feat(frontend): scaffold Vue 3 + Vite + Tailwind Gruvbox

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

frontend/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "jardin-frontend",
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc && vite build",
+    "preview": "vite preview",
+    "lint": "vue-tsc --noEmit"
+  },
+  "dependencies": {
+    "vue": "^3.5.13",
+    "vue-router": "^4.5.0",
+    "pinia": "^2.3.0",
+    "axios": "^1.7.9"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^5.2.1",
+    "vite": "^6.0.7",
+    "typescript": "^5.7.3",
+    "vue-tsc": "^2.2.0",
+    "tailwindcss": "^3.4.17",
+    "postcss": "^8.5.1",
+    "autoprefixer": "^10.4.20"
+  }
+}