Feature: Disk-ID Namen + SMART-Daten on demand im VdevTree

- Backend: get_disk_id_map() liest /dev/disk/by-id/ dynamisch aus (ata/nvme/scsi/wwn)
- Backend: _annotate_disk_ids() hängt disk_id an Leaf-Vdevs in get_pool_status()
- Backend: get_smart_info() liest smartctl --json (Modell, Temp, Health, Stunden, Sektoren)
- Backend: GET /api/pools/disks/{disk}/smart Endpoint
- Frontend: DiskRow zeigt Modellname neben sda/sdb, aufklappbar für SMART-Details
- Frontend: Temp-Spalte farbcodiert (grün/gelb/rot), SMART-Spalte zeigt PASSED/FAILED

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

backend/routers/pools.py

@@ -5,6 +5,7 @@ Pool management endpoints
 from fastapi import APIRouter, Depends, HTTPException, status
 from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from typing import List
+import re
 
 from services.zfs_runner import zfs_runner
 from services.auth import auth_service
@@ -164,6 +165,22 @@ async def disk_detach(pool_name: str, disk: str, current_user: str = Depends(get
         raise HTTPException(status_code=500, detail=str(e))
 
 
+@router.get("/disks/{disk}/smart")
+async def get_disk_smart(disk: str, current_user: str = Depends(get_current_user)):
+    """
+    Get SMART data for a specific disk (e.g. sda, sdb, nvme0n1).
+    Requires smartmontools installed on the system.
+    """
+    # Basic validation to prevent path traversal
+    if not re.match(r'^[a-zA-Z0-9]+$', disk):
+        raise HTTPException(status_code=400, detail="Invalid disk name")
+    try:
+        data = zfs_runner.get_smart_info(disk)
+        return data
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
 @router.post("/clear-cache")
 async def clear_cache(current_user: str = Depends(get_current_user)):
     """