test(billing): guardrails for platform order create form fields

tests/Feature/AdminPlatformOrderCreateTest.php

@@ -47,6 +47,35 @@ class AdminPlatformOrderCreateTest extends TestCase
         $res->assertSee('创建订单');
     }
 
+    public function test_platform_order_create_form_should_render_core_fields(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        // 需要至少一个套餐供选择
+        Plan::query()->create([
+            'code' => 'create_order_plan_fields_01',
+            'name' => '创建订单字段渲染测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 100,
+            'list_price' => 100,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $res = $this->get('/admin/platform-orders/create');
+
+        $res->assertOk();
+
+        // Guardrails: 页面必须渲染出核心表单字段，否则运营无法下单。
+        $res->assertSee('form-grid', false);
+        $res->assertSee('name="merchant_id"', false);
+        $res->assertSee('name="plan_id"', false);
+        $res->assertSee('name="order_type"', false);
+        $res->assertSee('name="quantity"', false);
+        $res->assertSee('创建订单');
+    }
+
     public function test_platform_admin_can_open_create_platform_order_form_with_site_subscription_hint(): void
     {
         $this->loginAsPlatformAdmin();