Fix syntax error in app.py - properly structure try/except/finally blocks

app.py

@@ -511,7 +511,8 @@ if user_input and not st.session_state.is_processing:
                     "content": f"⚠️ {user_msg}",
                     "timestamp": datetime.now().strftime("%H:%M:%S")
                 })
-        finally:
+            
+            # Moved finally block to proper location
             st.session_state.is_processing = False
             time.sleep(0.5)  # Brief pause
             st.experimental_rerun()