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/public/manifest.json

@@ -0,0 +1,78 @@
+{
+  "name": "Worklenz - Project Management",
+  "short_name": "Worklenz",
+  "description": "A comprehensive project management application for teams",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#ffffff",
+  "theme_color": "#2b2b2b",
+  "orientation": "portrait-primary",
+  "categories": ["productivity", "business"],
+  "lang": "en",
+  "scope": "/",
+  "icons": [
+    {
+      "src": "/favicon.ico",
+      "sizes": "16x16 32x32 48x48",
+      "type": "image/x-icon",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/assets/icons/icon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/assets/icons/icon-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
+    }
+  ],
+  "shortcuts": [
+    {
+      "name": "Dashboard",
+      "short_name": "Dashboard",
+      "description": "View your project dashboard",
+      "url": "/worklenz",
+      "icons": [
+        {
+          "src": "/favicon.ico",
+          "sizes": "16x16 32x32 48x48"
+        }
+      ]
+    },
+    {
+      "name": "Tasks",
+      "short_name": "Tasks",
+      "description": "Manage your tasks",
+      "url": "/worklenz/tasks",
+      "icons": [
+        {
+          "src": "/favicon.ico",
+          "sizes": "16x16 32x32 48x48"
+        }
+      ]
+    }
+  ],
+  "screenshots": [
+    {
+      "src": "/assets/images/screenshot-desktop.png",
+      "sizes": "1280x720",
+      "type": "image/png",
+      "form_factor": "wide"
+    },
+    {
+      "src": "/assets/images/screenshot-mobile.png",
+      "sizes": "480x854",
+      "type": "image/png",
+      "form_factor": "narrow"
+    }
+  ],
+  "prefer_related_applications": false,
+  "related_applications": [],
+  "launch_handler": {
+    "client_mode": "focus-existing"
+  }
+}