ui(site-subscriptions): add return-to-order header in attach order mode

resources/views/admin/site_subscriptions/index.blade.php

@@ -47,7 +47,17 @@
         </div>
 
         <div class="page-header-actions">
-            @if($safeBackForLinks !== '')
+            @if($attachOrderId > 0)
+                @php
+                    // attach_back 优先（从订单详情跳来），否则 fallback 到订单详情自身
+                    $attachBackUrl = $safeAttachBackForLinks;
+                    if ($attachBackUrl === '') {
+                        $attachBackUrl = '/admin/platform-orders/' . $attachOrderId;
+                    }
+                @endphp
+                <span class="badge">绑定订阅到订单：#{{ $attachOrderId }}</span>
+                <a href="{!! $attachBackUrl !!}" class="btn btn-secondary btn-sm">返回订单详情</a>
+            @elseif($safeBackForLinks !== '')
                 <a href="{!! $safeBackForLinks !!}" class="btn btn-secondary btn-sm">返回上一页（保留上下文）</a>
             @endif
         </div>