bug fix

app.py

@@ -555,8 +555,10 @@ with gr.Blocks(title="NGT AI Platform", theme=theme, css_paths="style.css") as d
     )
 
 if __name__ == "__main__":
+    is_hf_space = "SPACE_ID" in os.environ
+    port = int(os.environ.get("PORT", 7860)) if is_hf_space else 7862
     demo.launch(
         server_name="0.0.0.0", 
-        server_port=7862, 
+        server_port=port, 
         allowed_paths=["data"]
     )