Update app.py

app.py

@@ -633,7 +633,7 @@ else:
     dates = [date1, date2, date3]
     active = [(m, d) for m, d in zip(messages, dates) if m.strip()]
     if not active:
-    return "Please enter at least one message."
+        return "Please enter at least one message."
 
     # Run model on messages
     results = [(analyze_single_message(m, THRESHOLDS.copy()), d) for m, d in active]