feat: improve PWA update mechanism with visibility check

src/App.vue

@@ -5,6 +5,7 @@ import Header from './components/Header.vue'
 import Footer from './components/Footer.vue'
 import Sidebar from './components/Sidebar.vue'
 import InstallPrompt from './components/InstallPrompt.vue'
+import ReloadPrompt from './components/ReloadPrompt.vue'
 
 const isSidebarOpen = ref(window.innerWidth >= 768)
 const router = useRouter()
@@ -53,6 +54,7 @@ onUnmounted(() => {
   </div>
   <Footer />
   <InstallPrompt />
+  <ReloadPrompt />
 </template>
 
 <style scoped>