feat(site): landing page with dual-pane explorer hero

site/src/components/ProtocolStrip.astro

@@ -0,0 +1,15 @@
+---
+import { useTranslations, type Locale } from "../i18n/ui";
+interface Props { locale: Locale; }
+const { locale } = Astro.props;
+const t = useTranslations(locale);
+const protocols = ["SCP", "SFTP", "FTP/S", "S3", "Kube", "SMB", "WebDAV"];
+---
+<section class="mx-auto max-w-5xl px-4 py-12 text-center">
+  <h2 class="text-overlay text-sm uppercase tracking-widest">{t("protocols.heading")}</h2>
+  <div class="mt-4 flex flex-wrap justify-center gap-2">
+    {protocols.map((proto) => (
+      <span class="rounded-full border border-line px-4 py-1 text-sm text-text">{proto}</span>
+    ))}
+  </div>
+</section>