lots of fixes. cant remember them all

app/(builder)/parts/[partRole]/page.tsx

@@ -0,0 +1,14 @@
+import { redirect } from "next/navigation";
+
+export default async function PartsRoleRedirectPage({
+  params,
+  searchParams,
+}: {
+  params: { partRole: string };
+  searchParams?: { platform?: string };
+}) {
+  const partRole = params.partRole;
+  const platform = searchParams?.platform ?? "AR-15";
+
+  redirect(`/parts/p/${encodeURIComponent(platform)}/${encodeURIComponent(partRole)}`);
+}