Enhance PWA support with new install prompt and configuration updates

- Added PWAInstallPrompt component to facilitate app installation beyond the "Add to Home Screen" option.
- Updated vite.config.ts to include display_override and id properties for improved PWA manifest.
- Modified nginx configuration to ensure proper serving of the manifest with application/manifest+json type for better installability on Android.

neode-ui/src/App.vue

@@ -30,6 +30,9 @@
     <!-- PWA Update Prompt -->
     <PWAUpdatePrompt />
 
+    <!-- PWA Install Prompt (Install app, not just Add to Home Screen) -->
+    <PWAInstallPrompt />
+
     <!-- Toast notifications - top right, glass style, any page -->
     <Teleport to="body">
       <Transition name="toast">
@@ -61,6 +64,7 @@ import { ref, onMounted, onBeforeUnmount, watch } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import SplashScreen from './components/SplashScreen.vue'
 import PWAUpdatePrompt from './components/PWAUpdatePrompt.vue'
+import PWAInstallPrompt from './components/PWAInstallPrompt.vue'
 import SpotlightSearch from './components/SpotlightSearch.vue'
 import CLIPopup from './components/CLIPopup.vue'
 import AppLauncherOverlay from './components/AppLauncherOverlay.vue'