test(platform-orders): guard export ledger links param order on show page

tests/Feature/AdminPlatformOrderShowExportLedgerLinksShouldStartWithDownloadParamTest.php

@@ -0,0 +1,71 @@
+<?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 AdminPlatformOrderShowExportLedgerLinksShouldStartWithDownloadParamTest 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_show_page_export_ledger_links_should_start_with_download_param_for_safety_and_stability(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+
+        $plan = Plan::query()->create([
+            'code' => 'po_show_export_ledger_link_order_01',
+            'name' => '平台订单详情导出链接顺序护栏测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_SHOW_EXPORT_LEDGER_LINK_ORDER_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [],
+        ]);
+
+        $res = $this->get('/admin/platform-orders/' . $order->id);
+        $res->assertOk();
+
+        $base = '/admin/platform-orders/' . $order->id . '/export-ledger?download=1';
+        $withSnapshot = '/admin/platform-orders/' . $order->id . '/export-ledger?download=1&include_order_snapshot=1';
+
+        $res->assertSee($base, false);
+        $res->assertSee($withSnapshot, false);
+
+        // 反向断言：不允许 include_order_snapshot 出现在 download 之前（保持 URL 口径稳定，避免回退时测试/前端混乱）
+        $res->assertDontSee('/admin/platform-orders/' . $order->id . '/export-ledger?include_order_snapshot=1&download=1', false);
+    }
+}