feat(admin): 续费订单支持手工绑定订阅（attach-subscription）+ 时区改为 Asia/Shanghai

tests/Feature/AdminPlatformOrderAttachSubscriptionShouldGuardTest.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\PlatformOrder;
+use App\Models\SiteSubscription;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderAttachSubscriptionShouldGuardTest 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_attach_subscription_should_guard_non_renewal_orders(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => 1,
+            'plan_id' => 1,
+            'order_no' => 'PO_TEST_ATTACH_1',
+            'order_type' => 'new_purchase',
+            'status' => 'placed',
+            'payment_status' => 'unpaid',
+            'payment_channel' => '',
+            'plan_name' => 'Test',
+            'billing_cycle' => 'monthly',
+            'period_months' => 1,
+            'quantity' => 1,
+            'list_amount' => 0,
+            'discount_amount' => 0,
+            'payable_amount' => 0,
+            'paid_amount' => 0,
+            'meta' => [],
+        ]);
+
+        $sub = SiteSubscription::query()->firstOrFail();
+
+        $res = $this->post("/admin/platform-orders/{$order->id}/attach-subscription", [
+            'site_subscription_id' => $sub->id,
+        ]);
+
+        $res->assertRedirect();
+
+        $order->refresh();
+        $this->assertTrue((int) ($order->site_subscription_id ?? 0) === 0);
+    }
+}