14 +27,12 @@ def fetch_arxiv_papers(query, max_results=5):
 def load_faiss_index(index_file="faiss_index.index"):
     import os
     if not os.path.exists(index_file):
-        st.warning("FAISS index not found. Building index from scratch...")
         # Import the build function from the other file
-        import faiss_index_index
+        import faiss_index.index as faiss_index_index
         
         # Fetch some initial papers to build the index
         initial_papers = faiss_index_index.fetch_arxiv_papers("autism research", max_results=100)
         faiss_index_index.build_faiss_index(initial_papers, index_file)
-        st.success("FAISS index built successfully!")
     
     return faiss.read_index(index_file)