平台订单列表：补齐失败原因过长不生成keyword链接的护栏测试

tests/Feature/AdminPlatformOrderSyncFailedReasonLongDoesNotRenderKeywordLinkTest.php

@@ -0,0 +1,76 @@
+<?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 AdminPlatformOrderSyncFailedReasonLongDoesNotRenderKeywordLinkTest 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_platform_orders_page_long_sync_reason_should_not_render_keyword_link(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'sync_reason_long_guard_plan',
+            'name' => '同步失败原因过长链接护栏测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        // 需要超过页面阈值（默认 config 为 200），这里用 260 触发“原因过长”分支
+        $longReason = str_repeat('E', 260);
+
+        PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_SYNC_LONG_REASON_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'activated',
+            'payment_status' => 'paid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 10,
+            'placed_at' => now(),
+            'paid_at' => now(),
+            'activated_at' => now(),
+            'meta' => [
+                'subscription_activation_error' => [
+                    'message' => $longReason,
+                    'at' => now()->toDateTimeString(),
+                    'admin_id' => 1,
+                ],
+            ],
+        ]);
+
+        $res = $this->get('/admin/platform-orders');
+        $res->assertOk();
+
+        $res->assertSee('同步失败原因 TOP5');
+        $res->assertSee('原因过长，请复制到筛选框', false);
+        $res->assertDontSee('sync_error_keyword=' . urlencode($longReason), false);
+    }
+}