- Translate index.html to English as default language
- Copy PT-BR version to index.pt-br.html
- Add hreflang tags for SEO in both versions
- Add language selector in navbar (EN ↔ PT-BR)
- Add nginx.conf with Content-Language headers and /pt-br routing
- Update Dockerfile to process and serve both HTML files
- Remove "Open Source Core" claims (no public repo exists)
- Replace Unsplash stock image with CSS mockup dashboard
- Fix CTA buttons to link to signup ({{APP_URL}}/signup)
- Remove dead links: demo buttons, footer sections (Resources, Company, Legal), social links without URLs, newsletter form, docs link
- Translate all English terms to PT-BR (~40+ translations)
- Fix Portuguese accentuation (Começar, incluído, usuário, etc.)
