```

feat(api): 添加OLT端口管理和设备发现功能

- 在check.py中更新discover_olt方法，使用scan_and_discover替代check_olt_devices
- 在olt.py中添加get_olt_ports和toggle_olt_port接口，支持获取和控制OLT端口状态
- 添加TogglePortRequest模型用于端口操作请求验证
- 更新SSHService类，新增get_olt_ports和toggle_olt_port方法
- 优化CheckService中的MAC地址索引逻辑，支持模型信息更新
```

backend/app/api/v1/check.py

@@ -80,7 +80,7 @@ def discover_olt(olt_id: int, db: Session = Depends(get_db)):
     """扫描单台 OLT 并将新发现的 MAC 自动入库关联"""
     try:
         service = CheckService(db)
-        result = asyncio.run(service.check_olt_devices(olt_id))
+        result = service.scan_and_discover(olt_id)
         return result
     except Exception as e:
         raise HTTPException(status_code=500, detail=str(e))

backend/app/api/v1/olt.py

@@ -400,3 +400,46 @@ def loopback_detection(db: Session = Depends(get_db)):
 
     # 按原始顺序返回
     return [results_map[olt.id] for olt in olts]
+
+
+class TogglePortRequest(BaseModel):
+    action: str  # "shutdown" 或 "undo shutdown"
+
+
+@router.get("/devices/{olt_id}/ports")
+def get_olt_ports(olt_id: int, db: Session = Depends(get_db)):
+    """获取指定 OLT 的所有 Olt 端口状态"""
+    from app.services.ssh_service import SSHService
+    olt = db.query(OLTDevice).filter(OLTDevice.id == olt_id).first()
+    if not olt:
+        raise HTTPException(status_code=404, detail="OLT 不存在")
+    ssh = SSHService(olt.ip_address, olt.username, olt.password)
+    try:
+        ssh.connect()
+        ports = ssh.get_olt_ports()
+        return {"ports": ports}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+    finally:
+        ssh.close()
+
+
+@router.post("/devices/{olt_id}/ports/toggle")
+def toggle_olt_port(olt_id: int, body: TogglePortRequest, port_name: str, db: Session = Depends(get_db)):
+    """开启或关闭指定 OLT 端口"""
+    from app.services.ssh_service import SSHService
+    if body.action not in ("shutdown", "undo shutdown"):
+        raise HTTPException(status_code=400, detail="action 必须为 shutdown 或 undo shutdown")
+    olt = db.query(OLTDevice).filter(OLTDevice.id == olt_id).first()
+    if not olt:
+        raise HTTPException(status_code=404, detail="OLT 不存在")
+    ssh = SSHService(olt.ip_address, olt.username, olt.password)
+    try:
+        ssh.connect()
+        ssh.toggle_olt_port(port_name, body.action)
+        return {"message": f"端口 {port_name} 已{'关闭' if body.action == 'shutdown' else '开启'}"}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+    finally:
+        ssh.close()
+