fix save bugs

src/classes/action/action.py

@@ -69,6 +69,14 @@ class Action(ABC):
         """
         return str(self.__class__.__name__)
 
+    def get_save_data(self) -> dict:
+        """获取需要存档的运行时数据"""
+        return {}
+
+    def load_save_data(self, data: dict) -> None:
+        """加载运行时数据"""
+        pass
+
 
 class DefineAction(Action):
     def __init__(self, avatar: Avatar, world: World):
@@ -99,6 +107,24 @@ class DefineAction(Action):
         """
         pass
 
+    def get_save_data(self) -> dict:
+        data = super().get_save_data()
+        # 很多长态动作（包括MoveToDirection）都会设置此属性
+        if hasattr(self, 'start_monthstamp'):
+            val = self.start_monthstamp
+            data['start_monthstamp'] = int(val) if val is not None else None
+        return data
+
+    def load_save_data(self, data: dict) -> None:
+        super().load_save_data(data)
+        if 'start_monthstamp' in data:
+            val = data['start_monthstamp']
+            if val is not None:
+                from src.classes.calendar import MonthStamp
+                self.start_monthstamp = MonthStamp(val)
+            else:
+                self.start_monthstamp = None
+
 
 class LLMAction(Action):
     """
@@ -199,5 +225,3 @@ class TimedAction(DefineAction, ActualActionMixin):
         self._execute(**params_for_execute)
         done = (self.world.month_stamp - self.start_monthstamp) >= (self.duration_months - 1)
         return ActionResult(status=(ActionStatus.COMPLETED if done else ActionStatus.RUNNING), events=[])
-
-

src/sim/load/avatar_load_mixin.py

@@ -182,15 +182,20 @@ class AvatarLoadMixin:
         avatar.planned_actions = [ActionPlan.from_dict(plan_data) for plan_data in planned_actions_data]
         
         # 重建current_action（如果有）
-        current_action_data = data.get("current_action")
-        if current_action_data is not None:
+        current_action_dict = data.get("current_action")
+        if current_action_dict is not None:
             try:
-                action = avatar.create_action(current_action_data["action_name"])
+                action = avatar.create_action(current_action_dict["action_name"])
+                
+                # 恢复动作内部状态
+                if "state" in current_action_dict:
+                    action.load_save_data(current_action_dict["state"])
+                
                 from src.classes.action_runtime import ActionInstance
                 avatar.current_action = ActionInstance(
                     action=action,
-                    params=current_action_data["params"],
-                    status=current_action_data["status"]
+                    params=current_action_dict["params"],
+                    status=current_action_dict["status"]
                 )
             except Exception:
                 # 如果动作无法重建，跳过（容错）

src/sim/save/avatar_save_mixin.py

@@ -42,7 +42,8 @@ class AvatarSaveMixin:
             current_action_dict = {
                 "action_name": self.current_action.action.__class__.__name__,
                 "params": self.current_action.params,
-                "status": self.current_action.status
+                "status": self.current_action.status,
+                "state": self.current_action.action.get_save_data()
             }
         
         # 序列化planned_actions