Tighten verbose comments in Wails UI Go code

Shorten over-long godoc/inline comments across the client/ui tray and
services code: drop narrative restatement, legacy-Fyne tangents, and text
already evident from signatures and names. Keep only the non-obvious why
(concurrency/lock ordering, platform quirks, ordering constraints, the
profile-switch state table). No code changes.

client/ui/services/version.go

@@ -8,19 +8,15 @@ import (
 	"github.com/netbirdio/netbird/version"
 )
 
-// Version is the Wails-bound facade exposing build/version metadata to the
-// frontend. Today it only reports the GUI's own version (the daemon version is
-// surfaced separately through the status feed's DaemonVersion field).
+// Version reports only the GUI's own version; the daemon version comes from
+// the status feed's DaemonVersion field.
 type Version struct{}
 
-// NewVersion constructs the Version service.
 func NewVersion() *Version {
 	return &Version{}
 }
 
-// GUI returns the version of the running UI binary, baked in at build time via
-// the version package's ldflags. Falls back to "development" for un-stamped
-// builds (see version.NetbirdVersion).
+// GUI returns the UI binary's version, stamped via ldflags ("development" if un-stamped).
 func (v *Version) GUI(_ context.Context) string {
 	return version.NetbirdVersion()
 }