Update graph.py

graph.py

@@ -166,9 +166,10 @@ class EssayWriter:
             dot.edge("Edit Essay", "✅ Done")
             dot.edge("Answer", "✅ Done")
 
-            # Save Graph
-            dot.render("graph")  # Saves as 'graph.png'
+            # Save Graph explicitly in PNG format
+            dot.render("graph", format="png", cleanup=True)
 
         except Exception as e:
             print(f"❌ Error generating workflow visualization: {e}")
 
+