Initial commit: lottery project structure

Add core project files including:
- Client and server directories
- Backup script
- Package configuration
- Git ignore rules

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

client/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "lottery-client",
+  "version": "1.0.0",
+  "private": true,
+  "dependencies": {
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "react-router-dom": "^6.22.0",
+    "axios": "^1.6.7"
+  },
+  "devDependencies": {
+    "vite": "^5.1.0",
+    "@vitejs/plugin-react": "^4.2.1"
+  },
+  "scripts": {
+    "start": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  }
+}