[client] UI refactor (#6069)

Refactor UI

---------

Co-authored-by: Eduard Gert <kontakt@eduardgert.de>
Co-authored-by: braginini <bangvalo@gmail.com>
Co-authored-by: Pascal Fischer <32096965+pascal-fischer@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: riccardom <riccardomanfrin@gmail.com>

client/ui/services/forwarding.go

@@ -0,0 +1,83 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import (
+	"context"
+
+	"github.com/netbirdio/netbird/client/proto"
+)
+
+// PortRange is a port range; both ends are inclusive.
+type PortRange struct {
+	Start uint32 `json:"start"`
+	End   uint32 `json:"end"`
+}
+
+// PortInfo holds exactly one of Port or Range (the daemon's oneof).
+type PortInfo struct {
+	Port  *uint32    `json:"port,omitempty"`
+	Range *PortRange `json:"range,omitempty"`
+}
+
+// ForwardingRule is one entry from the daemon's reverse-proxy table.
+type ForwardingRule struct {
+	Protocol           string   `json:"protocol"`
+	DestinationPort    PortInfo `json:"destinationPort"`
+	TranslatedAddress  string   `json:"translatedAddress"`
+	TranslatedHostname string   `json:"translatedHostname"`
+	TranslatedPort     PortInfo `json:"translatedPort"`
+}
+
+// Forwarding groups the daemon RPCs that surface exposed/forwarded services.
+type Forwarding struct {
+	conn DaemonConn
+}
+
+func NewForwarding(conn DaemonConn) *Forwarding {
+	return &Forwarding{conn: conn}
+}
+
+func (s *Forwarding) List(ctx context.Context) ([]ForwardingRule, error) {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return nil, err
+	}
+	resp, err := cli.ForwardingRules(ctx, &proto.EmptyRequest{})
+	if err != nil {
+		return nil, err
+	}
+	out := make([]ForwardingRule, 0, len(resp.GetRules()))
+	for _, r := range resp.GetRules() {
+		out = append(out, forwardingRuleFromProto(r))
+	}
+	return out, nil
+}
+
+func forwardingRuleFromProto(r *proto.ForwardingRule) ForwardingRule {
+	return ForwardingRule{
+		Protocol:           r.GetProtocol(),
+		DestinationPort:    portInfoFromProto(r.GetDestinationPort()),
+		TranslatedAddress:  r.GetTranslatedAddress(),
+		TranslatedHostname: r.GetTranslatedHostname(),
+		TranslatedPort:     portInfoFromProto(r.GetTranslatedPort()),
+	}
+}
+
+func portInfoFromProto(p *proto.PortInfo) PortInfo {
+	if p == nil {
+		return PortInfo{}
+	}
+	switch sel := p.GetPortSelection().(type) {
+	case *proto.PortInfo_Port:
+		port := sel.Port
+		return PortInfo{Port: &port}
+	case *proto.PortInfo_Range_:
+		r := sel.Range
+		if r == nil {
+			return PortInfo{}
+		}
+		return PortInfo{Range: &PortRange{Start: r.GetStart(), End: r.GetEnd()}}
+	}
+	return PortInfo{}
+}