Implement Linux-style Ctrl shortcuts (Ctrl+C/V/X/Z for clipboard, Ctrl+N/T/W
for navigation, etc.) while preserving terminal behavior where Ctrl+C sends
SIGINT. Uses per-app NSUserKeyEquivalents to remap Ghostty back to Cmd for
clipboard operations.
Also consolidate aerospace configuration by moving spans-displays preference
from system-level module to home-manager role, allowing full aerospace
configuration to live in home-manager for better modularity.
John Ogle
ade60ba5ec