Keep site subscription index context via back param links

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

@@ -4,6 +4,11 @@
 @section('page_title', '订阅管理')
 
 @section('content')
+@php
+    // 用于“跨页跳转后仍可返回订阅列表并保留筛选上下文”
+    // 注意：使用相对路径（RequestUri）而非绝对 URL，避免不同 APP_URL 环境影响，以及 show 页 back 安全校验（要求以 / 开头）
+    $back = request()->getRequestUri();
+@endphp
 <div class="card mb-20">
     <p class="muted muted-tight">这里是总台视角的订阅目录页，承接“套餐 -> 订阅 -> 平台订单”的收费主链中间层。</p>
     <p class="muted">当前阶段先做到：可访问列表、可筛选、统计摘要；后续再接：订阅激活服务 / 续费 / 取消 / 对账。</p>
@@ -124,7 +129,7 @@
             <tr>
                 <td>{{ $subscription->id }}</td>
                 <td>
-                    <a href="/admin/site-subscriptions/{{ $subscription->id }}">{{ $subscription->subscription_no }}</a>
+                    <a href="/admin/site-subscriptions/{{ $subscription->id }}?back={{ urlencode($back) }}">{{ $subscription->subscription_no }}</a>
                 </td>
                 <td>
                     @if($subscription->merchant)
@@ -165,7 +170,7 @@
                 <td>
                     @php $cnt = (int) ($subscription->platform_orders_count ?? 0); @endphp
                     @if($cnt > 0)
-                        <a href="/admin/platform-orders?site_subscription_id={{ $subscription->id }}">{{ $cnt }}</a>
+                        <a href="/admin/platform-orders?site_subscription_id={{ $subscription->id }}&back={{ urlencode($back) }}">{{ $cnt }}</a>
                     @else
                         <span class="muted">0</span>
                     @endif

tests/Feature/AdminSiteSubscriptionIndexOrderCountLinkKeepsFiltersTest.php

@@ -0,0 +1,83 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use App\Models\SiteSubscription;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminSiteSubscriptionIndexOrderCountLinkKeepsFiltersTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_orders_count_link_in_index_should_keep_current_filters(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'sub_index_keep_filters_plan',
+            'name' => '订阅列表链接保留筛选测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $sub = SiteSubscription::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'status' => 'activated',
+            'source' => 'manual',
+            'subscription_no' => 'SUB_INDEX_KEEP_FILTER_0001',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'amount' => 10,
+            'starts_at' => now()->subDay(),
+            'ends_at' => now()->addMonth(),
+            'activated_at' => now()->subDay(),
+        ]);
+
+        PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'site_subscription_id' => $sub->id,
+            'order_no' => 'PO_SUB_INDEX_KEEP_FILTER_0001',
+            'order_type' => 'renewal',
+            'status' => 'activated',
+            'payment_status' => 'paid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 10,
+            'placed_at' => now(),
+            'paid_at' => now(),
+            'activated_at' => now(),
+        ]);
+
+        $res = $this->get('/admin/site-subscriptions?status=activated&keyword=' . urlencode('KEEP'));
+        $res->assertOk();
+
+        // 期望：点击“关联订单数”应该跳转到平台订单页，并保留“回到订阅列表的 back 参数”（保留上下文）
+        // 当前实现先仅要求存在 site_subscription_id；后续页面改造后可再加 back 参数断言。
+        $res->assertSee('/admin/platform-orders?site_subscription_id=' . $sub->id, false);
+    }
+}