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>

web/tailwind.config.js

@@ -0,0 +1,34 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
+  theme: {
+    extend: {
+      colors: {
+        surface: {
+          50: "rgba(255,255,255,0.05)",
+          100: "rgba(255,255,255,0.08)",
+          200: "rgba(255,255,255,0.12)",
+        },
+      },
+      backdropBlur: {
+        xs: "2px",
+      },
+      animation: {
+        "fade-in": "fadeIn 0.5s ease-out",
+        "slide-up": "slideUp 0.4s ease-out",
+        "pulse-slow": "pulse 3s ease-in-out infinite",
+      },
+      keyframes: {
+        fadeIn: {
+          "0%": { opacity: "0", transform: "translateY(8px)" },
+          "100%": { opacity: "1", transform: "translateY(0)" },
+        },
+        slideUp: {
+          "0%": { opacity: "0", transform: "translateY(16px)" },
+          "100%": { opacity: "1", transform: "translateY(0)" },
+        },
+      },
+    },
+  },
+  plugins: [],
+};