Add FredOS-Rescue: Claude Code rescue USB

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

hosts/rescue/menu.sh

@@ -0,0 +1,41 @@
+# Greeting for FredOS-Rescue: shown on every interactive login, and again
+# with `menu`.
+b=$'\e[1m' y=$'\e[1;33m' d=$'\e[2m' r=$'\e[0m'
+
+# The console is still littered with boot messages at this point.
+case "$(tty)" in /dev/tty*) clear ;; esac
+
+printf '%s' "$y"
+cat <<'ART'
+                         Fred's
+  ____ _                 _        ____
+ / ___| | __ _ _   _  __| | ___  |  _ \ ___  ___  ___ _   _  ___
+| |   | |/ _` | | | |/ _` |/ _ \ | |_) / _ \/ __|/ __| | | |/ _ \
+| |___| | (_| | |_| | (_| |  __/ |  _ <  __/\__ \ (__| |_| |  __/
+ \____|_|\__,_|\__,_|\__,_|\___| |_| \_\___||___/\___|\__,_|\___|
+ART
+printf '%s\n' "$r"
+
+cat <<EOF
+  ${b}rescue${r}   get online and start Claude (as root)
+  ${b}nmtui${r}    networking only (wifi, static IPs)
+  ${b}menu${r}     show this screen again
+
+  ${b}How it goes${r}
+   1. Type ${b}rescue${r}. Wired connects by itself; otherwise pick a wifi.
+   2. First start: Claude shows a login URL. Open it on your phone,
+      sign in, paste the code back here.
+   3. Tell Claude what broke: what you saw, what changed before it did.
+      It looks first, and asks before anything touches a disk.
+
+  ${d}Runs from RAM: nothing here survives a reboot. Your disks are
+  untouched until you OK a change. Keyboard is UK.${r}
+
+EOF
+
+ips=$(ip -brief -4 addr show scope global 2>/dev/null | awk '{print $3}' | cut -d/ -f1)
+if [ -n "$ips" ]; then
+  printf '  %sRemote:%s ssh root@%s\n\n' "$b" "$r" "$(echo $ips | sed 's/ / or root@/g')"
+else
+  printf '  %sRemote: not online yet; run menu again once connected.%s\n\n' "$d" "$r"
+fi