feat(frontend): added returnTo to login and signin page

frontend/src/pages/root/root.ts

@@ -1,14 +1,19 @@
 import { addRoute, setTitle, type RouteHandlerParams } from "@app/routing";
 import page from './root.html?raw'
+import { updateUser } from "@app/auth";
 
-addRoute('/', (_: string) => {
-	setTitle('ft boules')
+addRoute('/', async (_: string): Promise<string> => {
+	let user = await updateUser();
+	if (user === null)
+		setTitle(`Welcome`)
+	else
+		setTitle(`Welcome ${user.guest ? '[GUEST] ' : ''}${user.name}`);
 	return page;
-})
+}, { bypass_auth: true })
 
 
 addRoute('/with_title/:title', (_: string, args: RouteHandlerParams) => {
 	setTitle(args.title)
 	console.log(`title should be '${args.title}'`);
 	return page;
-})
+}, { bypass_auth: false })