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

app/Services/Wallet/HttpMainSiteWalletGateway.php

@@ -3,8 +3,8 @@
 namespace App\Services\Wallet;
 
 use App\Models\Player;
-use GuzzleHttp\Exception\ConnectException;
 use Illuminate\Support\Facades\Http;
+use GuzzleHttp\Exception\ConnectException;
 
 /**
  * 通过 HTTP 调用主站钱包 API（路径见 config lottery.main_site.wallet_*_path）。

app/Services/Wallet/LotteryTransferService.php

@@ -2,17 +2,17 @@
 
 namespace App\Services\Wallet;
 
-use App\Exceptions\WalletOperationException;
-use App\Lottery\ErrorCode;
-use App\Models\Currency;
 use App\Models\Player;
+use App\Models\Currency;
+use App\Models\WalletTxn;
+use App\Lottery\ErrorCode;
+use Illuminate\Support\Str;
 use App\Models\PlayerWallet;
 use App\Models\TransferOrder;
-use App\Models\WalletTxn;
 use App\Services\LotterySettings;
-use Illuminate\Database\QueryException;
 use Illuminate\Support\Facades\DB;
-use Illuminate\Support\Str;
+use Illuminate\Database\QueryException;
+use App\Exceptions\WalletOperationException;
 
 /**
  * 主站 ↔ 彩票钱包：转入 / 转出（幂等键 + 流水 + 订单）。