Add asset sync script

scripts/sync-assets.mjs

@@ -0,0 +1,27 @@
+import { cp, mkdir, rm, stat } from 'node:fs/promises';
+import path from 'node:path';
+
+async function syncAssets() {
+  const root = process.cwd();
+  const sourceDir = path.join(root, 'content', 'assets');
+  const targetDir = path.join(root, 'public', 'assets');
+
+  await rm(targetDir, { recursive: true, force: true });
+  await mkdir(targetDir, { recursive: true });
+
+  try {
+    await stat(sourceDir);
+  } catch {
+    // Nothing to copy yet; leave the empty directory in place.
+    console.info('sync-assets: no content/assets directory found yet.');
+    return;
+  }
+
+  await cp(sourceDir, targetDir, { recursive: true, force: true });
+  console.info('sync-assets: copied content/assets → public/assets.');
+}
+
+syncAssets().catch((error) => {
+  console.error('sync-assets: failed to mirror assets.', error);
+  process.exit(1);
+});