Update app.py

app.py

@@ -24,6 +24,10 @@ def init_session_state():
         st.session_state.current_analysis = None
     if 'current_images' not in st.session_state:
         st.session_state.current_images = []
+    if 'conversation_context' not in st.session_state:
+        st.session_state.conversation_context = []
+    if 'current_conversation_id' not in st.session_state:
+        st.session_state.current_conversation_id = None
 
 def show_chart_analysis_tab(claude_service, analysis_service):
     """Display chart analysis functionality"""