- Add `generate-i18n-pages.mjs` script to pre-render localized HTML files at build time
- Add `generate-sitemap.mjs` script to generate language-aware sitemap.xml
- Create `navbar-simple.html` and `footer-simple.html` partials for simple mode
- Update all 80+ tool pages with language routing support
- Expand supported languages to 12: en, de, es, fr, it, pt, tr, vi, id, zh, zh-TW
- Update i18n.ts with new language names and support configuration
- Implement languageRouterPlugin in vite.config.ts for dev server routing
- Update nginx.conf for production static file serving from language directories
- Update TRANSLATION.md with new architecture documentation and language addition guide
- Fix relative paths in 404.html for static deployment compatibility
- Update package.json with new build scripts and dependencies
- Improves SEO through static pre-rendering and proper sitemap generation
- 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
- Add new tool to apply cryptographic signatures to PDFs using X.509 certificates
- Support PKCS#12 (.pfx, .p12) and PEM certificate formats
- Create PKCS#7 detached signatures compatible with all major PDF viewers
- Optional visible signature with customizable position, image, and text overlay
- Add translations for English, German, Vietnamese, and Chinese
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