* fix(evdev): skip pointer-motion devices in keyboard discovery
find_keyboard_devices() treated any device with a nonzero EV_KEY bitmap
as a keyboard, which includes Logitech mice (G502, MX Master 3) whose
button interfaces report key bits. The hub then grabbed them (EVIOCGRAB)
and re-emitted every event, including EV_REL pointer motion, through a
paired uinput clone — piping all cursor movement through the reader
thread and showing up as periodic cursor stutter.
Discovery now excludes devices that report pointer motion (REL_X+REL_Y
or ABS_X+ABS_Y) in both the /proc/bus/input/devices parser and the
evdev.list_devices() fallback. Wheel-only devices (REL_WHEEL) and real
keyboards are unaffected, and a mouse's separate keyboard interface
node keeps working for shortcuts.
Fixes#900
* test(evdev): annotate new device-discovery tests
* chore: drop accidentally committed pr_body.md
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Co-authored-by: Jatin K Malik <jatinkrmalik@gmail.com>
