chore: release client-v1.0.61

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

client/lib/core/auth/auth_state.dart

@@ -3,6 +3,7 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import '../config/app_config.dart';
+import '../config/app_constants.dart';
 
 const _kAccessToken = 'access_token';
 const _kRefreshToken = 'refresh_token';
@@ -153,8 +154,8 @@ class AuthNotifier extends StateNotifier<AuthState> {
       try {
         await Dio(BaseOptions(
           baseUrl: AppConfig.apiBaseUrl,
-          connectTimeout: const Duration(seconds: 4),
-          receiveTimeout: const Duration(seconds: 4),
+          connectTimeout: AppConstants.authProbeTimeout,
+          receiveTimeout: AppConstants.authProbeTimeout,
           headers: {'Authorization': 'Bearer $token'},
         )).post('/auth/logout');
       } catch (_) {