[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/tray_features.go

@@ -0,0 +1,37 @@
+//go:build !android && !ios && !freebsd && !js
+
+package main
+
+import (
+	"context"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// refreshRestrictions re-reads the operator-disabled UI flags and re-gates the
+// menu. Must run on every config_changed event: the daemon re-applies its MDM
+// policy on each engine spawn.
+func (t *Tray) refreshRestrictions() {
+	r, err := t.svc.Settings.GetRestrictions(context.Background())
+	if err != nil {
+		log.Debugf("get restrictions: %v", err)
+		return
+	}
+	t.featureMu.Lock()
+	changed := t.disableProfiles != r.Features.DisableProfiles ||
+		t.disableNetworks != r.Features.DisableNetworks
+	t.disableProfiles = r.Features.DisableProfiles
+	t.disableNetworks = r.Features.DisableNetworks
+	t.featureMu.Unlock()
+	// relayoutMenu rebuilds the whole tree, so skip the no-op refresh (common case).
+	if changed {
+		t.relayoutMenu()
+	}
+}
+
+// featuresDisabled returns the cached flags under featureMu.
+func (t *Tray) featuresDisabled() (profiles, networks bool) {
+	t.featureMu.Lock()
+	defer t.featureMu.Unlock()
+	return t.disableProfiles, t.disableNetworks
+}