[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/conn.go

@@ -0,0 +1,13 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import "github.com/netbirdio/netbird/client/proto"
+
+// DaemonConn returns a lazy gRPC client to the NetBird daemon.
+// All services receive a DaemonConn so they share a single connection.
+type DaemonConn interface {
+	Client() (proto.DaemonServiceClient, error)
+}
+
+func ptrStr(s string) *string { return &s }