平台订单列表：订阅号链接 back 去嵌套并加护栏测试

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

@@ -802,10 +802,11 @@
                     @if($order->siteSubscription)
                         <div>
                             @php
-                                $backUri = request()->getRequestUri();
-                                $subLink = '/admin/site-subscriptions/' . $order->siteSubscription->id . '?' . \Illuminate\Support\Arr::query(['back' => $backUri]);
+                                // 与本页“订单号 -> 详情页 back”口径一致：订阅详情 back 回到本页自身（剔除 back query，避免嵌套）
+                                $subBack = $selfWithoutBack;
+                                $subLink = '/admin/site-subscriptions/' . $order->siteSubscription->id . '?' . \Illuminate\Support\Arr::query(['back' => $subBack]);
                             @endphp
-                            <a href="{{ $subLink }}">{{ $order->siteSubscription->subscription_no }}</a>
+                            <a href="{!! $subLink !!}">{{ $order->siteSubscription->subscription_no }}</a>
                         </div>
                         <div class="muted muted-xs">
                             订阅ID：<a href="{!! request()->fullUrlWithQuery(['site_subscription_id' => $order->siteSubscription->id, 'page' => null]) !!}" class="muted">{{ $order->siteSubscription->id }}</a>