i dont know

app/Controllers/AdminBaseController.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Controllers;
+
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Slim\Views\Twig;
+
+class AdminBaseController
+{
+    protected Twig $view;
+    protected \PDO $pdo;
+
+    public function __construct(\PDO $pdo, Twig $view)
+    {
+        $this->pdo = $pdo;
+        $this->view = $view;
+    }
+
+    /**
+     * Render a template
+     */
+    protected function render(Response $response, string $template, array $data = []): Response
+    {
+        // Add common admin data
+        $data['auth'] = [
+            'check' => isset($_SESSION['user_id']),
+            'user' => [
+                'username' => $_SESSION['username'] ?? 'Admin',
+                'is_admin' => $_SESSION['is_admin'] ?? false
+            ]
+        ];
+        
+        // Add current route for active menu highlighting
+        $route = $this->getCurrentRoute();
+        if ($route) {
+            $data['current_route'] = $route;
+        }
+
+        return $this->view->render($response, $template, $data);
+    }
+
+    /**
+     * Get current route name
+     */
+    protected function getCurrentRoute(): ?string
+    {
+        $route = $_SERVER['REQUEST_URI'] ?? '/';
+        $basePath = '/admin/';
+        
+        if (strpos($route, $basePath) === 0) {
+            $route = substr($route, strlen($basePath));
+            $parts = explode('/', $route);
+            return $parts[0] ?: 'index';
+        }
+        
+        return null;
+    }
+
+    /**
+     * Return JSON response
+     */
+    protected function json(Response $response, $data, int $status = 200): Response
+    {
+        $response->getBody()->write(json_encode($data));
+        return $response
+            ->withHeader('Content-Type', 'application/json')
+            ->withStatus($status);
+    }
+}