test: prove TechLog UI migration parity

scripts/lib/vite-route-chunks.ts

@@ -0,0 +1,20 @@
+export type ViteManifestRouteEntry = Readonly<{
+  file: string;
+  name?: string;
+  isDynamicEntry?: boolean;
+  dynamicImports?: readonly string[];
+}>;
+
+export function findViteDynamicRouteChunk(
+  manifest: Readonly<Record<string, ViteManifestRouteEntry>>,
+  moduleId: string,
+): ViteManifestRouteEntry | undefined {
+  const dynamicallyImportedKeys = new Set(
+    Object.values(manifest).flatMap((entry) => entry.dynamicImports ?? []),
+  );
+  return Object.entries(manifest).find(
+    ([key, entry]) =>
+      entry.name === moduleId &&
+      (entry.isDynamicEntry === true || dynamicallyImportedKeys.has(key)),
+  )?.[1];
+}