Improve the app's experience when added to the iPhone home screen

Implement Progressive Web App (PWA) features for enhanced mobile experience, including service worker registration, manifest.json updates for standalone mode, and CSS adjustments for iOS safe area and touch interactions.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ab9cd02a-d0b2-4288-9ceb-1964d0059648
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/ab9cd02a-d0b2-4288-9ceb-1964d0059648/mbX83Mu

client/public/sw.js

@@ -0,0 +1,67 @@
+// Service Worker za go4.video PWA
+const CACHE_NAME = 'go4-video-v1';
+const urlsToCache = [
+  '/',
+  '/manifest.json',
+  '/api/favicon',
+  '/api/favicon?size=192',
+  '/api/favicon?size=512'
+];
+
+// Instalacija service worker-ja
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME)
+      .then((cache) => {
+        console.log('PWA cache opened');
+        return cache.addAll(urlsToCache);
+      })
+  );
+});
+
+// Aktivacija service worker-ja
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((cacheNames) => {
+      return Promise.all(
+        cacheNames.map((cacheName) => {
+          if (cacheName !== CACHE_NAME) {
+            console.log('Deleting old cache:', cacheName);
+            return caches.delete(cacheName);
+          }
+        })
+      );
+    })
+  );
+});
+
+// Prestrezanje omrežnih zahtev
+self.addEventListener('fetch', (event) => {
+  event.respondWith(
+    caches.match(event.request)
+      .then((response) => {
+        // Vrni iz cache-a, če obstaja
+        if (response) {
+          return response;
+        }
+        
+        // Sicer povleči iz omrežja
+        return fetch(event.request).then((response) => {
+          // Preveri ali je veljaven odgovor
+          if (!response || response.status !== 200 || response.type !== 'basic') {
+            return response;
+          }
+
+          // Kloniraj odgovor
+          const responseToCache = response.clone();
+
+          caches.open(CACHE_NAME)
+            .then((cache) => {
+              cache.put(event.request, responseToCache);
+            });
+
+          return response;
+        });
+      })
+  );
+});