Update app.py

app.py

@@ -309,9 +309,12 @@ def chat_with_groq(message, history, risk_level="Unknown"):
     messages = [{"role": "system", "content": SYSTEM_PROMPT}]
     messages.append({"role": "system", "content": f"Patient current CKD risk level: {risk_level}"})
 
-    for human, assistant in history:
-        messages.append({"role": "user",      "content": human})
-        messages.append({"role": "assistant", "content": assistant})
+    for item in history:
+    if isinstance(item, dict):
+        messages.append({"role": item["role"], "content": item["content"]})
+    elif isinstance(item, (list, tuple)) and len(item) == 2:
+        messages.append({"role": "user",      "content": item[0]})
+        messages.append({"role": "assistant", "content": item[1]})
 
     messages.append({"role": "user", "content": message})
 
@@ -486,7 +489,8 @@ with gr.Blocks(
         if not message.strip():
             return history, ""
         bot_response = chat_with_groq(message, history)
-        history.append((message, bot_response))
+        history.append({"role": "user",      "content": message})
+        history.append({"role": "assistant", "content": bot_response})
         return history, ""
 
     send_btn.click(