feat(app): implement Product Scan review flow, dynamic batch expiry picker, custom PDFs, PO relationships, and aligned card layouts

backend/Dockerfile

@@ -73,6 +73,7 @@ CMD ["python", "app.py"]
 FROM node:20-slim AS pfm-web-app
 WORKDIR /app
 COPY pfm-web-app/package.json pfm-web-app/package-lock.json ./
+ENV PUPPETEER_SKIP_DOWNLOAD=true
 RUN npm ci
 COPY pfm-web-app/ ./
 ENV NODE_ENV=production