diff --git a/inc/check_login.php b/inc/check_login.php
index 36d6428..60860bf 100755
--- a/inc/check_login.php
+++ b/inc/check_login.php
@@ -28,13 +28,36 @@ if (!isset($_SESSION['user_id']) && isset($_COOKIE['remember_token'])) {
         $update_stmt = mysqli_prepare($conn, $update_sql);
         mysqli_stmt_bind_param($update_stmt, "ss", $new_expires_at, $token);
         mysqli_stmt_execute($update_stmt);
+        mysqli_stmt_close($update_stmt);
     } else {
         // Token ist ungültig oder abgelaufen, Cookie löschen
         setcookie('remember_token', '', time() - 3600, "/");
     }
 }
 
-if (!isset($_SESSION['user_id'])) {
+// 🔹 Letzte Aktivität aktualisieren (nur für eingeloggte Benutzer)
+if (isset($_SESSION['user_id'])) {
+    $now = new DateTime();
+    $last_update = $_SESSION['last_activity_update'] ?? null;
+    $update_needed = true;
+
+    if ($last_update) {
+        $last = new DateTime($last_update);
+        if ($now->getTimestamp() - $last->getTimestamp() < 60) {
+            $update_needed = false;
+        }
+    }
+
+    if ($update_needed) {
+        $stmt = mysqli_prepare($conn, "UPDATE users SET last_activity = NOW() WHERE id = ?");
+        if ($stmt) {
+            mysqli_stmt_bind_param($stmt, "i", $_SESSION['user_id']);
+            mysqli_stmt_execute($stmt);
+            mysqli_stmt_close($stmt);
+            $_SESSION['last_activity_update'] = $now->format('Y-m-d H:i:s');
+        }
+    }
+} else {
     header('Location: login.php');
     exit();
 }