Fix: Cannot trigger reload after clearup

In scheduled restart, update function runs in task_handler thread, clearup will stop it before it trigger reload.

module/webui/updater.py

@@ -183,9 +183,8 @@ class Updater(Config, Installer):
             with open('./reloadalas', mode='w') as f:
                 f.writelines(names)
             from module.webui.app import clearup
+            self._trigger_reload(2)
             clearup()
-            time.sleep(1.25)
-            self._trigger_reload()
         else:
             self.state = 'failed'
             logger.warning("Update failed")
@@ -194,10 +193,14 @@ class Updater(Config, Installer):
             return False
     
     @staticmethod
-    def _trigger_reload():
-        with open('./reloadflag', mode='w'):
-            # app ended here and uvicorn will restart whole app
-            pass
+    def _trigger_reload(delay=2):
+        def trigger():
+            with open('./reloadflag', mode='w'):
+                # app ended here and uvicorn will restart whole app
+                pass
+        timer = threading.Timer(delay, trigger)
+        timer.daemon = True
+        timer.start()
 
     def schedule_restart(self) -> Generator:
         th: TaskHandler