feat(iace): CRA / Cyber tab — demo CRA integration on the Kistenhub project

New "CRA / Cyber" tab in the IACE project (Zusatzmodule). Treats the
Kistenhubgeraet CE project as if it had an IoT module; invented cyber findings
are mapped to CRA Annex I requirements via the REAL backend mapper output
(faithful), and crucially cross-linked to the existing CE safety hazards they
re-open (cyber defeats a mechanically-mitigated guard -> CRA x Machinery Reg).
Frontend fixture for now; live wiring to the mapper endpoint follows.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

admin-compliance/app/sdk/iace/layout.tsx

@@ -24,6 +24,7 @@ const IACE_NAV_ITEMS = [
 ]
 
 const IACE_EXTRA_ITEMS = [
+  { id: 'cra', label: 'CRA / Cyber', href: '/cra', icon: 'shield' },
   { id: 'fmea', label: 'FMEA', href: '/fmea', icon: 'grid' },
   { id: 'knowledge-graph', label: 'Knowledge Graph', href: '/knowledge-graph', icon: 'activity' },
   { id: 'classification', label: 'Klassifikation', href: '/classification', icon: 'tag' },