fix

main.py

@@ -652,7 +652,9 @@ setInterval(tick, 500);
             )
             try:
                 if not question_text.strip():
-                    chat_history.append([question_text, "Please enter a question."])
+                   
+                    chat_history.append({"role": "user", "content": question_text})
+                    chat_history.append({"role": "assistant", "content": "Please enter a question."})
                     yield (
                         chat_history,
                         gr.update(visible=False),
@@ -664,9 +666,10 @@ setInterval(tick, 500);
                         gr.update(value="", visible=False)
                     )
                     return
-                if not uploaded_files:
-                    
-                    chat_history.append([question_text,  "Please upload at least one document."])
+                if not uploaded_files:                         
+                  
+                    chat_history.append({"role": "user", "content": question_text})
+                    chat_history.append({"role": "assistant", "content": "Please upload at least one document."})
                     yield (
                         chat_history,
                         gr.update(visible=False),
@@ -790,7 +793,9 @@ setInterval(tick, 500);
                 verification = result.get("verification_report", "No verification details available.")
                 logger.info(f"Verification (internal):\n{verification}")
                 # Do not display verification to user, only use internally
-                chat_history.append([question_text, f"**Answer:**\n{answer}"])
+               
+                chat_history.append({"role": "user", "content": question_text})
+                chat_history.append({"role": "assistant", "content": f"**Answer:**\n{answer}"})
                 session_state.value["last_documents"] = retriever.invoke(question_text)
                 yield (
                     chat_history,
@@ -818,7 +823,9 @@ setInterval(tick, 500);
             except Exception as e:
                 logger.error(f"Processing error: {e}", exc_info=True)
                
-                chat_history.append([question_text, f"Error: {str(e)}"])
+               
+                chat_history.append({"role": "user", "content": question_text})
+                chat_history.append({"role": "assistant", "content": f"Error: {str(e)}"})
                 yield (
                     chat_history,
                     gr.update(visible=False),
@@ -891,7 +898,7 @@ setInterval(tick, 500);
     if is_hf_space:
         # Hugging Face Spaces configuration
         logger.info("Running on Hugging Face Spaces")
-        demo.launch(server_name="0.0.0.0", server_port=7860, js=js, css=css)
+        demo.launch(server_name="0.0.0.0", server_port=7860, css=css, js=js)
     else:
         # Local development configuration
         configured_port = int(os.environ.get("GRADIO_SERVER_PORT", "7860"))