feat(admin): 添加分红积分基准价格设置并进行有效性验证

- 在系统配置中添加"award_integral_price"字段，用于设置分红积分基准价格
- 添加对分红积分基准价格的验证，确保其值大于 0
- 优化了代码格式，调整了数组元素的缩进

app/common/repositories/user/AwardIntegralPriceRepository.php

@@ -41,7 +41,7 @@ class AwardIntegralPriceRepository extends BaseRepository
         if (!$day) {
             $day = date('Y-m-d');
         }
-        if ($info = $this->dao->search(['day' => date('Y-m-d')])->find()) {
+        if ($info = $this->dao->search(['day' => $day])->find()) {
             return $info->toArray();
         }
         @file_put_contents('yesterday.txt', AwardIntegralPrice::getLastSql() . PHP_EOL, FILE_APPEND);