feat(admin): 密码校验统一与后台 API/设置增强

- 管理端账号/代理/站点等密码最短长度统一为 6 位
- LotterySettings、审计日志展示、币种与报表接口等小修复
- 补充设置批量更新、注单、校验错误等相关测试

app/Support/AdminSettingPolicy.php

@@ -17,6 +17,10 @@ final class AdminSettingPolicy
 
     public static function canUpdate(AdminUser $admin, string $key): bool
     {
+        if (LotterySettings::isEnvLocked($key)) {
+            return false;
+        }
+
         if (str_starts_with($key, 'settlement.')) {
             return $admin->hasAdminPermission('prd.payout.manage');
         }
@@ -46,6 +50,12 @@ final class AdminSettingPolicy
         $values = [];
         foreach ($items as $index => $item) {
             $key = (string) $item['key'];
+            if (LotterySettings::isEnvLocked($key)) {
+                throw ValidationException::withMessages([
+                    "items.$index.key" => ['该参数由服务器环境变量配置，不能在后台修改。'],
+                ]);
+            }
+
             if (! in_array($key, self::WALLET_LIMIT_KEYS, true)) {
                 continue;
             }