- Fix URL path duplication when clicking logo (added missing leading slash)
- Use network-first caching for translation files in service worker
- Add missing translation keys (common.close, upload.clearFiles) to all languages
- Add Dutch (nl) language support to URL regex patterns
- Bump service worker cache version to v8
## 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
