feat(events): stream Redis invalidations over SSE

app/admin/[character]/[page]/page.tsx

@@ -2,6 +2,7 @@ import { notFound, redirect } from "next/navigation";
 import { connection } from "next/server";
 
 import { EditorWorkspace } from "@/components/admin/editor-workspace";
+import { LiveRefresh } from "@/components/live-refresh";
 import { getAdminSession } from "@/lib/auth/server";
 import { loadAdminNavigation, loadAdminPage } from "@/lib/content/loaders";
 
@@ -18,5 +19,16 @@ export default async function AdminEditorPage({
     loadAdminNavigation(),
   ]);
   if (!snapshot) notFound();
-  return <EditorWorkspace snapshot={snapshot} navigation={navigation} />;
+  return (
+    <>
+      {process.env.BUZZ_DEMO_MODE === "true" ? null : (
+        <LiveRefresh endpoint="/api/events/admin" />
+      )}
+      <EditorWorkspace
+        key={`${snapshot.page.id}:${snapshot.page.version}`}
+        snapshot={snapshot}
+        navigation={navigation}
+      />
+    </>
+  );
 }