refactor: 不要なシャットダウン処理を削除し、アプリ終了時のテレメトリ送信を簡素化

src-ui/logics/common/useWindow.js

@@ -154,16 +154,8 @@ export const useWindow = () => {
     };
 
     const asyncCloseApp = async () => {
-        // Send shutdown signal to backend before closing the app
-        // This ensures telemetry app_closed event is sent and flushed
-        // Note: Don't await this call, let it run in background (fire-and-forget)
         asyncStdoutToPython("/run/shutdown");
-        
-        // Give backend time to process shutdown and flush telemetry
-        // Tauri sidecar will be terminated when UI closes, so timing is critical
         await new Promise(resolve => setTimeout(resolve, 2000));
-        
-        // Now close the UI window (this will also terminate the backend sidecar)
         await appWindow.close();
     };