平台订单：补齐 BMPA 单订单清理入口（路由+控制器+详情页按钮+测试）

tests/Feature/AdminPlatformOrderShowHasClearBmpaErrorButtonTest.php

@@ -0,0 +1,69 @@
+<?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 AdminPlatformOrderShowHasClearBmpaErrorButtonTest 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_renders_clear_bmpa_error_button_when_error_exists(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'show_clear_bmpa_error_btn_test',
+            'name' => '详情页清理 BMPA 失败标记按钮测试',
+            'billing_cycle' => 'monthly',
+            'price' => 9,
+            'list_price' => 9,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_SHOW_CLEAR_BMPA_ERR_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' => 9,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [
+                'batch_mark_paid_and_activate_error' => [
+                    'message' => '历史 BMPA 失败',
+                    'at' => now()->subMinutes(2)->toDateTimeString(),
+                    'admin_id' => 1,
+                ],
+            ],
+        ]);
+
+        $this->get('/admin/platform-orders/' . $order->id)
+            ->assertOk()
+            ->assertSee('/admin/platform-orders/' . $order->id . '/clear-bmpa-error', false)
+            ->assertSee('清除 BMPA 失败标记');
+    }
+}