feat(admin): order show link to subscription show

tests/Feature/AdminPlatformOrderShowTest.php

@@ -74,6 +74,25 @@ class AdminPlatformOrderShowTest extends TestCase
             ],
         ]);
 
+        // 关联一个订阅，确保详情页出现“打开订阅详情”入口
+        $sub = \App\Models\SiteSubscription::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'status' => 'activated',
+            'source' => 'manual',
+            'subscription_no' => 'SUB_SHOW_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(),
+        ]);
+
+        $order->site_subscription_id = $sub->id;
+        $order->save();
+
         $this->get('/admin/platform-orders/' . $order->id)
             ->assertOk()
             ->assertSee('平台订单详情')
@@ -81,6 +100,8 @@ class AdminPlatformOrderShowTest extends TestCase
             ->assertSee('标记支付并生效')
             ->assertSee('同步订阅')
             ->assertSee('订阅同步元数据')
+            ->assertSee('关联订阅')
+            ->assertSee('打开订阅详情')
             ->assertSee('审计记录')
             ->assertSee('清除同步失败标记');
     }