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/App.tsx

@@ -2,19 +2,20 @@ import { useEffect, useState, useCallback } from "react"
 import { Command as CommandIcon, ChevronLeft, ChevronRight } from "lucide-react"
 import { NAV, type ViewId } from "@/nav"
 import { CommandPalette } from "@/components/CommandPalette"
+import { ExpertToggle } from "@/components/ExpertToggle"
 import { DashboardView } from "@/views/DashboardView"
 import { ModelsView } from "@/views/ModelsView"
 import { ConnectView } from "@/views/ConnectView"
 import { MemoryView } from "@/views/MemoryView"
 import { AgentView } from "@/views/AgentView"
 import { TerminalView } from "@/views/TerminalView"
-import { VoiceView } from "@/views/VoiceView"
 import { GuideView } from "@/views/GuideView"
 import { Placeholder } from "@/views/Placeholder"
 import { SystemDrawer } from "@/components/SystemDrawer"
 import { useHealth, useSystemStatus } from "@/lib/queries"
 import { useMetricsFeeder } from "@/lib/metricsStore"
 import { cn } from "@/lib/utils"
+import { Mc3App } from "@/mc3/Mc3App"
 
 export default function App() {
   useMetricsFeeder()   // sammelt Live-Verlauf global, unabhängig vom aktiven Tab
@@ -30,6 +31,8 @@ export default function App() {
   const [sidebarCollapsed, setSidebarCollapsed] = useState(() => localStorage.getItem("mc_sidebar_collapsed") === "true")
   const [drawerOpen, setDrawerOpen] = useState(false)
   const [drawerTab, setDrawerTab] = useState<"maintenance" | "logs">("maintenance")
+  // MC3-Prototyp läuft nicht-destruktiv unter #mc3 (produktives MC2 bleibt Default).
+  const [isMc3, setIsMc3] = useState(() => window.location.hash === "#mc3")
 
   const { data: health } = useHealth()
   const { data: sysStatus } = useSystemStatus(20_000)
@@ -59,6 +62,7 @@ export default function App() {
 
   useEffect(() => {
     const onHash = () => {
+      setIsMc3(window.location.hash === "#mc3")
       const h = window.location.hash.slice(1) as ViewId
       if (NAV.some((n) => n.id === h)) setView(h)
     }
@@ -68,6 +72,9 @@ export default function App() {
 
   const active = NAV.find((n) => n.id === view)!
 
+  // Nicht-destruktiver MC3-Prototyp: alle Hooks liefen oben, hier nur die Weiche.
+  if (isMc3) return <Mc3App />
+
   return (
     <div className="flex h-full relative">
       {/* Background Aurora Ambient Effects */}
@@ -195,6 +202,7 @@ export default function App() {
         <header className="flex h-14 shrink-0 items-center justify-between border-b border-border/40 px-6 bg-card/20 backdrop-blur-sm">
           <div className="text-xs font-medium text-muted-foreground tracking-wide uppercase font-sans">{active.hint}</div>
           <div className="flex items-center gap-2">
+            <ExpertToggle />
             <a
               href="https://git.tobisniceshomelab.ddnsfree.com/Hitonabi/mission-control-v2/src/branch/main/docs/BEDIENUNG.md"
               target="_blank"
@@ -226,9 +234,8 @@ export default function App() {
           {view === "memory" && <MemoryView />}
           {view === "agent" && <AgentView />}
           {view === "terminal" && <TerminalView />}
-          {view === "voice" && <VoiceView />}
           {view === "guide" && <GuideView />}
-          {!["dashboard", "models", "connect", "memory", "agent", "terminal", "voice", "guide"].includes(view) && (
+          {!["dashboard", "models", "connect", "memory", "agent", "terminal", "guide"].includes(view) && (
             <Placeholder title={active.label} hint={active.hint} />
           )}
         </main>