Closes the OOTB config gaps from the kitty swap (b4c86b6). Kitty installed but
shipped with bare defaults and no tmux passthrough; rescue path lost its
headless fallback when xfce4-terminal was removed.
Changes:
- panel-skel/.config/kitty/kitty.conf: font 13pt (Hack, from hack-font pkg),
quiet-dark theme + full 16-color palette, scrollback, tab bar, beam cursor.
Lands at ~/.config/kitty/kitty.conf for the clawdie user via existing
panel-skel staging (no build.sh change).
- panel-skel/.config/tmux/tmux.conf: extended-keys on + csi-u so modifier
keys (Shift-Enter, Ctrl-Arrow, Alt-Enter) reach TUIs (pi, zot, colibri-tui)
run inside tmux. XDG path (~/.config/tmux/tmux.conf), read natively by the
live USB's tmux 3.5a. Plus escape-time 0, focus-events, mouse, sane indexing.
- clawdie-xfce-session-inner: rescue terminal now falls back kitty -> xterm.
Kitty is GPU-only; without a GL surface (bhyve no-GPU VMs) it can fail to
start, leaving the operator with no rescue shell. xterm stays installed.
No build.sh change needed: both configs ride the existing
`cp -R panel-skel/.config/.` into /etc/skel/.config and /home/clawdie/.config
(build.sh:2087, :2095).
Pre-merge: confirm `pkg search kitty` on the FreeBSD build host (couldn't
reach the network from the dev sandbox).
(Sam & Claude)
