平台订单创建页：去订阅管理选择订阅的 back 保持 require_subscription=1 并新增测试

tests/Feature/AdminPlatformOrderCreateRequireSubscriptionFlagJumpBackShouldIncludeRequireSubscriptionTest.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderCreateRequireSubscriptionFlagJumpBackShouldIncludeRequireSubscriptionTest 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_jump_to_subscriptions_link_should_carry_back_with_require_subscription_flag_when_no_query(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        // 模拟“校验失败回填后”回到 create 页：URL 不带 require_subscription query，但 old input 仍有 require_subscription=1
+        // 通过 withSession 注入 old input
+        $res = $this->withSession([
+            '_old_input' => [
+                'require_subscription' => '1',
+            ],
+        ])->get('/admin/platform-orders/create');
+
+        $res->assertOk();
+
+        // 关键：跳转订阅管理的链接应带 back，且 back 中应包含 require_subscription=1
+        // 这样用户从订阅管理选中订阅再回来，治理口径不会丢。
+        $res->assertSee('去订阅管理选择订阅', false);
+        $res->assertSee('back=%2Fadmin%2Fplatform-orders%2Fcreate%3Frequire_subscription%3D1', false);
+    }
+}