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/Draw/DrawResultShowController.php

@@ -2,18 +2,18 @@
 
 namespace App\Http\Controllers\Api\V1\Draw;
 
-use App\Http\Controllers\Controller;
-use App\Lottery\ErrorCode;
 use App\Models\Draw;
-use App\Services\Draw\DrawResultViewService;
+use App\Lottery\ErrorCode;
 use App\Support\ApiResponse;
-use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use Illuminate\Http\JsonResponse;
+use App\Http\Controllers\Controller;
+use App\Services\Draw\DrawResultViewService;
 
 /**
  * `GET /api/v1/draw/results/{draw_no}` — 单期详情（便于玩家端[< >]切换）。
  */
-class DrawResultShowController extends Controller
+final class DrawResultShowController extends Controller
 {
     public function __construct(
         private readonly DrawResultViewService $viewer,