标记支付并生效：续费单必须绑定订阅（安全阀）并新增测试

tests/Feature/AdminPlatformOrderMarkPaidAndActivateRenewalShouldRequireSubscriptionGuardTest.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderMarkPaidAndActivateRenewalShouldRequireSubscriptionGuardTest 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_mark_paid_and_activate_should_be_blocked_when_order_is_renewal_but_subscription_missing(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'mark_paid_renewal_requires_sub_guard_plan',
+            'name' => '标记支付续费必须绑订阅安全阀测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 30,
+            'list_price' => 30,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        // 人为构造“脏数据”：renewal 但 site_subscription_id 为空
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_MARK_PAID_RENEWAL_NO_SUB_0001',
+            'order_type' => 'renewal',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 30,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [],
+        ]);
+
+        $res = $this->post('/admin/platform-orders/' . $order->id . '/mark-paid-and-activate');
+        $res->assertRedirect();
+        $res->assertSessionHas('warning');
+
+        $order->refresh();
+        $this->assertSame('unpaid', $order->payment_status);
+        $this->assertSame('pending', $order->status);
+        $this->assertNull($order->site_subscription_id);
+    }
+}