Update src/app.py

fixed persistence issues with chat log

src/app.py

@@ -26,8 +26,18 @@ if "authentication_status" not in st.session_state or st.session_state["authenti
     
     with login_tab:
         is_logged_in = tracker.check_login()
-        # FIX: Trigger User DB Download ONLY on fresh login
         if is_logged_in:
+            # Check if a different user was previously logged in
+            if "last_user" in st.session_state and st.session_state.last_user != st.session_state.username:
+                # WIPE EVERYTHING
+                st.session_state.messages = []
+                st.session_state.email_draft = ""
+                st.session_state.user_openai_key = None
+                
+            # Update the tracker
+            st.session_state.last_user = st.session_state.username
+            
+            # Download DB and Refresh
             tracker.download_user_db(st.session_state.username)
             st.rerun() # Refresh to show the app
     
@@ -510,7 +520,7 @@ with tab4:
                 # 1. Save temp file
                 temp_path = rag_engine.save_uploaded_file(uploaded_file)
                 
-                # 2. Process into USER'S specific DB (st.session_state.username)
+                # 2. Process locally
                 success, msg = rag_engine.process_and_add_document(
                     temp_path, 
                     st.session_state.username, 
@@ -518,6 +528,10 @@ with tab4:
                 )
                 
                 if success:
+                    # 3. FIX: SYNC TO CLOUD IMMEDIATELY
+                    with st.spinner("Backing up to Cloud..."):
+                        tracker.upload_user_db(st.session_state.username)
+                        
                     st.success(msg)
                     st.rerun() 
                 else:
@@ -560,6 +574,7 @@ with tab4:
                         with st.spinner("Deleting..."):
                             success, msg = rag_engine.delete_document(st.session_state.username, doc['source'])
                             if success:
+                                tracker.upload_user_db(st.session_state.username)
                                 st.success(msg)
                                 st.rerun()
                             else: