#502 only exempted KDE from the #478 real-engine gate. GNOME/Mutter has the same scoped-activation path, so stock sessions with only an xkb:* layout fell through to wtype, which Mutter rejects, then clipboard-only. Allow any Wayland session without an explicit non-IBus IM to try IBus when ibus-daemon is running; unbridged compositors still hit the existing denylist. Fixes #504