platform order show: disable activate subscription for renewal missing subscription

resources/views/admin/platform_orders/show.blade.php

@@ -256,6 +256,9 @@
 
         @php
             $syncBlockedByGovernance = $order->isReconcileMismatch() || $order->isRefundInconsistent();
+            // 安全阀：续费单必须绑定订阅（后端 activateSubscription 也会阻断，这里做前端提示/禁用）
+            $syncBlockedByMissingSubscriptionOnRenewal = ((string) ($order->order_type ?? '') === 'renewal')
+                && ((int) ($order->site_subscription_id ?? 0) <= 0);
         @endphp
         <form method="post" action="/admin/platform-orders/{{ $order->id }}/activate-subscription" onsubmit="return confirm('确认同步订阅？将根据该订单创建/续期订阅');">
             @csrf
@@ -265,14 +268,21 @@
                     ? '已同步'
                     : ($hasSyncErrorMeta ? '重试同步订阅' : '同步订阅');
             @endphp
-            <button class="btn btn-secondary btn-sm" type="submit" @disabled(! $canActivate || $alreadySynced || $syncBlockedByGovernance)>{{ $activateBtnLabel }}</button>
+            <button class="btn btn-secondary btn-sm" type="submit" @disabled(! $canActivate || $alreadySynced || $syncBlockedByGovernance || $syncBlockedByMissingSubscriptionOnRenewal)>{{ $activateBtnLabel }}</button>
         </form>
 
-        @if($syncBlockedByGovernance)
+        @if($syncBlockedByGovernance || $syncBlockedByMissingSubscriptionOnRenewal)
             <div class="card governance-block">
                 <div class="muted text-danger governance-block-title"><strong>同步订阅治理提示</strong>（当前不建议/不可直接同步）</div>
                 <div class="muted governance-block-body">
                     <div>当前订单命中「对账不一致/退款不一致」。为避免把“带病订单”同步到订阅，请先完成金额/状态治理。</div>
+                    @if($syncBlockedByMissingSubscriptionOnRenewal)
+                        <div class="mt-6">
+                            当前订单类型为「续费」，但未绑定订阅（site_subscription_id 为空）。
+                            <span class="muted">｜</span>
+                            <span class="muted">请先补齐订阅关联后再重试同步。</span>
+                        </div>
+                    @endif
                     <div class="mt-6">
                         @if($order->isReconcileMismatch())
                             @php