feat(pitch-deck): passwordless investor auth, audit logs, snapshots & PWA (#2)

Adds investor-facing access controls, persistence, and PWA support to the pitch deck:

- Passwordless magic-link auth (jose JWT + nodemailer SMTP)
- Per-investor audit logging (logins, slide views, assumption changes, chat)
- Financial model snapshot persistence (auto-save/restore per investor)
- PWA support (manifest, service worker, offline caching, branded icons)
- Safeguards: email watermark overlay, security headers, content protection,
  rate limiting, IP/new-IP detection, single active session per investor
- Admin API: invite, list investors, revoke, query audit logs
- pitch-deck service added to docker-compose.coolify.yml

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pitch-deck/components/slides/FinancialsSlide.tsx

@@ -20,11 +20,12 @@ type FinTab = 'overview' | 'guv' | 'cashflow'
 
 interface FinancialsSlideProps {
   lang: Language
+  investorId: string | null
 }
 
-export default function FinancialsSlide({ lang }: FinancialsSlideProps) {
+export default function FinancialsSlide({ lang, investorId }: FinancialsSlideProps) {
   const i = t(lang)
-  const fm = useFinancialModel()
+  const fm = useFinancialModel(investorId)
   const [activeTab, setActiveTab] = useState<FinTab>('overview')
   const de = lang === 'de'
 
@@ -268,6 +269,26 @@ export default function FinancialsSlide({ lang }: FinancialsSlideProps) {
                   {de ? 'Berechne...' : 'Computing...'}
                 </div>
               )}
+
+              {/* Snapshot status + reset */}
+              {investorId && (
+                <div className="flex items-center justify-between mt-2 pt-2 border-t border-white/5">
+                  <span className="text-[9px] text-white/30">
+                    {fm.snapshotStatus === 'saving' && (de ? 'Speichere...' : 'Saving...')}
+                    {fm.snapshotStatus === 'saved' && (de ? 'Ihre Aenderungen gespeichert' : 'Your changes saved')}
+                    {fm.snapshotStatus === 'restored' && (de ? 'Ihre Werte geladen' : 'Your values restored')}
+                    {fm.snapshotStatus === 'default' && (de ? 'Standardwerte' : 'Defaults')}
+                  </span>
+                  {fm.snapshotStatus !== 'default' && (
+                    <button
+                      onClick={() => fm.activeScenarioId && fm.resetToDefaults(fm.activeScenarioId)}
+                      className="text-[9px] text-white/40 hover:text-white/70 transition-colors"
+                    >
+                      {de ? 'Zuruecksetzen' : 'Reset to defaults'}
+                    </button>
+                  )}
+                </div>
+              )}
             </div>
           </FadeInView>
         </div>