feat: Implement secure authentication module and integrate session management across multiple files

index.php

@@ -4,6 +4,9 @@
  * Hoofdpagina voor status, runtime verificatie en Git webhook deployment tests.
  */
 
+require_once __DIR__ . '/auth.php';
+require_auth();
+
 // Snelle API responder voor AJAX pings
 if (isset($_GET['api']) && $_GET['api'] === 'status') {
     header('Content-Type: application/json; charset=utf-8');
@@ -23,9 +26,10 @@ date_default_timezone_set('Europe/Amsterdam');
 $serverTime = date('d-m-Y H:i:s');
 $phpVersion = PHP_VERSION;
 $serverSoftware = $_SERVER['SERVER_SOFTWARE'] ?? 'Apache / Nginx';
-$host = $_SERVER['HTTP_HOST'] ?? 'www.webenpcstudio.nl';
+$host = $_SERVER['HTTP_HOST'] ?? 'server.webenpcstudio.nl';
 $clientIp = $_SERVER['REMOTE_ADDR'] ?? 'Onbekend';
 $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'HTTPS' : 'HTTP';
+$loggedUser = $_SESSION['wpc_user_email'] ?? 'niek.rabelink@gmail.com';
 
 // Git repository inspectie (met veilige fallback)
 $activeBranch = 'dev';
@@ -91,9 +95,10 @@ if (empty($commits)) {
             </div>
             <div class="nav-status">
                 <button class="btn btn-secondary btn-sm theme-btn" onclick="toggleTheme()">🌙 Thema</button>
+                <a href="logout.php" class="btn btn-secondary btn-sm" style="color: #f87171;" title="Veilig uitloggen">🚪 Uitloggen</a>
                 <span class="nav-badge">
                     <span class="pulse-dot"></span>
-                    Git Live
+                    server.webenpcstudio.nl
                 </span>
             </div>
         </nav>
@@ -102,7 +107,7 @@ if (empty($commits)) {
         <header class="hero">
             <h1>Systeem Dashboard &amp; Git Status</h1>
             <p>
-                Realtime omgevingsstatus, Git webhook deploy-verificatie en server-runtime monitoring voor www.webenpcstudio.nl.
+                Realtime omgevingsstatus, Git webhook deploy-verificatie en server-runtime monitoring voor <strong>server.webenpcstudio.nl</strong>.
             </p>
         </header>