[client/ui-wails] Show GUI and daemon versions in the About submenu

Restore the legacy Fyne UI's two disabled "GUI: x.y.z" / "Daemon: a.b.c"
entries under About so users (and support) can read the running
versions from the tray. The GUI line is baked in at build time via
version.NetbirdVersion() — the same -ldflags chain the rest of the
repo uses. The daemon line starts as "—" and is rewritten in
applyStatus on every Status snapshot whose DaemonVersion differs from
the last one we recorded, so a daemon restart with a new build
(e.g. after an enforced update) updates the menu automatically.

Drive-by: rename the local variable that shadowed the version package
in handleUpdate so the import resolves cleanly.

client/ui-wails/tray.go

@@ -16,6 +16,7 @@ import (
 	"github.com/wailsapp/wails/v3/pkg/services/notifications"
 
 	"github.com/netbirdio/netbird/client/ui-wails/services"
+	"github.com/netbirdio/netbird/version"
 )
 
 // User-facing strings exposed in the tray, OS notifications and the
@@ -48,6 +49,12 @@ const (
 	// menuInstallVersionPrefix is rewritten with the target version when
 	// the management server enforces the update.
 	menuInstallVersionPrefix = "Install version "
+	// menuGUIVersionFmt and menuDaemonVersionFmt drive the disabled
+	// version-info entries under About. The daemon line is "—" until the
+	// first Status snapshot reports the daemon's version.
+	menuGUIVersionFmt    = "GUI: %s"
+	menuDaemonVersionFmt = "Daemon: %s"
+	menuVersionUnknown   = "—"
 
 	// OS notifications.
 	notifyUpdateTitle          = "NetBird update available"
@@ -96,12 +103,13 @@ type Tray struct {
 	window *application.WebviewWindow
 	svc    TrayServices
 
-	statusItem   *application.MenuItem
-	upItem       *application.MenuItem
-	downItem     *application.MenuItem
-	exitNodeItem *application.MenuItem
-	networksItem *application.MenuItem
-	updateItem   *application.MenuItem
+	statusItem        *application.MenuItem
+	upItem            *application.MenuItem
+	downItem          *application.MenuItem
+	exitNodeItem      *application.MenuItem
+	networksItem      *application.MenuItem
+	updateItem        *application.MenuItem
+	daemonVersionItem *application.MenuItem
 
 	mu                   sync.Mutex
 	connected            bool
@@ -110,6 +118,7 @@ type Tray struct {
 	updateEnforced       bool
 	exitNodes            []string
 	lastStatus           string
+	lastDaemonVersion    string
 	notificationsEnabled bool
 	activeProfile        string
 	activeUsername       string
@@ -208,6 +217,11 @@ func (t *Tray) buildMenu() *application.Menu {
 		_ = t.app.Browser.OpenURL(urlGitHubRepo)
 	})
 	about.Add(menuDocumentation).SetEnabled(false)
+	// Disabled informational entries: the GUI version is baked in at
+	// build time via -ldflags, the daemon version comes from the first
+	// Status snapshot and is updated in applyStatus.
+	about.Add(fmt.Sprintf(menuGUIVersionFmt, version.NetbirdVersion())).SetEnabled(false)
+	t.daemonVersionItem = about.Add(fmt.Sprintf(menuDaemonVersionFmt, menuVersionUnknown)).SetEnabled(false)
 	// Hidden until the daemon emits EventUpdateAvailable. The label is
 	// rewritten in onUpdateAvailable to match the legacy Fyne UI:
 	// menuDownloadLatestVersion for opt-in, menuInstallVersionPrefix+version
@@ -353,7 +367,7 @@ func (t *Tray) onUpdateAvailable(ev *application.CustomEvent) {
 func (t *Tray) handleUpdate() {
 	t.mu.Lock()
 	enforced := t.updateEnforced
-	version := t.updateVersion
+	updateVersion := t.updateVersion
 	t.mu.Unlock()
 
 	if !enforced {
@@ -366,8 +380,8 @@ func (t *Tray) handleUpdate() {
 	// RPC the /update page is polling.
 	if t.window != nil {
 		url := "/#/update"
-		if version != "" {
-			url += "?version=" + version
+		if updateVersion != "" {
+			url += "?version=" + updateVersion
 		}
 		t.window.SetURL(url)
 		t.window.Show()
@@ -419,8 +433,12 @@ func (t *Tray) applyStatus(st services.Status) {
 	// flag in onSessionExpire.
 	sessionExpiredEnter := strings.EqualFold(st.Status, statusSessionExpired) &&
 		!strings.EqualFold(t.lastStatus, statusSessionExpired)
+	daemonVersionChanged := st.DaemonVersion != "" && st.DaemonVersion != t.lastDaemonVersion
 	t.connected = connected
 	t.lastStatus = st.Status
+	if daemonVersionChanged {
+		t.lastDaemonVersion = st.DaemonVersion
+	}
 
 	exitNodes := exitNodesFromStatus(st)
 	exitNodesChanged := !equalStrings(exitNodes, t.exitNodes)
@@ -442,6 +460,9 @@ func (t *Tray) applyStatus(st services.Status) {
 	if exitNodesChanged {
 		t.rebuildExitNodes(exitNodes)
 	}
+	if daemonVersionChanged && t.daemonVersionItem != nil {
+		t.daemonVersionItem.SetLabel(fmt.Sprintf(menuDaemonVersionFmt, st.DaemonVersion))
+	}
 	if sessionExpiredEnter {
 		t.handleSessionExpired()
 	}