fix(settlement): 操作记录分页、流水动作与坏账幂等加固

- 新增 settlement-operations 合并列表 API，收付/调账接口改为标准分页
- actionable_only 流水在内存过滤后正确分页
- 已结账单流水不再展示补差/冲正快捷动作
- 坏账核销支持 idempotency_key 并写入 result_bill_id
- 补充操作记录、流水与坏账幂等相关测试

tests/Feature/AgentSettlementListsApiTest.php

@@ -1,9 +1,9 @@
 <?php
 
 use App\Models\AdminUser;
-use Illuminate\Foundation\Testing\RefreshDatabase;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Hash;
+use Illuminate\Foundation\Testing\RefreshDatabase;
 
 uses(RefreshDatabase::class);
 
@@ -87,12 +87,30 @@ test('settlement payments and adjustments index return items', function (): void
     $this->withHeader('Authorization', 'Bearer '.$token)
         ->getJson('/api/v1/admin/settlement-payments?admin_site_id='.$siteId)
         ->assertOk()
-        ->assertJsonPath('data.items.0.settlement_bill_id', $billId);
+        ->assertJsonPath('data.items.0.settlement_bill_id', $billId)
+        ->assertJsonPath('data.total', 1)
+        ->assertJsonPath('data.page', 1);
 
     $this->withHeader('Authorization', 'Bearer '.$token)
         ->getJson('/api/v1/admin/settlement-adjustments?admin_site_id='.$siteId)
         ->assertOk()
-        ->assertJsonPath('data.items.0.original_bill_id', $billId);
+        ->assertJsonPath('data.items.0.original_bill_id', $billId)
+        ->assertJsonPath('data.total', 1);
+
+    $operations = $this->withHeader('Authorization', 'Bearer '.$token)
+        ->getJson('/api/v1/admin/settlement-operations?admin_site_id='.$siteId.'&settlement_period_id='.$periodId)
+        ->assertOk()
+        ->assertJsonPath('data.total', 2)
+        ->json('data.items');
+
+    expect(collect($operations)->pluck('kind')->sort()->values()->all())
+        ->toBe(['adjustment', 'payment']);
+
+    $this->withHeader('Authorization', 'Bearer '.$token)
+        ->getJson('/api/v1/admin/settlement-operations?admin_site_id='.$siteId.'&settlement_period_id='.$periodId.'&operation_type=payment')
+        ->assertOk()
+        ->assertJsonPath('data.total', 1)
+        ->assertJsonPath('data.items.0.kind', 'payment');
 
     $this->withHeader('Authorization', 'Bearer '.$token)
         ->getJson('/api/v1/admin/settlement-bills?admin_site_id='.$siteId.'&bill_type=player')