Add SHIFT+Print (region → file) and CTRL+Print (screen → file) next to
the existing bare Print (region → clipboard). Each saves a timestamped
PNG under ~/Pictures/Screenshots and toasts the path — the same grim/slurp
plumbing and directory the Capture menu's "→ file" rows already use.
Single-source keybinds.nix, so the SUPER+? cheatsheet lists both new rows.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>