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/package.json

@@ -9,6 +9,9 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@pixiv/three-vrm": "^3.4.0",
+    "@react-three/drei": "^9.114.0",
+    "@react-three/fiber": "^8.17.10",
     "@tanstack/react-query": "^5.101.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
@@ -17,13 +20,15 @@
     "react-dom": "^18.3.1",
     "reagraph": "^4.22.0",
     "recharts": "^3.9.0",
-    "tailwind-merge": "^2.5.5"
+    "tailwind-merge": "^2.5.5",
+    "three": "^0.169.0"
   },
   "devDependencies": {
     "@tailwindcss/vite": "^4.0.0",
     "@types/node": "^22.10.1",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
+    "@types/three": "^0.169.0",
     "@vitejs/plugin-react": "^4.3.4",
     "tailwindcss": "^4.0.0",
     "typescript": "^5.6.3",