Build an Invoice Generator (like Stripe Invoicing)

Build a full invoicing app from scratch that lets freelancers create invoices, add line items with tax calculations, generate professional PDFs, accept payments via Stripe, set up recurring billing, and send invoices by email. You'll implement multi-currency support, automatic tax computation, PDF rendering with @react-pdf/renderer, Stripe payment links and webhook handling, cron-based recurring invoice generation, and an analytics dashboard tracking revenue and outstanding balances.