Add PWA support with web app manifest

- Add apple-touch-icon.png (1024x1024) for iOS/Android home screen
- Add manifest.json for Progressive Web App support
- Update index.html with PWA meta tags and links
- Enable standalone display mode with VibeTunnel theme colors

This allows users to add VibeTunnel to their home screen on mobile devices
and have it function as a standalone app with proper icon and theming.

web/src/client/assets/index.html

@@ -13,7 +13,13 @@
     <meta name="theme-color" content="#1e1e1e">
 
     <!-- Favicon -->
-    <link rel="shortcut icon" href="/favicon.ico">
+    <link rel="icon" href="/favicon.ico">
+    
+    <!-- Single high-res Apple/Android/Web App icon -->
+    <link rel="apple-touch-icon" href="/apple-touch-icon.png">
+    
+    <!-- Web App Manifest (important for iOS/Android home screen apps) -->
+    <link rel="manifest" href="/manifest.json">
 
     <!-- Styles -->
     <link href="bundle/output.css" rel="stylesheet">

web/src/client/assets/manifest.json

@@ -0,0 +1,16 @@
+{
+  "name": "VibeTunnel",
+  "short_name": "VibeTunnel",
+  "description": "Interactive terminal sessions in your browser with real-time streaming and mobile support",
+  "start_url": "/",
+  "display": "standalone",
+  "theme_color": "#1e1e1e",
+  "background_color": "#1e1e1e",
+  "icons": [
+    {
+      "src": "/apple-touch-icon.png",
+      "sizes": "1024x1024",
+      "type": "image/png"
+    }
+  ]
+}