Add NUC Portal - infrastructure dashboard

Next.js 16 dashboard for managing NUC services via Coolify API.
Features service cards with health indicators, deployment dashboard
with live log streaming, S3-backed preview images, SSE real-time
updates, and dark mode support. 18 services across 7 categories.

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

nuc-portal/README.md

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+# NUC Portal
+
+Self-hosted services dashboard for the NUC server at 192.168.1.3.
+
+## Features
+
+- Service cards with live health status indicators
+- Bookmark links to external developer tools
+- Dark/light mode toggle
+- Search filtering across services and bookmarks
+- Category-based organization
+
+## Development
+
+```bash
+npm install
+npm run dev
+```
+
+Open http://localhost:3000
+
+## Deployment
+
+Deployed via Coolify with Nixpacks.
+
+- FQDN: http://nuc.lan
+- Build: `npm run build`