Refactor app to React Router and Tailwind

package.json

@@ -5,6 +5,8 @@
   "description": "Real-time Cabo bachelor party voting with budgets, packages, and activity planning.",
   "main": "server.js",
   "scripts": {
+    "dev": "vite --config client/vite.config.js --host 0.0.0.0",
+    "build": "vite build --config client/vite.config.js",
     "start": "node server.js"
   },
   "engines": {
@@ -13,7 +15,18 @@
   "dependencies": {
     "cors": "^2.8.5",
     "express": "^4.21.2",
+    "leaflet": "^1.9.4",
+    "react": "^19.2.7",
+    "react-dom": "^19.2.7",
+    "react-router-dom": "^7.17.0",
     "uuid": "^11.1.0",
     "ws": "^8.18.2"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-react": "^6.0.2",
+    "autoprefixer": "^10.5.0",
+    "postcss": "^8.5.15",
+    "tailwindcss": "^3.4.17",
+    "vite": "^8.0.16"
   }
 }