Enhance: subscription show merchant/plan links keep back to show

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

@@ -26,6 +26,22 @@
     };
 @endphp
 
+@php
+    // 用于构建“保留当前上下文”的订阅列表跳转链接（从订阅详情跳回列表后可一键返回本订阅详情）
+    $subscriptionShowSelf = '/' . ltrim(request()->path(), '/');
+    $subscriptionShowQuery = request()->query();
+    unset($subscriptionShowQuery['back']);
+    if (count($subscriptionShowQuery) > 0) {
+        $subscriptionShowSelf .= '?' . \Illuminate\Support\Arr::query($subscriptionShowQuery);
+    }
+
+    $makeSubscriptionIndexUrl = function (array $query) use ($subscriptionShowSelf) {
+        $query = $query + ['back' => $subscriptionShowSelf];
+
+        return '/admin/site-subscriptions?' . \Illuminate\Support\Arr::query($query);
+    };
+@endphp
+
 <div class="card mb-20">
     <p class="muted muted-tight">
         这里是总台视角的订阅详情页，用于运营排查“订阅状态/到期/关联平台订单/同步记录”。
@@ -44,7 +60,7 @@
             <div class="muted">站点</div>
             <div class="num-md">
                 @if($subscription->merchant)
-                    <a class="link" href="/admin/site-subscriptions?merchant_id={{ $subscription->merchant->id }}">{{ $subscription->merchant->name }}</a>
+                    <a class="link" href="{!! $makeSubscriptionIndexUrl(['merchant_id' => $subscription->merchant->id]) !!}">{{ $subscription->merchant->name }}</a>
                 @else
                     未关联站点
                 @endif
@@ -55,7 +71,7 @@
             <div class="num-md">
                 @php $planName = $subscription->plan_name ?: ($subscription->plan?->name ?? '未设置'); @endphp
                 @if($subscription->plan)
-                    <a class="link" href="/admin/site-subscriptions?plan_id={{ $subscription->plan->id }}">{{ $planName }}</a>
+                    <a class="link" href="{!! $makeSubscriptionIndexUrl(['plan_id' => $subscription->plan->id]) !!}">{{ $planName }}</a>
                 @else
                     {{ $planName }}
                 @endif