Under the Lua config system, 'hyprctl keyword monitor ...' is rejected
("keyword can't work with non-legacy parsers") yet still exits 0, so the
panel's enable/disable row silently did nothing. Use the hl.monitor eval
API instead, as omarchy-hyprland-monitor-scaling already does.
The re-enable must pass disabled = false explicitly: hl.monitor rules
merge, so a disabled = true already in config (e.g. the
internal-monitor-disable toggle file) otherwise survives and the
re-enable no-ops.
