Change simulation_date to string

main.py

@@ -2754,10 +2754,10 @@ async def fastapi_download_history_data_manually(data: Download_History_Data_Man
 class Run_Simulation_Manually_by_Date(BaseModel):
     """
     name：数据库名称
-    simulation_date：样式如 datetime(2025, 5, 4)
+    simulation_date：样式如 2025-05-04
     """
     name: str
-    simulation_date: datetime  
+    simulation_date: str
 
 
 @app.post("/runsimulationmanuallybydate/")
@@ -2786,7 +2786,7 @@ async def fastapi_run_simulation_manually_by_date(data: Run_Simulation_Manually_
             simulation.get_realtime_region_patterns(
             item['name'], globals.source_outflow_region_id, globals.realtime_region_pipe_flow_and_demand_id)
 
-        base_date = item['simulation_date']
+        base_date = datetime.strptime(item['simulation_date'], "%Y-%m-%d")
 
         # 循环生成96个时间点（15分钟间隔）
         for i in range(96):