fix: repair PWA offline functionality and clean up legacy files

Author: rogeriopradoj

dev/index.html

@@ -187,7 +187,6 @@ <h4 class="modal-title text-center w-100">
   <!-- Scripts -->
   <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
   <script type="module" src="/src/js/main.js"></script>
-  <script src="registerSW.js"></script>
 
   <!-- Google Analytics -->
   <script>

dev/index_en.html

@@ -187,7 +187,6 @@ <h4 class="modal-title text-center w-100">
   <!-- Scripts -->
   <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
   <script type="module" src="/src/js/main.js"></script>
-  <script src="registerSW.js"></script>
 
   <!-- Google Analytics -->
   <script>