feat(F-052): completed feature

project/apps/admin/src/app/api/upload/route.ts

@@ -1,8 +1,28 @@
 import { randomUUID } from 'node:crypto';
-import { mkdir, writeFile } from 'node:fs/promises';
+import { copyFile, mkdir, writeFile } from 'node:fs/promises';
 import path from 'node:path';
 import { NextRequest, NextResponse } from 'next/server';
 
+/**
+ * Peer upload directories (frontend and storefront) that must mirror the
+ * admin's own `public/uploads/`. After every successful upload, the file
+ * is copied to each peer so that product pages render images regardless
+ * of which app the URL is fetched from.
+ */
+const PEER_UPLOAD_DIRS = [
+  path.join(process.cwd(), '..', '..', 'frontend', 'public', 'uploads'),
+  path.join(process.cwd(), '..', '..', 'storefront', 'public', 'uploads'),
+];
+
+async function mirrorToPeers(filePath: string): Promise<void> {
+  await Promise.allSettled(
+    PEER_UPLOAD_DIRS.map(async (dir) => {
+      await mkdir(dir, { recursive: true });
+      await copyFile(filePath, path.join(dir, path.basename(filePath)));
+    }),
+  );
+}
+
 const API = process.env.NEXT_PUBLIC_API_URL ?? 'http://127.0.0.1:3000';
 const MAX_SIZE = 10 * 1024 * 1024;
 const EXTENSION_BY_TYPE: Readonly<Record<string, string>> = {
@@ -49,6 +69,7 @@ export async function POST(request: NextRequest) {
 
     await mkdir(uploadDir, { recursive: true });
     await writeFile(filePath, buffer, { flag: 'wx' });
+    await mirrorToPeers(filePath);
 
     return NextResponse.json({
       url: `/uploads/${filename}`,