Feat: Sprechen-Tab — mit Hermes per Sprache reden (Browser-Voice + 3D-Avatar)

Voll-Duplex Sprach-Interaktion vom lokalen PC mit dem vollen Hermes-Agenten
(api_server :8642, OpenAI-kompatibel → gleiche Tools + geteiltes Mem0 wie CLI/Telegram).

- Voice-Sidecar (voice_service/, eigenes Py3.12-venv ~/.voice, :8650): STT faster-whisper
  (medium, de) + gestuftes TTS — Piper (schnell, Default) + Chatterbox (premium, Voice-Cloning,
  lazy-load, CPU-Start). Analog mem0_service.
- Backend: routers/voice.py (Proxy /api/voice/stt|tts|voices + /chat-SSE an Hermes mit
  Bearer API_SERVER_KEY + X-Hermes-Session-Id für server-seitigen Verlauf). config.py:
  VOICE_SERVICE_URL + HERMES_API_KEY (Fallback aus ~/.hermes/.env). System-Dienstliste +
  Wartung (Restart/Logs) um voice-service ergänzt.
- Frontend: Sprechen-Tab mit 3D-Avatar (VRM via three-vrm) — Lippensync (Web-Audio-Pegel),
  Blinzeln, Sentiment-Mimik, Ruhepose. Avatar-Picker (CORS-freie Galerie + .vrm-Upload + URL
  + VRoid-Hub-Link) + Stimm-Auswahl. Push-to-talk (Knopf/Leertaste). Deps: three, r3f, drei.
- Deploy: deploy/voice-service.service + deploy.sh (idempotenter Sidecar-Install, enable, restart).

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

frontend/src/App.tsx

@@ -8,6 +8,7 @@ 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"
@@ -191,8 +192,9 @@ 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", "guide"].includes(view) && (
+          {!["dashboard", "models", "connect", "memory", "agent", "terminal", "voice", "guide"].includes(view) && (
             <Placeholder title={active.label} hint={active.hint} />
           )}
         </main>