chore: release client-v1.0.71

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

client/lib/widgets/order_row_actions.dart

@@ -24,7 +24,9 @@ List<Widget> buildOrderRowActions({
   required VoidCallback onApprove,
   required VoidCallback onReject,
   required VoidCallback onWithdraw,
+  required VoidCallback onReturn,
   bool canWithdraw = false,
+  bool canReturn = false,
   List<Widget> afterPrint = const [],
 }) {
   TextButton btn(String text, Color color, VoidCallback onPressed, {Key? key}) =>
@@ -39,6 +41,11 @@ List<Widget> buildOrderRowActions({
     ...afterPrint,
     if (!readonly && status == 'approved')
       WriteGuard(child: btn('结清', AppTheme.accent, onSettle)),
+    // 退单（已审核单退货）：error 样式，按权限显示
+    if (!readonly && status == 'approved' && canReturn)
+      WriteGuard(
+          child: btn('退单', AppTheme.danger, onReturn,
+              key: Key('btn_return_$orderId'))),
     if (!readonly && status == 'draft') ...[
       WriteGuard(child: btn('修改', AppTheme.primary, onEdit)),
       WriteGuard(child: btn('删除', AppTheme.danger, onDelete)),