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/Ticket/TicketItemsIndexController.php

@@ -2,25 +2,28 @@
 
 namespace App\Http\Controllers\Api\V1\Ticket;
 
-use App\Http\Controllers\Controller;
 use App\Models\Player;
 use App\Models\TicketItem;
 use App\Support\ApiResponse;
-use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use App\Support\PaginationTrait;
+use Illuminate\Http\JsonResponse;
+use App\Http\Controllers\Controller;
 
 /**
  * `GET /api/v1/ticket/items` — 我的注单（注项列表，支持 `draw_no` 筛选）。
  */
-class TicketItemsIndexController extends Controller
+final class TicketItemsIndexController extends Controller
 {
+    use PaginationTrait;
+
     public function __invoke(Request $request): JsonResponse
     {
         /** @var Player $player */
         $player = $request->attributes->get('lottery_player');
 
-        $perPage = max(1, min(50, (int) $request->query('per_page', 20)));
-        $page = max(1, (int) $request->query('page', 1));
+        $perPage = $this->perPage($request, 'per_page', 20, 50);
+        $page = $this->page($request);
         $drawNo = $request->query('draw_no');
 
         $query = TicketItem::query()