feat: add homeai-desktop web assistant with LAN access

Adds the desktop web assistant app (Vite + React) with OpenClaw bridge
proxy and exposes it on the local network (host: 0.0.0.0, port 5174).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

homeai-desktop/public/manifest.json

@@ -0,0 +1,16 @@
+{
+  "name": "HomeAI Assistant",
+  "short_name": "HomeAI",
+  "description": "Desktop AI assistant powered by local LLMs",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#030712",
+  "theme_color": "#030712",
+  "icons": [
+    {
+      "src": "/icon.svg",
+      "sizes": "any",
+      "type": "image/svg+xml"
+    }
+  ]
+}