feat(web): scaffold Next.js 14 app with Tailwind and next-intl

- App Router under src/app/[locale] with locale 'it' as default
- next-intl middleware and getRequestConfig with setRequestLocale
- Tailwind CSS with shared font variable and content from packages/ui
- ESLint via @ketopath/eslint-config/nextjs, tsconfig via @ketopath/tsconfig/nextjs
- Inter font, base layout, home page with translated copy and disclaimer

Tweaks to shared eslint-config:
- Disable consistent-type-imports for .cjs files (next parser is not @typescript-eslint)
- Configure import resolver to discover tsconfig in apps/* and packages/*
- Drop *.config.* ignore patterns (overrides handle them with env.node)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/.env.example

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+# Next.js
+NEXT_PUBLIC_APP_URL=http://localhost:3000
+
+# Clerk (verrà configurato in uno step dedicato)
+# NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY=
+# CLERK_SECRET_KEY=
+
+# Sentry (verrà configurato in uno step dedicato)
+# NEXT_PUBLIC_SENTRY_DSN=

apps/web/.eslintrc.cjs

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+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+  root: true,
+  extends: ['@ketopath/eslint-config/nextjs.cjs'],
+};

apps/web/.gitignore

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+.next/
+out/
+next-env.d.ts.bak
+.vercel/
+*.tsbuildinfo

apps/web/messages/it.json

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+{
+  "Home": {
+    "title": "KetoPath",
+    "tagline": "Il tuo percorso personalizzato verso uno stile di vita chetogenico sostenibile.",
+    "ctaPrimary": "Inizia gratis",
+    "ctaSecondary": "Scopri come funziona",
+    "disclaimer": "Le informazioni fornite da questa app non sostituiscono il parere di un medico."
+  },
+  "Metadata": {
+    "title": "KetoPath — Chetogenica e digiuno intermittente personalizzati",
+    "description": "Web app italiana per la gestione strutturata di chetogenica e digiuno intermittente, con piani adattivi, tracking e lista della spesa automatica."
+  }
+}

apps/web/next-env.d.ts

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+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/app/building-your-application/configuring/typescript for more information.

apps/web/next.config.mjs

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+import createNextIntlPlugin from 'next-intl/plugin';
+
+const withNextIntl = createNextIntlPlugin('./src/i18n.ts');
+
+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  reactStrictMode: true,
+  transpilePackages: ['@ketopath/shared', '@ketopath/ui'],
+  experimental: {
+    typedRoutes: true,
+  },
+};
+
+export default withNextIntl(nextConfig);

apps/web/package.json

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+{
+  "name": "@ketopath/web",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev --port 3000",
+    "build": "next build",
+    "start": "next start --port 3000",
+    "typecheck": "tsc --noEmit",
+    "lint": "next lint --max-warnings=0"
+  },
+  "dependencies": {
+    "@ketopath/shared": "workspace:*",
+    "@ketopath/ui": "workspace:*",
+    "next": "^14.2.5",
+    "next-intl": "^3.17.2",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1"
+  },
+  "devDependencies": {
+    "@ketopath/eslint-config": "workspace:*",
+    "@ketopath/tsconfig": "workspace:*",
+    "@types/node": "^20.12.7",
+    "@types/react": "^18.3.3",
+    "@types/react-dom": "^18.3.0",
+    "autoprefixer": "^10.4.19",
+    "eslint-config-next": "^14.2.5",
+    "postcss": "^8.4.39",
+    "tailwindcss": "^3.4.4"
+  }
+}

apps/web/postcss.config.mjs

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+/** @type {import('postcss-load-config').Config} */
+const config = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};
+
+export default config;

apps/web/src/app/[locale]/layout.tsx

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+import type { Metadata } from 'next';
+import { Inter } from 'next/font/google';
+import { notFound } from 'next/navigation';
+import { NextIntlClientProvider } from 'next-intl';
+import { getMessages, getTranslations, setRequestLocale } from 'next-intl/server';
+import type { ReactNode } from 'react';
+
+import { locales, type Locale } from '@/i18n';
+
+import '@/styles/globals.css';
+
+const inter = Inter({
+  subsets: ['latin'],
+  variable: '--font-sans',
+  display: 'swap',
+});
+
+export function generateStaticParams() {
+  return locales.map((locale) => ({ locale }));
+}
+
+export async function generateMetadata({
+  params: { locale },
+}: {
+  params: { locale: string };
+}): Promise<Metadata> {
+  const t = await getTranslations({ locale, namespace: 'Metadata' });
+  return {
+    title: t('title'),
+    description: t('description'),
+  };
+}
+
+export default async function LocaleLayout({
+  children,
+  params: { locale },
+}: {
+  children: ReactNode;
+  params: { locale: string };
+}) {
+  if (!locales.includes(locale as Locale)) {
+    notFound();
+  }
+
+  setRequestLocale(locale);
+
+  const messages = await getMessages();
+
+  return (
+    <html lang={locale} className={inter.variable}>
+      <body className="min-h-screen bg-white font-sans text-slate-900 antialiased">
+        <NextIntlClientProvider locale={locale} messages={messages}>
+          {children}
+        </NextIntlClientProvider>
+      </body>
+    </html>
+  );
+}

apps/web/src/app/[locale]/page.tsx

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+import { useTranslations } from 'next-intl';
+import { setRequestLocale } from 'next-intl/server';
+
+export default function HomePage({ params: { locale } }: { params: { locale: string } }) {
+  setRequestLocale(locale);
+  const t = useTranslations('Home');
+
+  return (
+    <main className="mx-auto flex min-h-screen max-w-3xl flex-col items-start justify-center gap-6 px-6 py-16">
+      <h1 className="text-4xl font-bold tracking-tight sm:text-5xl">{t('title')}</h1>
+      <p className="text-lg text-slate-600">{t('tagline')}</p>
+      <div className="flex flex-wrap gap-3">
+        <button
+          type="button"
+          className="rounded-md bg-emerald-600 px-5 py-2.5 text-sm font-medium text-white shadow-sm hover:bg-emerald-700 focus:outline-none focus-visible:ring-2 focus-visible:ring-emerald-500"
+        >
+          {t('ctaPrimary')}
+        </button>
+        <button
+          type="button"
+          className="rounded-md border border-slate-300 bg-white px-5 py-2.5 text-sm font-medium text-slate-700 shadow-sm hover:bg-slate-50 focus:outline-none focus-visible:ring-2 focus-visible:ring-slate-400"
+        >
+          {t('ctaSecondary')}
+        </button>
+      </div>
+      <p className="mt-8 text-xs text-slate-500">{t('disclaimer')}</p>
+    </main>
+  );
+}

apps/web/src/i18n.ts

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+import { notFound } from 'next/navigation';
+import { getRequestConfig } from 'next-intl/server';
+
+export const locales = ['it'] as const;
+export const defaultLocale = 'it' as const;
+
+export type Locale = (typeof locales)[number];
+
+export default getRequestConfig(async ({ locale }) => {
+  if (!locales.includes(locale as Locale)) {
+    notFound();
+  }
+
+  return {
+    locale: locale as Locale,
+    messages: (await import(`../messages/${locale}.json`)).default,
+  };
+});

apps/web/src/middleware.ts

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+import createMiddleware from 'next-intl/middleware';
+
+import { defaultLocale, locales } from './i18n';
+
+export default createMiddleware({
+  locales,
+  defaultLocale,
+  localePrefix: 'as-needed',
+});
+
+export const config = {
+  matcher: ['/((?!api|_next|_vercel|.*\\..*).*)'],
+};

apps/web/src/styles/globals.css

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+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@layer base {
+  html {
+    -webkit-text-size-adjust: 100%;
+  }
+}

apps/web/tailwind.config.ts

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+import type { Config } from 'tailwindcss';
+
+const config: Config = {
+  content: ['./src/**/*.{ts,tsx}', '../../packages/ui/src/**/*.{ts,tsx}'],
+  theme: {
+    extend: {
+      fontFamily: {
+        sans: ['var(--font-sans)', 'system-ui', 'sans-serif'],
+      },
+    },
+  },
+  plugins: [],
+};
+
+export default config;

apps/web/tsconfig.json

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+{
+  "extends": "@ketopath/tsconfig/nextjs.json",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["./src/*"]
+    },
+    "incremental": true,
+    "plugins": [{ "name": "next" }]
+  },
+  "include": ["next-env.d.ts", "src/**/*.ts", "src/**/*.tsx", ".next/types/**/*.ts"],
+  "exclude": ["node_modules", ".next"]
+}