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>

server/main.py

@@ -0,0 +1,89 @@
+"""Daily Briefing Dashboard — FastAPI Application."""
+
+from __future__ import annotations
+
+import logging
+from contextlib import asynccontextmanager
+from pathlib import Path
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+
+from server.config import settings
+from server.services import news_service
+
+logger = logging.getLogger("daily-briefing")
+logging.basicConfig(
+    level=logging.DEBUG if settings.debug else logging.INFO,
+    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """Startup / shutdown lifecycle."""
+    logger.info("Starting Daily Briefing Dashboard...")
+    logger.info(
+        "Unraid servers configured: %d",
+        len(settings.unraid_servers),
+    )
+
+    # Initialize database pool
+    try:
+        await news_service.init_pool(
+            host=settings.db_host,
+            port=settings.db_port,
+            dbname=settings.db_name,
+            user=settings.db_user,
+            password=settings.db_password,
+        )
+        logger.info("Database pool initialized")
+    except Exception:
+        logger.exception("Failed to initialize database pool — news will be unavailable")
+
+    yield
+
+    # Shutdown
+    logger.info("Shutting down...")
+    await news_service.close_pool()
+
+
+app = FastAPI(
+    title="Daily Briefing",
+    version="2.0.0",
+    lifespan=lifespan,
+)
+
+# CORS — allow frontend dev server
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# --- Register Routers ---
+from server.routers import dashboard, homeassistant, news, servers, tasks, weather  # noqa: E402
+
+app.include_router(weather.router)
+app.include_router(news.router)
+app.include_router(servers.router)
+app.include_router(homeassistant.router)
+app.include_router(tasks.router)
+app.include_router(dashboard.router)
+
+# --- Serve static frontend (production) ---
+static_dir = Path(__file__).parent.parent / "static"
+if static_dir.is_dir():
+    app.mount("/", StaticFiles(directory=str(static_dir), html=True), name="static")
+    logger.info("Serving static frontend from %s", static_dir)
+else:
+    @app.get("/")
+    async def root():
+        return {
+            "status": "ok",
+            "message": "Daily Briefing API — Frontend not built yet",
+            "endpoints": ["/api/all", "/api/weather", "/api/news", "/api/servers", "/api/ha", "/api/tasks"],
+        }