## Simple Mode Enhancements
- Add `simple-index.html` as dedicated homepage for Simple Mode
- Hide marketing sections (FAQ, How It Works, Related Tools) on tool pages
- Add simplified navbar and footer for tool pages in Simple Mode
- Configure vite preview server to handle language-prefixed URLs
## Language Routing
- Add middleware to rewrite language-prefixed URLs (e.g., /de/merge-pdf.html)
- Support all languages: en, de, es, fr, id, it, pt, tr, vi, zh, zh-TW
- Create .htaccess with internal rewrites for Apache/Hostinger hosting
## Translation Updates
- Add missing translations for digitalSignPdf, validateSignaturePdf,
emailToPdf, fontToOutline, deskewPdf to es, pt, tr, zh-TW
- Add Digital Signature and Validate Signature to homepage translation keys
- Fix language regex patterns to include all supported languages
- Fix typo in encrypt-pdf.html
- Replace duplicated navbar markup across all HTML pages with {{> navbar }} partial
- Replace duplicated footer markup across all HTML pages with {{> footer }} partial
- Add TypeScript type definitions for vite-plugin-handlebars integration
- Update vite.config.ts to support handlebars partial compilation
- Update tsconfig.json to include handlebars type definitions
- Update nginx.conf for proper static file serving with partials
- Update translation files for de, pt, tr, vi, and zh-TW locales
- Reduce code duplication and improve maintainability across 13+ HTML pages
- Ensure consistent navbar and footer behavior across the entire application
