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

tests/Feature/LotterySettingsTest.php

@@ -13,6 +13,13 @@ test('lottery settings get returns seeded value', function (): void {
     expect(LotterySettings::get('fixture.flag'))->toBeTrue();
 });
 
+test('env locked draw settings ignore database overrides', function (): void {
+    config(['lottery.draw.interval_minutes' => 9]);
+    LotterySettings::put('draw.interval_minutes', 99, 'draw');
+
+    expect(LotterySettings::drawIntervalMinutes())->toBe(9);
+});
+
 test('lottery settings misses are not cached', function (): void {
     Cache::flush();