feat(web): PWA — manifest, icone, meta iOS

- src/app/manifest.ts (Next 14 file convention) → /manifest.webmanifest
- public/icons/icon.svg + icon-maskable.svg (vettoriali, palette editoriale)
- scripts/generate-icons.mjs (sharp): genera icon-192/512.png,
  apple-touch-icon-180.png, icon-maskable-512.png, badge-72.png
- layout.tsx: viewport con themeColor light/dark, manifest link,
  appleWebApp meta (capable + title), icons (svg + png + apple touch)
- .eslintrc: ignora scripts Node out-of-project; lint-staged: .mjs format-only

Display standalone, lang it, theme #221d18 (ink) / bg #f6f0df (carta).
Sblocca "Installa app" su Chrome/Edge/Android e "Aggiungi alla Home" su
iOS Safari — quest'ultimo è pre-requisito per ricevere le push su iOS.

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

apps/web/.eslintrc.cjs

@@ -5,5 +5,7 @@ module.exports = {
   ignorePatterns: [
     // Service worker servito al browser: out-of-project per il TS parser.
     'public/**/*.js',
+    // Script Node ESM: out-of-project per il TS parser.
+    'scripts/**/*.mjs',
   ],
 };