第 1 步：运行环境与目录权限自检
OpenEDU 采用经典 LAMP 架构，生产环境无需安装 Node.js 或 Redis；数据库仅支持 MySQL 8.0+ / MariaDB 10.6+（默认）或 PostgreSQL 15+。
| 检查项 | 当前状态 | 结果 |
|---|---|---|
| PHP Runtime (>= 8.2) | PHP 8.2.35 (apache2handler) | PASS |
| PHP Extension: ext-pdo | Loaded | PASS |
| PHP Extension: ext-openssl | Loaded | PASS |
| PHP Extension: ext-mbstring | Loaded | PASS |
| PHP Extension: ext-json | Loaded | PASS |
| Database PDO Drivers (MySQL/MariaDB or PostgreSQL) | Available: mysql | PASS |
| Writable Directory: storage/app/public | Writable | PASS |
| Writable Directory: storage/framework/cache | Writable | PASS |
| Writable Directory: storage/framework/sessions | Writable | PASS |
| Writable Directory: storage/logs | Writable | PASS |
| Writable Directory: plugins | Writable | PASS |
| Internal Storage Timezone (UTC) | date_default_timezone_get() = UTC | PASS |