v12 (#5712)

Co-authored-by: MeiMei <30769358+mei23@users.noreply.github.com>
Co-authored-by: Satsuki Yanagi <17376330+u1-liquid@users.noreply.github.com>

src/client/scripts/please-login.ts

@@ -0,0 +1,10 @@
+export default ($root: any) => {
+	if ($root.$store.getters.isSignedIn) return;
+
+	$root.dialog({
+		title: $root.$t('@.signin-required'),
+		text: null
+	});
+
+	throw new Error('signin required');
+};