Initial NUC Portal dashboard

- 17 internal services with live health status
- 28 external bookmarks organized by category
- Dark/light mode toggle with persistence
- Cmd+K search filtering
- Health API polling every 30 seconds

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

postcss.config.mjs

@@ -0,0 +1,7 @@
+const config = {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+};
+
+export default config;