feat: initial smart home dashboard

- Next.js 14 + TypeScript + Tailwind CSS
- Glassmorphism design with ambient orbs
- Cards: Light x2, Temperature, AirPurifier, Tasks, Weather, Savings
- Home Assistant integration (demo mode if no token)
- Vikunja tasks API
- Pulse savings API
- wttr.in weather
- Framer Motion animations
- Dark/light theme toggle
- Bottom navigation
- Dockerfile for deployment

public/manifest.json

@@ -0,0 +1,17 @@
+{
+  "name": "Smart Home Dashboard",
+  "short_name": "SmartHome",
+  "description": "Smart Home Tablet Dashboard",
+  "start_url": "/",
+  "display": "fullscreen",
+  "background_color": "#0a0a0f",
+  "theme_color": "#6366f1",
+  "orientation": "landscape",
+  "icons": [
+    {
+      "src": "/icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    }
+  ]
+}