Dual Currency Engine (INR & USD)
Global e-commerce requires localized pricing. Users accessing the site from India are served localized INR (`₹`) pricing optimized for UPI and NetBanking, while international visitors see USD (`$`) with card and PayPal gateways.
The `CurrencyProvider` context automatically detects user locale from Cloudflare `CF-IPCountry` headers while persisting manual user overrides.