feat: expose transparent web device forwarders

internal/webdevice/service.go

@@ -128,13 +128,22 @@ func (s *Service) Scan(r *http.Request) (*ScanResult, error) {
 			}
 
 			s.allowIP(device.IP)
+			forwardPort, forwardErr := s.EnsureForwarder(device.IP)
+			if forwardErr != nil {
+				result.Errors = append(result.Errors, fmt.Sprintf("%s: 启动%s透明转发失败: %v", iface.Name, device.IP, forwardErr))
+				continue
+			}
+
+			scheme, host := requestBase(r)
 
 			deviceInfo := DeviceInfo{
-				IP:        device.IP,
-				Interface: iface.Name,
-				Port:      device.Port,
-				TargetURL: fmt.Sprintf("http://%s/", device.IP),
-				ProxyURL:  fmt.Sprintf("/proxy/web/%s/", device.IP),
+				IP:          device.IP,
+				Interface:   iface.Name,
+				Port:        device.Port,
+				TargetURL:   fmt.Sprintf("http://%s/", device.IP),
+				ProxyURL:    fmt.Sprintf("/proxy/web/%s/", device.IP),
+				DirectURL:   buildDirectURL(scheme, host, forwardPort),
+				ForwardPort: forwardPort,
 			}
 			result.Devices = append(result.Devices, deviceInfo)
 		}