Vendor the command set the menu and shell depend on

bin/blob-restart-xcompose

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# blob:summary=Restart the XCompose input method service (fcitx5) to apply new compose key settings.
+
+# A fcitx5 running outside the unit owns org.fcitx.Fcitx5, so the unit's
+# instance would exit on arrival and the stale process would keep serving the
+# old ~/.XCompose -- a restart that reports success and changes nothing.
+systemctl --user stop blob-fcitx5.service
+pkill -x fcitx5 >/dev/null 2>&1 || true
+systemctl --user start blob-fcitx5.service