Update app.py

app.py

@@ -47,15 +47,25 @@ def download_pdf(text):
 
 # ---------- AI CHATBOT ----------
 def chat(message, history):
+    # Convert Gradio chat history to API messages format
+    messages = []
+    for user_msg, bot_msg in history:
+        messages.append({"role": "user", "content": user_msg})
+        messages.append({"role": "assistant", "content": bot_msg})
+    
+    # Add current user message
+    messages.append({"role": "user", "content": message})
+
     try:
         res = client.chat.completions.create(
             model="llama-3.3-70b-versatile",
-            messages=[{"role": "user", "content": message}]
+            messages=messages
         )
         reply = res.choices[0].message.content
     except Exception as e:
         reply = str(e)
 
+    # Append current turn to history for Gradio display
     history.append((message, reply))
     return history, history
 
@@ -86,5 +96,5 @@ with gr.Blocks() as app:
 
         msg.submit(chat, [msg, state], [chatbot, state])
 
-# Launch app
+# Launch the app
 app.launch()