fix: terminal stty restore with trap (set -e kills script before restore)

set -e on line 2 causes the bash script to exit immediately when sbcl
returns non-zero, before the stty icanon echo ixon restore runs.
Add trap cleanup EXIT to guarantee terminal restore on any exit path.

passepartout

@@ -409,6 +409,10 @@ case "$COMMAND" in
     (sleep 3) (finish-output)))
 (uiop:quit 0)
 LISPEOF
+        # Restore terminal on any exit (set -e can kill the script before the
+        # explicit stty restore below if sbcl exits non-zero).
+        cleanup() { stty icanon echo ixon 2>/dev/null; }
+        trap cleanup EXIT
         # Capture terminal dimensions in non-standard env vars
         # (SBCL strips COLUMNS/LINES but leaves MY_* alone).
         ts=$(stty size 2>/dev/null)
@@ -420,9 +424,8 @@ LISPEOF
         find ~/.cache/common-lisp -name "*.fasl" -path "*cl-tty*" -delete 2>/dev/null
         sbcl --noinform --load /tmp/tui-load.lisp
         rc=$?
-        # Restore terminal cooked mode — stty was set to -icanon -echo -ixon
-        # before exec (or sbcl subprocess) to get character-at-a-time input.
-        # Without this restore the terminal stays raw after exit.
+        # Restore terminal cooked mode (also handled by trap cleanup above,
+        # but do it explicitly here for clarity).
         stty icanon echo ixon 2>/dev/null
         exit $rc
         ;;