fix+docs: Bug-Fixes, vollstaendige Dokumentation v8

Bug-Fixes:
- hermes_agent.py: asyncio.get_event_loop() → get_running_loop() (Python 3.10+)
- routers/hermes.py: Thread-Lock fuer Whisper-Init, HERMES_WINDOWS_USER Import,
  Piper stderr logging, __import__ Anti-Pattern entfernt
- routers/memory.py: SQLite WAL-Mode, Kategorie-Enum-Validierung (user/instruction/stable/versioned/ephemeral)
- HermesPanel.svelte: findLast() → reverse().find() (Browser-Kompatibilitaet)
- ConnectPanel.svelte: Hardcoded Username durch Platzhalter ersetzt

Docs:
- CLAUDE.md: komplett aktualisiert (v7+v8, Hermes, Memory, alle Env-Vars)
- ROADMAP.md: v7+v8 als erledigt, naechste Features (v8.1-v9.1)
- README.md: komplett neu geschrieben (Agentic OS Konzept, alle Features)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

routers/hermes.py

@@ -14,6 +14,7 @@ import hashlib
 import json
 import subprocess
 import tempfile
+import threading
 from pathlib import Path
 from typing import Optional
 
@@ -23,7 +24,7 @@ from fastapi.responses import Response, JSONResponse
 from auth import auth
 from config import (
     PIPER_BIN, PIPER_VOICE, WHISPER_MODEL_SIZE,
-    HERMES_WINDOWS_HOST, HERMES_SSH_KEY,
+    HERMES_WINDOWS_HOST, HERMES_WINDOWS_USER, HERMES_SSH_KEY,
 )
 from hermes_agent import run_agent
 
@@ -35,23 +36,28 @@ router = APIRouter(prefix="/api")
 
 _whisper_model = None
 _whisper_loading = False
+_whisper_lock = threading.Lock()
 
 
 def _get_whisper():
     global _whisper_model, _whisper_loading
-    if _whisper_model is not None:
-        return _whisper_model
-    if _whisper_loading:
-        return None
-    _whisper_loading = True
+    with _whisper_lock:
+        if _whisper_model is not None:
+            return _whisper_model
+        if _whisper_loading:
+            return None
+        _whisper_loading = True
     try:
         from faster_whisper import WhisperModel
-        _whisper_model = WhisperModel(WHISPER_MODEL_SIZE, device="cpu", compute_type="int8")
+        model = WhisperModel(WHISPER_MODEL_SIZE, device="cpu", compute_type="int8")
+        with _whisper_lock:
+            _whisper_model = model
+        return model
     except Exception:
-        _whisper_model = None
+        return None
     finally:
-        _whisper_loading = False
-    return _whisper_model
+        with _whisper_lock:
+            _whisper_loading = False
 
 
 # ---------------------------------------------------------------------------
@@ -75,6 +81,7 @@ def _tts(text: str) -> Optional[bytes]:
             input=text, capture_output=True, text=True, timeout=30
         )
         if result.returncode != 0:
+            print(f"[Piper] Fehler: {result.stderr or 'exit '+str(result.returncode)}")
             return None
         audio = Path(wav_path).read_bytes()
         if len(_tts_cache) >= 64:
@@ -190,7 +197,7 @@ def hermes_status():
             c.set_missing_host_key_policy(paramiko.AutoAddPolicy())
             c.connect(
                 HERMES_WINDOWS_HOST,
-                username=__import__("config").HERMES_WINDOWS_USER,
+                username=HERMES_WINDOWS_USER,
                 key_filename=str(HERMES_SSH_KEY),
                 timeout=3,
             )