Make session cookie permament

Set a max age for the session cookie to prevent it from expiring when
the browser is closed.  To prevent the age limit from being being
reached the session cookie is refreshed every time the session is
loaded.  This should fix login being lost when the browser is stopped.

server/api/auth/session.get.ts

@@ -11,6 +11,8 @@ export default defineEventHandler(async (event): Promise<AccountSession | undefi
 		subscriptions.find(sub => sub.type === "push" && sub.sessionId === session.id)
 	);
 
+	await refreshAccountSession(event, session);
+
 	return {
 		id: session.id,
 		account: accounts.find(account => account.id === session.accountId)!,