feat: admin middleware and route cleanup

app/Http/Kernel.php

@@ -54,6 +54,7 @@ class Kernel extends HttpKernel
      */
     protected $middlewareAliases = [
         'auth' => \App\Http\Middleware\Authenticate::class,
+        'auth.admin' => \App\Http\Middleware\AuthenticateAdmin::class,
         'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
         'auth.session' => \Illuminate\Session\Middleware\AuthenticateSession::class,
         'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,

app/Http/Middleware/AuthenticateAdmin.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Illuminate\Auth\Middleware\Authenticate as Middleware;
+use Illuminate\Http\Request;
+
+class AuthenticateAdmin extends Middleware
+{
+    protected function redirectTo(Request $request): ?string
+    {
+        return auth()->user()->is_admin;
+    }
+}