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

app/Http/Controllers/Api/V1/Admin/AgentSettlement/AgentSettlementBillBadDebtWriteOffController.php

@@ -2,15 +2,15 @@
 
 namespace App\Http\Controllers\Api\V1\Admin\AgentSettlement;
 
+use App\Support\ApiResponse;
+use App\Services\AuditLogger;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Support\Facades\DB;
 use App\Http\Controllers\Controller;
+use App\Support\AdminAgentSettlementScope;
 use App\Http\Middleware\RecordAdminApiAudit;
 use App\Http\Requests\Admin\AdminSettlementBillBadDebtRequest;
 use App\Services\AgentSettlement\AgentSettlementBadDebtService;
-use App\Services\AuditLogger;
-use App\Support\AdminAgentSettlementScope;
-use App\Support\ApiResponse;
-use Illuminate\Http\JsonResponse;
-use Illuminate\Support\Facades\DB;
 
 final class AgentSettlementBillBadDebtWriteOffController extends Controller
 {
@@ -31,6 +31,7 @@ final class AgentSettlementBillBadDebtWriteOffController extends Controller
             $settlement_bill,
             $request->validated('reason'),
             (int) $admin->id,
+            $request->validated('idempotency_key'),
         );
 
         $after = DB::table('settlement_bills')->where('id', $settlement_bill)->first();