Enable i18n language switching on all pages and hide incomplete features

Added i18n.js script to all main pages (index, database, saraR4, wifi, logs, admin) to enable language switching functionality across the entire application. Commented out Map and Terminal menu items in the sidebar as these pages are not yet ready for production use.

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

html/wifi.html

@@ -117,6 +117,8 @@
 <script src="assets/jquery/jquery-3.7.1.min.js"></script>
 <!-- Link Bootstrap JS and Popper.js locally -->
 <script src="assets/js/bootstrap.bundle.js"></script>
+<!-- i18n translation system -->
+<script src="assets/js/i18n.js"></script>
 
 <script>
  document.addEventListener('DOMContentLoaded', function () {