feat: 添加定时任务后台运行和停止功能

新增service_runner.py用于后台运行定时任务，使用pythonw.exe实现无窗口运行
新增stop_scheduler.py用于停止后台定时任务进程
调整scheduler.py中的任务执行时间

scheduler.py

@@ -22,7 +22,7 @@ def run_sendmsg():
 def main():
     """主函数 - 设置定时任务"""
     # 每天17:30执行任务
-    schedule.every().day.at("17:27").do(run_sendmsg)
+    schedule.every().day.at("17:40").do(run_sendmsg)
     
     print(f"[{datetime.now()}] 定时任务已启动，将在每天17:30执行sendmsg.py")
     print("按Ctrl+C停止程序")

service_runner.py

@@ -0,0 +1,20 @@
+import subprocess
+import sys
+import os
+from pathlib import Path
+
+def run_in_background():
+    """在后台运行定时任务"""
+    script_path = Path(__file__).parent / "scheduler.py"
+    
+    # 使用pythonw.exe在后台运行（无窗口）
+    pythonw_path = sys.executable.replace('python.exe', 'pythonw.exe')
+    
+    subprocess.Popen([pythonw_path, str(script_path)], 
+                    cwd=str(Path(__file__).parent),
+                    creationflags=subprocess.CREATE_NO_WINDOW)
+    
+    print("定时任务已在后台启动")
+
+if __name__ == "__main__":
+    run_in_background()

stop_scheduler.py

@@ -0,0 +1,25 @@
+import subprocess
+import sys
+import os
+
+def stop_scheduler():
+    """停止定时任务进程"""
+    try:
+        # 查找并结束scheduler.py进程
+        result = subprocess.run(['tasklist', '/FI', 'IMAGENAME eq pythonw.exe', '/FO', 'CSV'], 
+                              capture_output=True, text=True)
+        
+        if 'scheduler.py' in result.stdout:
+            # 结束包含scheduler.py的pythonw进程
+            subprocess.run(['taskkill', '/F', '/IM', 'pythonw.exe'], check=True)
+            print("定时任务已停止")
+        else:
+            print("未找到运行中的定时任务")
+            
+    except subprocess.CalledProcessError as e:
+        print(f"停止进程时出错: {e}")
+    except Exception as e:
+        print(f"发生错误: {e}")
+
+if __name__ == "__main__":
+    stop_scheduler()