Frontend: Voice-Umzug in Desktop-App, MC3-Prototyp, UI-Rework-Dateien auf lucy-v2, dist konsistent

- VoiceView + components/voice + lib/voice entfernt (lebt jetzt in client/lucy-desktop)
- mc3/: Basisstation-Prototyp hinter #mc3-Weiche (non-destruktiv)
- roleMeta/useLucyHealth/useExpertMode/ExpertToggle/LucyHealthCard/WarmSetManager (UI-Rework, auf main a341d25 committet, hier nachgezogen)
- dist frisch gebaut (Asset-Stand war inkonsistent: alte geloescht, neue untracked)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/mc3/Mc3Maschinenraum.tsx

@@ -0,0 +1,60 @@
+import { useState } from "react"
+import { Cpu, ShieldCheck, Bot, ChevronRight, ArrowLeft } from "lucide-react"
+import { Cockpit } from "@/views/models/Cockpit"
+import { AgentView } from "@/views/AgentView"
+import { ExpertToggle } from "@/components/ExpertToggle"
+
+// Maschinenraum = die eine Tür für alles Technische. Faltet Modelle/Wartung/Hermes
+// zusammen; jede Sektion rendert die BESTEHENDE, bewährte View wieder.
+function SectionCard({ icon: Icon, title, sub, onClick }: {
+  icon: any; title: string; sub: string; onClick: () => void
+}) {
+  return (
+    <button onClick={onClick}
+      className="w-full flex items-center gap-4 rounded-2xl border border-border/60 bg-card/45 backdrop-blur-md p-5 text-left transition-all hover:border-primary/40 cursor-pointer">
+      <Icon className="h-6 w-6 text-muted-foreground shrink-0" />
+      <div className="flex-1 min-w-0">
+        <div className="text-sm text-foreground">{title}</div>
+        <div className="text-xs text-muted-foreground">{sub}</div>
+      </div>
+      <ChevronRight className="h-5 w-5 text-muted-foreground shrink-0" />
+    </button>
+  )
+}
+
+export function Mc3Maschinenraum() {
+  const [section, setSection] = useState<null | "modelle" | "hermes">(null)
+
+  if (section) {
+    return (
+      <div className="space-y-4">
+        <button onClick={() => setSection(null)}
+          className="flex items-center gap-1.5 text-xs font-semibold text-muted-foreground hover:text-foreground transition-colors cursor-pointer">
+          <ArrowLeft className="h-4 w-4" /> Maschinenraum
+        </button>
+        {section === "modelle" ? <Cockpit /> : <AgentView />}
+      </div>
+    )
+  }
+
+  return (
+    <div className="space-y-4">
+      <div className="flex items-start justify-between gap-3">
+        <div>
+          <h1 className="text-2xl font-space font-bold tracking-tight bg-gradient-to-r from-foreground via-foreground to-primary bg-clip-text text-transparent">
+            Maschinenraum
+          </h1>
+          <p className="text-sm text-muted-foreground">Nur nötig, wenn du wirklich was ändern willst.</p>
+        </div>
+        <ExpertToggle />
+      </div>
+
+      <SectionCard icon={Cpu} title="Modelle" sub="Hirne, Coder, Immer-bereit-Set, Bibliothek"
+        onClick={() => setSection("modelle")} />
+      <SectionCard icon={ShieldCheck} title="Wartung und Logs" sub="Updates, Backup, Dienste, Logs, Zugangsdaten"
+        onClick={() => window.dispatchEvent(new CustomEvent("open-system-drawer", { detail: { tab: "maintenance" } }))} />
+      <SectionCard icon={Bot} title="Hermes und Verdrahtung" sub="Agent, Gehirn-Modell, PC-Verbindung"
+        onClick={() => setSection("hermes")} />
+    </div>
+  )
+}