Update app.py

app.py

@@ -145,14 +145,18 @@ def chat(user_input, history):
     global chat_history
     
     # Build full context (PDF + conversation history)
-full_context = "\n".join([
-    f"User: {h['user']}\nBot: {h['bot']}"
-    for h in chat_history[-5:]
-]) if chat_history else "" 
-answer = generate_answer(user_input, full_context)
+    full_context = "\n".join([
+        f"User: {h['user']}\nBot: {h['bot']}"
+        for h in chat_history[-5:]
+    ]) if chat_history else ""
+    
+    answer = generate_answer(user_input, full_context)
     
     # Store in memory
-    chat_history.append({"user": user_input, "bot": answer})
+    chat_history.append({
+        "user": user_input,
+        "bot": answer
+    })
     
     # Update UI history
     new_history = history + [
@@ -161,7 +165,6 @@ answer = generate_answer(user_input, full_context)
     ]
     
     return new_history, new_history
-
 def generate_answer(query, conversation_context=""):
     if index is None:
         return "⚠️ Please load a PDF first."