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/get-instance-name.ts

@@ -0,0 +1,8 @@
+export function getInstanceName() {
+	const siteName = document.querySelector('meta[property="og:site_name"]') as HTMLMetaElement;
+	if (siteName && siteName.content) {
+		return siteName.content;
+	}
+
+	return 'Misskey';
+}