fix: tab reconnects in a loop after signing in without a page reload (#32341)

After signing in on a page without reloading it, the browser tab kept using its signed-out state whenever its live connection had to reconnect. Since 0.12.0 the server drops such a connection as soon as an open chat subscribes to live updates, and the tab reconnected immediately, so after a connection drop (sleep, network change, server restart) it reconnected several times per second until the page was reloaded, putting heavy load on the server. Reconnects now use the current sign-in, so the tab comes back signed in on the first attempt and stays connected.

Fixes #32338

src/routes/+layout.svelte

@@ -183,7 +183,7 @@
 			randomizationFactor: 0.5,
 			path: '/ws/socket.io',
 			transports: enableWebsocket ? ['websocket'] : ['polling', 'websocket'],
-			auth: { token: localStorage.token }
+			auth: (cb) => cb({ token: localStorage.token })
 		});
 		await socket.set(_socket);