Update app.py

app.py

@@ -39,12 +39,12 @@ def text_to_flowchart(steps_text: str) -> str:
     
     # Create the flowchart using SchemDraw
     d = schemdraw.Drawing()
-    d.add(elm.Start(label="Start"))
+    d.add(elm.Roundbox().label("Start"))
     for step in parsed_steps:
         d.add(elm.Arrow())
-        d.add(elm.Process().label(step))
+        d.add(elm.Box().label(step))
     d.add(elm.Arrow())
-    d.add(elm.End(label="End"))
+    d.add(elm.Roundbox().label("End"))
     
     # Render diagram to PNG and encode as a data URL
     buf = io.BytesIO()