The Copilot key only exists on the laptop and rutherford binds its own
AltGr per-host, so the shared keybindings file no longer carries
machine-specific dictation keys; Chester's F23 and Pause binds live
with Chester's config now.
The hosts files were written capitalized (Rutherford.lua, Chester.lua)
but the require uses the hostname exactly as `hostname` prints it —
lowercase — so on a case-sensitive filesystem the lookup missed and
pcall silently swallowed it. The per-host monitor overrides therefore
never loaded on either machine. Normalize the hostname to lowercase
and name the files in lowercase so any casing matches.
