* fix(inject): resolve paste chord for non-QWERTY layouts
ydotool was sending physical KEY_V (47) for Ctrl+V. On German Neo that
key types p, so paste opened Print instead. Prefer wtype keysyms when
usable; otherwise resolve the evdev key for Latin v via xkbcommon, and
read KDE kxkbrc so Plasma Wayland Neo users are covered.
Fixes#787
* fix(inject): read Plasma active layout from real session sources
kxkbrc has no CurrentLayout/LayoutIndex, so multi-layout Neo always
fell back to us at index 0 and paste still hit KEY_V. Prefer D-Bus
getLayout or layout_memory.xml for the active layout, keep kxkbrc
for the list only, and prefer KDE over leftover GNOME on Plasma.
* fix(injection): use Ctrl+Shift+V when pasting into terminals
Clipboard injection always sent Ctrl+V, which most terminal emulators
ignore. Detect standalone terminal windows and send Ctrl+Shift+V, with a
Settings override for nested IDE panels that window-class detection cannot see.
* fix(injection): fail closed when terminal window probe is mocked
Clipboard tests patch text_injector.subprocess.run, which replaces
stdlib subprocess.run. Window detection now ignores non-string probe
output so injection still uses Ctrl+V instead of raising TypeError.
* docs: fix overclaimed terminal auto-detect in USER_GUIDE
Auto-detect only runs on X11 and on Hyprland, Sway, and niri. GNOME and
KDE Wayland stay on Ctrl+V unless you set Clipboard Paste Shortcut to
Ctrl+Shift+V.
