chore: release client-v1.0.69

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YZ4DskSRKsSiheQonFtQvx

client/lib/core/auth/auth_state.dart

@@ -194,3 +194,10 @@ final isReadonlyProvider = Provider<bool>((ref) {
   final role = ref.watch(authStateProvider.select((s) => s.user?.role));
   return role == 'readonly';
 });
+
+/// 当前登录用户是否为管理员（role == 'admin'）。
+/// 用于「撤回审核中单据」等仅管理员可用的操作；后端 middleware.AdminOnly() 兜底。
+final isAdminProvider = Provider<bool>((ref) {
+  final role = ref.watch(authStateProvider.select((s) => s.user?.role));
+  return role == 'admin';
+});