Refactor: Java-Klassen aus Services entfernt + kritische Bugs gefixt

- AuthService, SystemInfo, IdentitiesManager Klassen → Modul-Funktionen
- grp.getall() → grp.getgrall() (Bug: Methode existierte nie)
- open('/proc/loadavg') ohne context manager gefixt (File-Handle-Leak)
- rx_packets/tx_packets null-check im Frontend (toLocaleString auf undefined)
- PoolCard onClick: /pools/{name} → /zfs (Route existierte nicht, löste Seitenreload aus)
- Alle Router-Imports auf Modul-Aliase umgestellt

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

backend/routers/auth.py

@@ -6,7 +6,7 @@ from fastapi import APIRouter, Depends, HTTPException, status
 from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from pydantic import BaseModel
 
-from services.auth import auth_service
+from services import auth as auth_service
 from models import Token
 
 router = APIRouter(prefix="/api/auth", tags=["auth"])

backend/routers/datasets.py

@@ -8,7 +8,7 @@ from typing import List, Optional
 from pydantic import BaseModel
 
 from services.zfs_runner import zfs_runner
-from services.auth import auth_service
+from services import auth as auth_service
 from models import Dataset, DatasetType
 
 router = APIRouter(prefix="/api/datasets", tags=["datasets"])

backend/routers/identities.py

@@ -7,8 +7,8 @@ from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from pydantic import BaseModel
 from typing import Optional
 
-from services.identities import identities_manager
-from services.auth import auth_service
+from services import identities as identities_manager
+from services import auth as auth_service
 
 router = APIRouter(prefix="/api/identities", tags=["identities"])
 security = HTTPBearer()

backend/routers/navigator.py

@@ -14,7 +14,7 @@ import jwt
 from datetime import datetime, timedelta
 
 from services.file_manager import file_manager
-from services.auth import auth_service
+from services import auth as auth_service
 
 router = APIRouter(prefix="/api/navigator", tags=["navigator"])
 security = HTTPBearer()

backend/routers/pools.py

@@ -8,7 +8,7 @@ from typing import List
 import re
 
 from services.zfs_runner import zfs_runner
-from services.auth import auth_service
+from services import auth as auth_service
 from models import Pool, PoolStatus, PoolHealth
 
 router = APIRouter(prefix="/api/pools", tags=["pools"])

backend/routers/shares.py

@@ -8,7 +8,7 @@ from pydantic import BaseModel
 from typing import Optional
 
 from services.shares import share_manager
-from services.auth import auth_service
+from services import auth as auth_service
 
 router = APIRouter(prefix="/api/shares", tags=["shares"])
 security = HTTPBearer()

backend/routers/snapshots.py

@@ -9,7 +9,7 @@ from pydantic import BaseModel
 from datetime import datetime
 
 from services.zfs_runner import zfs_runner
-from services.auth import auth_service
+from services import auth as auth_service
 from models import Snapshot
 
 router = APIRouter(prefix="/api/snapshots", tags=["snapshots"])

backend/routers/system.py

@@ -6,8 +6,8 @@ from fastapi import APIRouter, Depends, HTTPException, status
 from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from pydantic import BaseModel
 
-from services.system_info import system_info
-from services.auth import auth_service
+from services import system_info
+from services import auth as auth_service
 
 router = APIRouter(prefix="/api/system", tags=["system"])
 security = HTTPBearer()