prepare("INSERT INTO messages (user_id, sender, message) VALUES (?, 'user', ?)");
$stmt->execute([$user_id, $msg]);
echo json_encode(['success' => true]);
}
exit;
}
// Fetch messages for initial load
$stmt = $db->prepare("SELECT * FROM messages WHERE user_id = ? ORDER BY created_at ASC");
$stmt->execute([$user_id]);
$messages = $stmt->fetchAll();
?>