platform order show: add link to subscriptions when renewal missing subscription

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

@@ -259,6 +259,15 @@
             // 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);
+
+            $missingSubscriptionHelpUrl = '';
+            if ($syncBlockedByMissingSubscriptionOnRenewal) {
+                $missingSubscriptionHelpUrl = \App\Support\BackUrl::withBack('/admin/site-subscriptions?' . \Illuminate\Support\Arr::query([
+                    'merchant_id' => (int) ($order->merchant_id ?? 0) ?: null,
+                    'plan_id' => (int) ($order->plan_id ?? 0) ?: null,
+                    'page' => null,
+                ]), $orderShowSelf);
+            }
         @endphp
         <form method="post" action="/admin/platform-orders/{{ $order->id }}/activate-subscription" onsubmit="return confirm('确认同步订阅？将根据该订单创建/续期订阅');">
             @csrf
@@ -281,6 +290,10 @@
                             当前订单类型为「续费」，但未绑定订阅（site_subscription_id 为空）。
                             <span class="muted">｜</span>
                             <span class="muted">请先补齐订阅关联后再重试同步。</span>
+                            @if($missingSubscriptionHelpUrl !== '')
+                                <span class="muted">｜</span>
+                                <a class="btn btn-secondary btn-sm" href="{!! $missingSubscriptionHelpUrl !!}">去订阅管理查找订阅</a>
+                            @endif
                         </div>
                     @endif
                     <div class="mt-6">