refactor: complete rewrite as React+FastAPI dashboard

Replace monolithic Jinja2 template with modern stack:

Backend (FastAPI):
- Modular router/service architecture
- Async PostgreSQL (asyncpg) for news from n8n pipeline
- Live Unraid server stats (2 servers via API)
- Home Assistant, Vikunja tasks, weather (wttr.in)
- WebSocket broadcast for real-time updates (15s)
- TTL cache per endpoint, all config via ENV vars

Frontend (React + Vite + TypeScript):
- Glassmorphism dark theme with Tailwind CSS
- Responsive grid: mobile/tablet/desktop/ultrawide
- Weather cards, hourly forecast, news with category tabs
- Server stats (CPU ring, RAM bar, Docker list)
- Home Assistant controls, task management
- Live clock, WebSocket connection indicator

Infrastructure:
- Multi-stage Dockerfile (node:22-alpine + python:3.11-slim)
- docker-compose with full ENV configuration
- Kaniko CI/CD pipeline for GitLab registry

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

docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   daily-briefing:
     build: .
@@ -7,25 +5,23 @@ services:
     ports:
       - "8080:8080"
     environment:
-      - VIKUNJA_URL=http://10.10.10.10:3456/api/v1
-      - VIKUNJA_TOKEN=tk_dfaf845721a9fabe0656960ab77fd57cba127f8d
-      - HA_URL=https://homeassistant.daddelolymp.de
-      - HA_TOKEN=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJkZmM4M2Q5OTZiMDE0Mzg3YWEzZTMwYzkzYTNhNTRjNiIsImlhdCI6MTc3MDU5Mjk3NiwiZXhwIjoyMDg1OTUyOTc2fQ.fnldrKNQwVdz275-omj93FldpywEpfPQSq8VLcmcyu4
+      # Database (PostgreSQL)
+      - DB_HOST=10.10.10.10
+      - DB_PORT=5433
+      - DB_NAME=openclaw
+      - DB_USER=sam
+      - DB_PASSWORD=sam
+      # Weather
       - WEATHER_LOCATION=Leverkusen
-      - OPENCLAW_GATEWAY_URL=http://host.docker.internal:18789
-      - DASHBOARD_DATA_PATH=/app/data/dashboard_data.json
-      # Discord Integration
-      - DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/1470494144953581652/7g3rq2p-ynwTR9KyUhYwubIZL75NQkOR_xnXOvSsuY72qwUjmsSokfSS3Y0wae2veMem
-      - DISCORD_BOT_TOKEN=${DISCORD_BOT_TOKEN:-}
-      - DISCORD_CHANNEL_ID=${DISCORD_CHANNEL_ID:-}
-    volumes:
-      - /home/sam/briefing/dashboard_data.json:/app/data/dashboard_data.json:ro
+      - WEATHER_LOCATION_SECONDARY=Rab,Croatia
+      # Home Assistant
+      - HA_URL=https://homeassistant.daddelolymp.de
+      - HA_TOKEN=${HA_TOKEN}
+      # Vikunja Tasks
+      - VIKUNJA_URL=http://10.10.10.10:3456/api/v1
+      - VIKUNJA_TOKEN=${VIKUNJA_TOKEN}
+      # Unraid Servers (JSON array)
+      - UNRAID_SERVERS=${UNRAID_SERVERS:-[]}
     extra_hosts:
       - "host.docker.internal:host-gateway"
     restart: always
-    networks:
-      - briefing-network
-
-networks:
-  briefing-network:
-    driver: bridge