Add registry kind indexes and entity pages.

CONTENT-WP-0002-T02 reads kinds from each snapshot and serves both example dataspaces without oncology imports.

Assistant: grok
Assistant-Session: 01a1346c-fdff-7741-b1af-b7283661554b

ui/components/PageHeader.tsx

@@ -0,0 +1,16 @@
+/**
+ * Page heading adapted from OnCo PageHeader: kicker, title, lede.
+ * Copyright (c) 2026 OnCo for the adapted pattern. MIT License. See ui/NOTICE.
+ * Garden art and domain logos are not included.
+ */
+export function PageHeader({ kicker, title, lede }: { kicker?: string; title: string; lede?: string }) {
+  return (
+    <header className="border-b border-border">
+      <div className="mx-auto max-w-7xl px-4 pt-8 pb-6 sm:px-6 sm:pt-10">
+        {kicker ? <p className="kicker mb-2">{kicker}</p> : null}
+        <h1 className="text-3xl font-semibold tracking-tight first-letter:uppercase sm:text-4xl">{title}</h1>
+        {lede ? <p className="mt-3 max-w-3xl text-[17px] leading-relaxed text-foreground/85 sm:text-lg">{lede}</p> : null}
+      </div>
+    </header>
+  );
+}