feat: initial full-stack nyaa-crawler implementation

- Node.js + TypeScript + Express backend using built-in node:sqlite
- React + Vite frontend with dark-themed UI
- Nyaa.si RSS polling via fast-xml-parser
- Watch list with show/episode CRUD and status tracking
- Auto-download scheduler with node-cron (configurable interval)
- .torrent file downloader with batch-release filtering
- Settings page for poll interval and quality defaults
- Dockerfile and docker-compose for Unraid deployment
- SQLite DB with migrations (shows, episodes, settings tables)

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

vite.config.ts

@@ -0,0 +1,16 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+export default defineConfig({
+  plugins: [react()],
+  root: 'src/client',
+  build: {
+    outDir: '../../dist/client',
+    emptyOutDir: true,
+  },
+  server: {
+    proxy: {
+      '/api': 'http://localhost:3000',
+    },
+  },
+})