fix: remove UI button section, fix _path→path, show folder in file pickers

backend/api/actions_api.py

@@ -45,7 +45,7 @@ DEFAULT_ACTION: dict = {
 
 
 def _presets_dir(request: Request) -> Path:
-    base = Path(request.app.state.config_service._path).parent.parent / "data" / "action_presets"
+    base = Path(request.app.state.config_service.path).parent.parent / "data" / "action_presets"
     base.mkdir(parents=True, exist_ok=True)
     return base