refactor: 重构语言协商中间件，简化语言解析逻辑并增强异常处理，更新相关配置以支持多环境开发

app/Support/LotteryMessage.php

@@ -22,7 +22,7 @@ final class LotteryMessage
     public static function sso(Request $request, int $code): string
     {
         $fallback = (string) config('lottery.locales.fallback', 'en');
-        $locale = (string) ($request->attributes->get('lottery_locale') ?? $fallback);
+        $locale = (string) ($request->attributes->get('lottery_locale') ?? LotteryLocale::resolve($request));
         $key = 'sso.'.$code; // 对应 lang/{locale}/sso.php 内键名，如 '8001'
 
         $msg = trans($key, [], $locale);