Real-keystroke on-screen keyboard for SteamOS / KDE Plasma handhelds.
Injects keycodes through /dev/uinput, so Ctrl, Alt, Super, F1-F12, Tab,
Esc and arrows work in any focused application.

- Hardware keyboard-button trigger, via Steam OSK mirroring or an
  InputPlumber profile remap to a DBus event
- Configurable opacity, layout, theme, key sizes and locale in JSON
- US / UK layout switching that also re-skins the key labels
- One-click installer, udev rule and input-group setup