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/Jackpot/JackpotSummaryController.php

@@ -2,16 +2,16 @@
 
 namespace App\Http\Controllers\Api\V1\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;
 
 /**
  * `GET /api/v1/jackpot/summary` — 当前奖池水位（公开；玩家端开奖区展示）。
  */
-class JackpotSummaryController extends Controller
+final class JackpotSummaryController extends Controller
 {
     public function __invoke(Request $request): JsonResponse
     {