refactor: unify command shutdown ownership

app/startup/initializers/command.py

@@ -14,13 +14,6 @@ def init_command():
     Command()
 
 
-def stop_command():
-    """
-    停止命令
-    """
-    pass
-
-
 def restart_command() -> Future:
     """
     重建命令并返回完成信号。

app/startup/lifecycle/__init__.py

@@ -37,7 +37,7 @@ from app.runtime.tasks import TaskRegistry, configure_task_registry
 from app.adapters.external.server import MoviePilotServerHelper
 from app.runtime.state import SystemHelper
 from app.runtime.log import logger, LoggerManager
-from app.startup.initializers.command import init_command, stop_command, restart_command
+from app.startup.initializers.command import init_command, restart_command
 from app.startup.initializers.agent import stop_agent
 from app.startup.initializers.domain import configure_domain_dependencies
 from app.startup.initializers.modules import (
@@ -469,11 +469,8 @@ def build_lifecycle_components(app: FastAPI) -> tuple[LifecycleComponent, ...]:
             dependencies=("待处理整理回放",),
             mode=LifecycleMode.NORMAL_ONLY,
             start=init_command,
-            stop=stop_command,
             start_order=130,
-            stop_order=30,
             start_timeout_seconds=120,
-            stop_timeout_seconds=120,
         ),
         LifecycleComponent(
             name="工作流",