refactor：拆分 API 路由与请求校验，统一 final 类和代码风格

app/Http/Controllers/Api/V1/Admin/Jackpot/AdminJackpotPoolUpdateController.php

@@ -2,11 +2,11 @@
 
 namespace App\Http\Controllers\Api\V1\Admin\Jackpot;
 
-use App\Http\Controllers\Controller;
 use App\Models\JackpotPool;
 use App\Support\ApiResponse;
-use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use Illuminate\Http\JsonResponse;
+use App\Http\Controllers\Controller;
 
 /**
  * PUT /api/v1/admin/jackpot/pools/{pool} — 更新奖池运营参数（蓄水比例、阈值等）。