first commit

Xboard/app/Http/Middleware/CheckForMaintenanceMode.php

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+<?php
+
+namespace App\Http\Middleware;
+
+use Illuminate\Foundation\Http\Middleware\PreventRequestsDuringMaintenance;
+
+class CheckForMaintenanceMode extends PreventRequestsDuringMaintenance
+{
+    /**
+     * 维护模式白名单URI
+     * @var array<int, string>
+     */
+    protected $except = [
+        // 示例：
+        // '/api/health-check',
+        // '/status'
+    ];
+}