fix: create dir

web_server.py

@@ -192,6 +192,7 @@ class EnvHandler:
         scene_config = self.scene_list[scene_index]
         self.close()
         self.cur_otuput = os.path.join(self.base_output, scene_config.name)
+        os.makedirs(self.cur_otuput, exist_ok=True)
         self.env = gymnasium.make('hugsim_env/HUGSim-v0', cfg=scene_config.cfg, output=self.cur_otuput)
         self._scene_cnt = 0
         self._scene_done = False