refactor(usermanagement): gunakan middleware untuk autentikasi dan inisialisasi user di semua controller

- Mengubah properti `user` dari `public` menjadi `protected` di semua controller terkait:
  - **PermissionsController**
  - **PositionsController**
  - **RolesController**
  - **UsersController**

- Menghapus inisialisasi manual user dengan `Auth::guard('web')->user()` dari konstruktor.

- Menambahkan middleware:
  - `auth` untuk memastikan bahwa hanya pengguna yang telah login dapat mengakses controller.
  - Middleware tambahan anonim untuk mengassign properti `user` setelah middleware `auth` dijalankan.

app/Http/Controllers/PermissionsController.php

@@ -23,7 +23,7 @@
         /**
          * @var \Illuminate\Contracts\Auth\Authenticatable|null
          */
-        public $user;
+        protected $user;
 
         /**
          * UsersController constructor.
@@ -32,7 +32,14 @@
          */
         public function __construct()
         {
-            $this->user = Auth::guard('web')->user();
+            // Mengatur middleware auth
+            $this->middleware('auth');
+
+            // Mengatur user setelah middleware auth dijalankan
+            $this->middleware(function ($request, $next) {
+                $this->user = Auth::user();
+                return $next($request);
+            });
         }
 
         /**

app/Http/Controllers/PositionsController.php

@@ -23,7 +23,7 @@
         /**
          * @var \Illuminate\Contracts\Auth\Authenticatable|null
          */
-        public $this->user;
+        protected $user;
 
         /**
          * UsersController constructor.
@@ -32,7 +32,14 @@
          */
         public function __construct()
         {
-            $this->user = Auth::guard('web')->user();
+            // Mengatur middleware auth
+            $this->middleware('auth');
+
+            // Mengatur user setelah middleware auth dijalankan
+            $this->middleware(function ($request, $next) {
+                $this->user = Auth::user();
+                return $next($request);
+            });
         }
 
         /**

app/Http/Controllers/RolesController.php

@@ -26,7 +26,7 @@
         /**
          * @var \Illuminate\Contracts\Auth\Authenticatable|null
          */
-        public $user;
+        protected $user;
 
         /**
          * UsersController constructor.
@@ -35,7 +35,14 @@
          */
         public function __construct()
         {
-            $this->user = Auth::guard('web')->user();
+            // Mengatur middleware auth
+            $this->middleware('auth');
+
+            // Mengatur user setelah middleware auth dijalankan
+            $this->middleware(function ($request, $next) {
+                $this->user = Auth::user();
+                return $next($request);
+            });
         }
 
         /**

app/Http/Controllers/UsersController.php

@@ -28,7 +28,7 @@
          /**
          * @var \Illuminate\Contracts\Auth\Authenticatable|null
          */
-        public $user;
+        protected $user;
 
         /**
          * UsersController constructor.
@@ -37,7 +37,14 @@
          */
         public function __construct()
         {
-            $this->user = Auth::guard('web')->user();
+            // Mengatur middleware auth
+            $this->middleware('auth');
+
+            // Mengatur user setelah middleware auth dijalankan
+            $this->middleware(function ($request, $next) {
+                $this->user = Auth::user();
+                return $next($request);
+            });
         }
 
         /**