feat(onboarding): make the advisor visibly responsive — headline leads with the moving number + auto-recompute

Testing surfaced that toggling certifications appeared to "do nothing": the headline led with the TOTAL
requirement count (constant per target, e.g. 17 for CRA), and the page only recomputed on an explicit
button click. Both fixed:
  - engine.py headline now leads with the number that actually moves: "11 von 17 Anforderungen offen ·
    6 wahrscheinlich (Zertifikate) · 5 zu klären" (was "17 Anforderungen erkannt · …"). Keeps the
    "automatisch erkannt (Intake)" substring.
  - frontend auto-recomputes on certifications / target / scanner-signal change (no button needed).

Now ISO27001 alone -> "13 von 17 offen · 4 wahrscheinlich"; + ISO9001+TISAX+IEC62443 -> "11 von 17 offen ·
6 wahrscheinlich". (Domain truth stays visible: CRA's product-cyber gaps barely move with management-system
certs.) 28 onboarding+transition tests pass, check-loc 0.

admin-compliance/app/sdk/onboarding-advisor/page.tsx

@@ -96,6 +96,9 @@ export default function OnboardingAdvisorPage() {
     } finally { setLoading(false) }
   }
 
+  // auto-recompute when certifications / target / scanner signals change (no button click needed)
+  useEffect(() => { if (certs.length) run() }, [certs, target, findings])  // eslint-disable-line react-hooks/exhaustive-deps
+
   return (
     <div className="min-h-screen bg-gray-50 py-8">
       <div className="max-w-5xl mx-auto px-4">