feat: Updated plans and catalogue pages

adminsite/next.config.ts

@@ -8,6 +8,14 @@ import type { NextConfig } from "next";
  */
 const nextConfig: NextConfig = {
     output: "standalone",
+    /* Plans and catalogue became one page. Both old paths are bookmarked in
+     * staff browsers, so they redirect rather than 404. */
+    async redirects() {
+        return [
+            { source: "/staff/plans", destination: "/staff/pricing", permanent: true },
+            { source: "/staff/catalogue", destination: "/staff/pricing", permanent: true },
+        ];
+    },
 };
 
 export default nextConfig;