[client] close windows when process needs to exit (#4027)

This PR fixes a bug by ensuring that the advanced settings and re-authentication windows are closed appropriately when the main GUI process exits.

- Updated runSelfCommand calls throughout the UI to pass a context parameter.
- Modified runSelfCommand’s signature and its internal command invocation to use exec.CommandContext for proper cancellation handling.

client/ui/client_ui.go

@@ -879,7 +879,7 @@ func (s *serviceClient) onUpdateAvailable() {
 func (s *serviceClient) onSessionExpire() {
 	s.sendNotification = true
 	if s.sendNotification {
-		s.eventHandler.runSelfCommand("login-url", "true")
+		s.eventHandler.runSelfCommand(s.ctx, "login-url", "true")
 		s.sendNotification = false
 	}
 }