Frontend : squelette React + Vite + TS + Tailwind

Scaffold de base en attendant l'intégration du design Claude Design
(« Bénévoles Festival.dc.html ») : routage, plomberie i18n (t() +
locales/fr.json), client API avec proxy Vite vers le backend. Build et
lint passent.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AwswqSChc3Rwtu61pRXiY2

frontend/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "benevoles-frontend",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "preview": "vite preview",
+    "lint": "eslint .",
+    "typecheck": "tsc -b --noEmit"
+  },
+  "dependencies": {
+    "@tanstack/react-query": "^5.59.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "react-router-dom": "^6.27.0"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.12.0",
+    "@types/node": "^22.7.5",
+    "@types/react": "^18.3.11",
+    "@types/react-dom": "^18.3.1",
+    "@typescript-eslint/eslint-plugin": "^8.8.1",
+    "@typescript-eslint/parser": "^8.8.1",
+    "@vitejs/plugin-react": "^4.3.2",
+    "autoprefixer": "^10.4.20",
+    "eslint": "^9.12.0",
+    "eslint-plugin-react-hooks": "^5.0.0",
+    "eslint-plugin-react-refresh": "^0.4.12",
+    "globals": "^15.11.0",
+    "postcss": "^8.4.47",
+    "tailwindcss": "^3.4.13",
+    "typescript": "^5.6.2",
+    "typescript-eslint": "^8.8.1",
+    "vite": "^5.4.8"
+  }
+}