Fix process_dd value and choices assignment to use dictionary methods for better handling of initialization

app.py

@@ -710,8 +710,8 @@ with gr.Blocks(css="""
     # 1) 既定CSVの自動ロード
     init_msg, init_proc_update, _ = initialize_default_csv()
     status_csv.value = init_msg
-    process_dd.value = init_proc_update.value
-    process_dd.choices = init_proc_update.choices
+    process_dd.value = init_proc_update.get('value')
+    process_dd.choices = init_proc_update.get('choices', [])
 
     # 2) CSVアップロードで更新
     csv_uploader.change(