Fix import issue in app.py by using session_manager instead of non-existent get_conversation_history

app.py

@@ -7,7 +7,7 @@ sys.path.append(str(Path(__file__).parent))
 
 from utils.config import config
 from core.llm import send_to_ollama, send_to_hf
-from core.memory import get_conversation_history
+from core.session import session_manager
 
 st.set_page_config(page_title="AI Life Coach", page_icon="🧠", layout="wide")
 
@@ -79,7 +79,8 @@ if send_button and user_input.strip():
     st.session_state.messages.append({"role": "user", "content": user_input})
     
     # Get conversation history
-    conversation = get_conversation_history("default_user")
+    user_session = session_manager.get_session("default_user")
+    conversation = user_session.get("conversation", [])
     conversation_history = conversation[-5:]  # Last 5 messages
     conversation_history.append({"role": "user", "content": user_input})
     
@@ -111,6 +112,10 @@ if send_button and user_input.strip():
                 conversation.append({"role": "user", "content": user_input})
                 conversation.append({"role": "assistant", "content": ai_response})
                 
+                # Update session
+                user_session["conversation"] = conversation
+                session_manager.save_session("default_user", user_session)
+                
                 # Add assistant response to history
                 st.session_state.messages.append({"role": "assistant", "content": ai_response})
             else: