feat(admin): platform orders list link to subscription show

tests/Feature/AdminPlatformOrderTest.php

@@ -174,6 +174,46 @@ class AdminPlatformOrderTest extends TestCase
             ->assertSee('模拟失败')
             ->assertSee('余额不足');
 
+        // 订阅号列应可点击进入订阅详情（提升治理联动效率）
+        $sub = \App\Models\SiteSubscription::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'status' => 'activated',
+            'source' => 'manual',
+            'subscription_no' => 'SUB_LINK_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_LINK_0001',
+            'order_type' => 'renewal',
+            'status' => 'activated',
+            'payment_status' => 'paid',
+            'plan_name' => '专业版（月付）',
+            'billing_cycle' => 'monthly',
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 199,
+            'paid_amount' => 199,
+            'placed_at' => now()->subMinutes(2),
+            'paid_at' => now()->subMinutes(1),
+            'activated_at' => now(),
+        ]);
+
+        $this->get('/admin/platform-orders?keyword=PO_SUB_LINK_0001')
+            ->assertOk()
+            ->assertSee('SUB_LINK_0001')
+            ->assertSee('/admin/site-subscriptions/' . $sub->id);
+
         // 只看已同步：构造一条带有 subscription_activation 的订单 + 批量同步审计（用于列表展示）
         PlatformOrder::query()->where('order_no', 'PO202603100101')->update([
             'meta' => [