Update app.py

app.py

@@ -59,7 +59,7 @@ def process_file(file):
     else:
         file_path = file
         
-    if file_path.lower().endswith('.pdf'):
+    if file_path.lower().endswith('pdf'):
         doc_state.doc_type = 'pdf'
         doc_state.current_doc_images, doc_state.current_doc_text = process_pdf_file(file_path)
         return f"PDF processed. Total pages: {len(doc_state.current_doc_images)}. You can now ask questions about the content."