[DOCS+I18N] Guida aggiornata, i18n idle timeout, 3 documenti commerciali

- help.js: aggiornate sezioni per idle timeout, banner AI dismissible, matrice rischi real-time
- i18n.js: aggiunte 5 chiavi session.* per idle timeout (IT/EN)
- common.js: _showIdleWarning() usa I18n.t() per testi IT/EN
- docs/commercial/scheda-commerciale.html: scheda A4 stampabile (problema/soluzione, moduli, AI, target)
- docs/commercial/scheda-tecnica.html: specifiche stack, architettura, API, DB, sicurezza, deploy
- docs/commercial/presentazione.html: presentazione 10 slide completa (contesto, moduli, AI, compliance, ROI, roadmap)

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

public/js/common.js

@@ -510,25 +510,26 @@ function _showIdleWarning() {
         'background:rgba(0,0,0,0.55)', 'display:flex', 'align-items:center', 'justify-content:center'
     ].join(';');
 
+    const _t = (key, fallback) => (typeof I18n !== 'undefined' ? I18n.t(key) : fallback);
     overlay.innerHTML = `
         <div style="background:var(--card-bg,#fff);border-radius:12px;padding:32px;max-width:400px;width:90%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,0.3);">
             <div style="width:56px;height:56px;background:#fff7ed;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;">
                 <svg width="28" height="28" viewBox="0 0 20 20" fill="#c2410c"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-12a1 1 0 10-2 0v4a1 1 0 00.293.707l2.828 2.829a1 1 0 101.415-1.415L11 9.586V6z" clip-rule="evenodd"/></svg>
             </div>
-            <h3 style="font-size:1.1rem;font-weight:700;color:var(--gray-800,#1f2937);margin-bottom:8px;">Sessione in scadenza</h3>
+            <h3 style="font-size:1.1rem;font-weight:700;color:var(--gray-800,#1f2937);margin-bottom:8px;">${_t('session.expiring_title', 'Sessione in scadenza')}</h3>
             <p style="font-size:0.875rem;color:var(--gray-500,#6b7280);margin-bottom:20px;">
-                Per motivi di sicurezza, verrai disconnesso tra<br>
+                ${_t('session.expiring_msg', 'Per motivi di sicurezza, verrai disconnesso tra')}<br>
                 <strong id="idle-countdown" style="font-size:1.5rem;color:#c2410c;display:block;margin:8px 0;">5:00</strong>
-                a causa di inattivita'.
+                ${_t('session.idle_reason', "a causa di inattivita'.")}
             </p>
             <div style="display:flex;gap:12px;justify-content:center;">
                 <button id="idle-stay-btn"
                     style="padding:10px 24px;background:var(--primary,#2563eb);color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer;font-size:0.875rem;">
-                    Rimani connesso
+                    ${_t('session.stay', 'Rimani connesso')}
                 </button>
                 <button onclick="api.logout();"
                     style="padding:10px 24px;background:var(--gray-100,#f3f4f6);color:var(--gray-700,#374151);border:none;border-radius:8px;font-weight:600;cursor:pointer;font-size:0.875rem;">
-                    Disconnetti
+                    ${_t('session.logout_now', 'Disconnetti')}
                 </button>
             </div>
         </div>