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/Http/Middleware/NegotiateLotteryLocale.php

@@ -2,6 +2,7 @@
 
 namespace App\Http\Middleware;
 
+use App\Support\LotteryLocale;
 use Closure;
 use Illuminate\Http\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -16,62 +17,18 @@ use Symfony\Component\HttpFoundation\Response;
  * 【协商顺序】① 请求头 X-Locale（必须为 config 支持的 zh/en/ne 之一）；② Accept-Language 首选项；③ fallback。
  *
  * 【与前端】浏览器或 App 可直接带 X-Locale，或仅靠 Accept-Language；无需前端维护文案 JSON。
+ *
+ * 【与异常 JSON】{@see LotteryLocale} 与 middleware 同源，在未命中路由、`lottery_locale` 未写入时仍可从 Header 推导。
  */
 class NegotiateLotteryLocale
 {
     public function handle(Request $request, Closure $next): Response
     {
-        $locale = $this->resolveLocale($request);
+        $locale = LotteryLocale::resolve($request);
         // attribute 名称固定为 lottery_locale，与 Request::lotteryLocale() 宏一致
         $request->attributes->set('lottery_locale', $locale);
         app()->setLocale($locale);
 
         return $next($request);
     }
-
-    /** 综合 X-Locale 与 Accept-Language，得到最终语言代码 */
-    private function resolveLocale(Request $request): string
-    {
-        /** @var list<string> $supported */
-        $supported = array_values(array_unique(config('lottery.locales.supported', ['en', 'zh', 'ne'])));
-        $fallback = (string) config('lottery.locales.fallback', 'en');
-
-        $header = strtolower(trim((string) $request->header('X-Locale', '')));
-        if ($header !== '' && in_array($header, $supported, true)) {
-            return $header;
-        }
-
-        return $this->fromAcceptLanguage((string) $request->header('Accept-Language', ''), $supported, $fallback);
-    }
-
-    /**
-     * 解析标准 Accept-Language（可带权重 q=），只认主语言段 zh / en / ne。
-     *
-     * @param  list<string>  $supported  config('lottery.locales.supported')
-     */
-    private function fromAcceptLanguage(string $header, array $supported, string $fallback): string
-    {
-        if ($header === '') {
-            return $fallback;
-        }
-
-        foreach (explode(',', $header) as $part) {
-            $code = strtolower(trim(explode(';', trim($part), 2)[0] ?? ''));
-            if ($code === '') {
-                continue;
-            }
-            $primary = explode('-', $code, 2)[0] ?? $code;
-            if ($primary === 'zh' && in_array('zh', $supported, true)) {
-                return 'zh';
-            }
-            if ($primary === 'ne' && in_array('ne', $supported, true)) {
-                return 'ne';
-            }
-            if ($primary === 'en' && in_array('en', $supported, true)) {
-                return 'en';
-            }
-        }
-
-        return $fallback;
-    }
 }