增强：实现真正的创始人（ID=1）特权控制：限制非 ID=1 管理员访问部分后台模块及修改他人等级的能力

app/Http/Middleware/SiteOwnerRequired.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Symfony\Component\HttpFoundation\Response;
+
+class SiteOwnerRequired
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        if (Auth::id() !== 1) {
+            if ($request->expectsJson()) {
+                return response()->json(['message' => '特权不足，仅限站长操作', 'status' => 'error'], 403);
+            }
+            abort(403, '特权不足，此功能仅限创始人/站长操作。');
+        }
+
+        return $next($request);
+    }
+}