Pass Set-Cookie header from session on page load

If a session is refreshed when accessed through /api/auth/session during
a SSR then the Set-Cookie header was lost.  Pass this along to the
client in this case to keep the session alive.

composables/session.ts

@@ -1,9 +1,34 @@
-export const useAccountSession = () => useFetch(
-	"/api/auth/session",
-	{
-		transform: (input) => input === undefined ? false as any as null: input,
-		getCachedData(key, nuxtApp) {
-			return nuxtApp.payload.data[key];
-		},
+import { appendResponseHeader } from "h3";
+import type { H3Event } from "h3";
+
+const fetchWithCookie = async (url: string, event?: H3Event) => {
+	if (!event) {
+		return $fetch(url);
 	}
-);
+
+	const cookie = useRequestHeader("cookie");
+	const res = await $fetch.raw(url, {
+		headers: cookie ? { cookie } : undefined
+	});
+	for (const cookie of res.headers.getSetCookie()) {
+		appendResponseHeader(event, "set-cookie", cookie);
+	}
+	return res._data;
+}
+
+export const useAccountSession = () => {
+	const event = useRequestEvent();
+	return useAsyncData(
+		"session",
+		async () => await fetchWithCookie("/api/auth/session", event),
+		{
+			transform: (input) => input === undefined ? false as any as null: input,
+			getCachedData(key, nuxtApp, context) {
+				if (context.cause === "refresh:manual")
+					return undefined
+				return nuxtApp.payload.data[key];
+			},
+			dedupe: "defer",
+		}
+	);
+}