<?php
require_once '../includes/db.php';
require_once '../includes/auth.php';

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isLoggedIn()) {
    $theme = $_POST['theme'] === 'light' ? 'light' : 'dark';
    $stmt = $pdo->prepare("UPDATE users SET theme_preference = ? WHERE id = ?");
    $stmt->execute([$theme, $_SESSION['user_id']]);
    echo json_encode(['success' => true]);
}
?>