chore: release client-v1.0.61

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/lib/core/update/app_updater_io.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 import 'package:dio/dio.dart';
 import 'package:path_provider/path_provider.dart';
+import '../config/app_constants.dart';
 
 // 桌面/原生平台的应用内更新实现。Web 版见 app_updater_web.dart。
 
@@ -34,7 +35,7 @@ Future<void> downloadAndInstall(
     await dio.download(url, exe, onReceiveProgress: prog);
     // 启动 Inno Setup 安装包后退出本应用，让其覆盖安装。
     await Process.start(exe, const [], mode: ProcessStartMode.detached);
-    await Future<void>.delayed(const Duration(milliseconds: 400));
+    await Future<void>.delayed(AppConstants.updaterStepDelay);
     exit(0);
   }
 
@@ -75,7 +76,7 @@ else
 fi
 ''');
     await Process.start('/bin/sh', [script], mode: ProcessStartMode.detached);
-    await Future<void>.delayed(const Duration(milliseconds: 400));
+    await Future<void>.delayed(AppConstants.updaterStepDelay);
     exit(0);
   }