Initial commit: Estructura backend y frontend con estándar VPS

- Backend migrado a estructura VPS (src/ subfolder)
- Frontend con estructura Vite + React 19 + Tailwind
- Configuración PostgreSQL con Pool
- API service con interceptores JWT
- Ambos servidores funcionando (backend:3001, frontend:5173)

frontend/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "ofertaweb-frontend",
+  "private": true,
+  "version": "1.0.0",
+  "description": "Frontend e-commerce para OfertaWeb.cl",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "axios": "^1.13.2",
+    "react": "^19.2.0",
+    "react-dom": "^19.2.0",
+    "react-router-dom": "^7.10.1"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.39.1",
+    "@types/react": "^19.2.5",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^5.1.1",
+    "autoprefixer": "^10.4.22",
+    "eslint": "^9.39.1",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "eslint-plugin-react-refresh": "^0.4.24",
+    "globals": "^16.5.0",
+    "postcss": "^8.5.6",
+    "tailwindcss": "^3.4.18",
+    "vite": "^7.2.4"
+  }
+}