Refactor refresh functionality in app.py to retrieve checkpoints and scripts together

Update the _refresh_all function to collect both checkpoints and scripts from the latest dataset directory, improving the efficiency of the refresh process. Modify the UI button to reflect these changes, enhancing user experience by providing comprehensive access to training resources.

app.py

@@ -1034,18 +1034,26 @@ def build_ui() -> gr.Blocks:
                     outputs=[logs, ckpt_files, scripts_files],
                 )
 
-                # 回収ボタン: 直近の dataset_ ディレクトリからファイルを再取得
-                def _refresh_scripts() -> List[str]:
+                # 回収ボタン: 直近の dataset_ ディレクトリからチェックポイントとスクリプト/設定を再取得
+                def _refresh_all() -> tuple:
                     try:
                         ds_dir = _find_latest_dataset_dir(DATA_ROOT_RUNTIME)
-                        return _collect_scripts_and_config(ds_dir)
                     except Exception:
-                        return _collect_scripts_and_config(None)
+                        ds_dir = None
+                    try:
+                        ck = _list_checkpoints(ds_dir) if ds_dir else []
+                    except Exception:
+                        ck = []
+                    try:
+                        sc = _collect_scripts_and_config(ds_dir)
+                    except Exception:
+                        sc = _collect_scripts_and_config(None)
+                    return ck, sc
 
                 refresh_scripts_btn.click(
-                    fn=_refresh_scripts,
+                    fn=_refresh_all,
                     inputs=[],
-                    outputs=[scripts_files],
+                    outputs=[ckpt_files, scripts_files],
                 )
 
             with gr.TabItem("Prompt Generator"):