feat(pwa): implement service worker and PWA enhancements

- Added service worker (sw.js) for offline functionality, caching strategies, and performance improvements.
- Registered service worker in App component to manage updates and offline readiness.
- Introduced ServiceWorkerStatus component to display connection status and provide cache management controls.
- Created manifest.json for PWA configuration, including app name, icons, and display settings.
- Updated index.html with PWA meta tags and links to support mobile web app capabilities.
- Refactored authentication guards to utilize useAuthStatus hook for improved user state management.
- Removed deprecated unregister-sw.js file to streamline service worker management.

worklenz-frontend/index.html

@@ -6,6 +6,27 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <meta name="theme-color" content="#2b2b2b" />
     
+    <!-- PWA Meta Tags -->
+    <meta name="application-name" content="Worklenz" />
+    <meta name="apple-mobile-web-app-capable" content="yes" />
+    <meta name="apple-mobile-web-app-status-bar-style" content="default" />
+    <meta name="apple-mobile-web-app-title" content="Worklenz" />
+    <meta name="description" content="A comprehensive project management application for teams" />
+    <meta name="format-detection" content="telephone=no" />
+    <meta name="mobile-web-app-capable" content="yes" />
+    <meta name="msapplication-config" content="/browserconfig.xml" />
+    <meta name="msapplication-TileColor" content="#2b2b2b" />
+    <meta name="msapplication-tap-highlight" content="no" />
+    
+    <!-- Apple Touch Icons -->
+    <link rel="apple-touch-icon" href="/favicon.ico" />
+    <link rel="apple-touch-icon" sizes="152x152" href="/favicon.ico" />
+    <link rel="apple-touch-icon" sizes="180x180" href="/favicon.ico" />
+    <link rel="apple-touch-icon" sizes="167x167" href="/favicon.ico" />
+    
+    <!-- PWA Manifest -->
+    <link rel="manifest" href="/manifest.json" />
+    
     <!-- Resource hints for better loading performance -->
     <link rel="preconnect" href="https://fonts.googleapis.com" />
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />