Update app.py

app.py

@@ -89,10 +89,12 @@ def process_pdf(pdf_file):
     # combine text chunks and image captions
     docs = chunks + captions
 
-    # embed and index
+        # embed and index
     vectors = embeddings.embed_documents(docs)
-    index = FAISS.from_embeddings(vectors, docs)
-    retriever = index.as_retriever(search_kwargs={"k":2})
+    # FAISS.from_embeddings expects list of (text, embedding) pairs
+    pairs = list(zip(docs, vectors))
+    index = FAISS.from_embeddings(pairs)
+    retriever = index.as_retriever(search_kwargs={"k":2})(search_kwargs={"k":2})
 
     status = f"✅ Indexed — {len(chunks)} text chunks + {len(captions)} captions"
     return os.path.basename(pdf_file.name), status, gr.update(interactive=True)