Digital downloads store

Build a store for selling digital products (templates, ebooks, presets).

Core features:
1. Product page with preview, description, price
2. Stripe checkout, then secure signed download URL
3. Customer library to re-download purchases
4. Creator dashboard: upload files, set price, view revenue

Data: products, files, purchases, customers.
Must-haves: signed storage URLs that expire, VAT-inclusive pricing, receipts by email.