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/Draw/AdminDrawShowController.php

@@ -2,13 +2,13 @@
 
 namespace App\Http\Controllers\Api\V1\Admin\Draw;
 
+use Carbon\Carbon;
+use App\Models\Draw;
+use App\Support\ApiResponse;
+use Illuminate\Http\JsonResponse;
 use App\Http\Controllers\Controller;
 use App\Lottery\DrawResultBatchStatus;
-use App\Models\Draw;
 use App\Services\Draw\DrawHallSnapshotBuilder;
-use App\Support\ApiResponse;
-use Carbon\Carbon;
-use Illuminate\Http\JsonResponse;
 
 /**
  * GET /api/v1/admin/draws/{draw} — 当期状态明细（后台查看 DB 为准 + 大厅展示态预览）。