App reorganization

app/(app)/create/[screenId]/page.tsx

@@ -0,0 +1,25 @@
+import { notFound } from "next/navigation";
+import { CreateFlowScreenView } from "../screens/CreateFlowScreenView";
+import { isValidStep } from "../utils/flowSteps";
+import type { CreateFlowStep } from "../types";
+
+/**
+ * Single dynamic route for the whole create wizard (every step in `FLOW_STEP_ORDER`).
+ *
+ * Only **canonical** `screenId` values from `CreateFlowStep` are valid. Old placeholder
+ * segments from pre-product shells are not redirected — unknown slugs `notFound()`.
+ */
+
+interface PageProps {
+  params: Promise<{ screenId: string }>;
+}
+
+export default async function CreateFlowScreenPage({ params }: PageProps) {
+  const { screenId: raw } = await params;
+
+  if (!isValidStep(raw)) {
+    notFound();
+  }
+
+  return <CreateFlowScreenView screenId={raw as CreateFlowStep} />;
+}