add client: React + Vite + Capacitor prototype

Web app React 18 + TypeScript con quattro schermate: Setup (URL server +
password + test connessione), Ingredients (lista ingredienti e preferenze),
Recipes (lista 3 ricette generate), RecipeDetail (dettaglio e procedimento).
Persistenza URL/password via Capacitor Preferences. Pronto per build Android.

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

client/package.json

@@ -0,0 +1,28 @@
+{
+  "name": "appetito-client",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview",
+    "cap:add:android": "cap add android",
+    "cap:sync": "cap sync",
+    "cap:open:android": "cap open android"
+  },
+  "dependencies": {
+    "@capacitor/android": "^6.0.0",
+    "@capacitor/core": "^6.0.0",
+    "@capacitor/preferences": "^6.0.0",
+    "react": "^18.3.0",
+    "react-dom": "^18.3.0"
+  },
+  "devDependencies": {
+    "@capacitor/cli": "^6.0.0",
+    "@types/react": "^18.3.0",
+    "@types/react-dom": "^18.3.0",
+    "@vitejs/plugin-react": "^4.3.0",
+    "typescript": "^5.4.0",
+    "vite": "^5.3.0"
+  }
+}