Update app.py

app.py

@@ -108,7 +108,7 @@ def dynamic_visualize_graph(graph, start_node, layers=3, top_k=5, show_titles=Fa
 
     visited_nodes = set()
     added_edges = set()
-    current_nodes = [int(start_node)]
+    current_nodes = [str(start_node)]
 
     max_rank = len(rankings) if rankings else 0