Feat/hidden domain (#113)

Summary
新增秘境探索，属于多人活动，每N年触发一次
Closes #105

src/sim/load/load_game.py

@@ -194,6 +194,7 @@ def load_game(save_path: Optional[Path] = None) -> Tuple["World", "Simulator", L
         # 读取世界数据
         world_data = save_data.get("world", {})
         month_stamp = MonthStamp(world_data["month_stamp"])
+        start_year = world_data.get("start_year", 100)
         
         # 计算事件数据库路径。
         events_db_path = get_events_db_path(save_path)
@@ -203,6 +204,7 @@ def load_game(save_path: Optional[Path] = None) -> Tuple["World", "Simulator", L
             map=game_map,
             month_stamp=month_stamp,
             events_db_path=events_db_path,
+            start_year=start_year,
         )
         
         # 恢复世界历史

src/sim/save/save_game.py

@@ -117,6 +117,7 @@ def save_game(
 
         world_data = {
             "month_stamp": int(world.month_stamp),
+            "start_year": world.start_year,
             "existed_sect_ids": [sect.id for sect in existed_sects],
             # 天地灵机
             "current_phenomenon_id": world.current_phenomenon.id if world.current_phenomenon else None,

src/sim/simulator.py

@@ -267,6 +267,10 @@ class Simulator:
         Gathering 结算阶段：
         检查并执行注册的多人聚集事件（如拍卖会、大比等）。
         """
+        # 第一年不触发聚集事件，给予发育缓冲
+        if self.world.month_stamp.get_year() <= self.world.start_year:
+            return []
+
         return await self.world.gathering_manager.check_and_run_all(self.world)
     
     def _phase_update_celestial_phenomenon(self):