Live-Simulation: Was-waere-wenn-Regler (Roadmap 22)

Zweispalter: links Regler, rechts waehlbare Grafik, oben Kennzahlen mit
Differenz zum unveraenderten Plan. Keine eigene Rechenlogik -- die Regler
nutzen dieselben Transformationen wie der Tornado.

Neu: applyElementDriver / tunableElements fuer einzeln regelbare
Element-Renditen; livesim.ts; AllocationChart aus dem Dashboard geloest.

computePlan misst 0.2 ms auf 60 Jahren -> synchron, ohne Debounce.
Spezifikation 0.18 (4.15 und 9.27 neu), 15 Tests (124 -> 139).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/AppShell.tsx

@@ -24,6 +24,7 @@ import { PlanView } from "@/components/PlanView";
 import { Dashboard } from "@/components/Dashboard";
 import { MonteCarloDialog } from "@/components/MonteCarloDialog";
 import { SensitivityDialog } from "@/components/SensitivityDialog";
+import { LiveSimDialog } from "@/components/LiveSimDialog";
 import { SpecView } from "@/components/SpecView";
 import { SystemParametersView } from "@/components/SystemParametersView";
 import { PlanTraceDialog } from "@/components/DetailView";
@@ -85,6 +86,7 @@ function AppShellInner({ username }: { username: string }) {
   const [showCharts, setShowCharts] = useState(false);
   const [showMonteCarlo, setShowMonteCarlo] = useState(false);
   const [showSensitivity, setShowSensitivity] = useState(false);
+  const [showLiveSim, setShowLiveSim] = useState(false);
   const [showSystemParams, setShowSystemParams] = useState(false);
   const [showPlanTraces, setShowPlanTraces] = useState(false);
   const [showPalette, setShowPalette] = useState(false);
@@ -421,6 +423,10 @@ function AppShellInner({ username }: { username: string }) {
                       <BarChart3 className="h-4 w-4" />
                       Grafiken
                     </Button>
+                    <Button variant="secondary" onClick={() => setShowLiveSim(true)}>
+                      <SlidersHorizontal className="h-4 w-4" />
+                      Live-Simulation
+                    </Button>
                     <Button variant="secondary" onClick={() => setShowMonteCarlo(true)}>
                       <Dices className="h-4 w-4" />
                       Monte-Carlo-Simulation
@@ -530,6 +536,10 @@ function AppShellInner({ username }: { username: string }) {
         <SensitivityDialog plan={detail.plan} onClose={() => setShowSensitivity(false)} />
       )}
 
+      {showLiveSim && detail && (
+        <LiveSimDialog plan={detail.plan} onClose={() => setShowLiveSim(false)} />
+      )}
+
       {showPlanTraces && detail && (
         <PlanTraceDialog
           computed={computePlan(detail.plan, undefined, { explain: true })}