installer: tolerate missing tty in offline finalizer

install/helpers/errors.sh

@@ -89,7 +89,6 @@ catch_errors() {
   stop_log_output
 
   if [[ -n ${OMARCHY_CHROOT_FINALIZER:-} ]]; then
-    show_cursor
     {
       echo "Omarchy installation stopped inside offline finalizer."
       echo "This command halted with exit code $exit_code:"
@@ -168,7 +167,7 @@ exit_handler() {
     catch_errors "$exit_code"
   else
     stop_log_output
-    show_cursor
+    [[ -n ${OMARCHY_CHROOT_FINALIZER:-} ]] || show_cursor
   fi
 }
 

install/helpers/presentation.sh

@@ -5,7 +5,7 @@ fi
 
 # Get terminal size from /dev/tty (works in all scenarios: direct, sourced, or piped)
 if [[ -e /dev/tty ]]; then
-  TERM_SIZE=$(stty size 2>/dev/null </dev/tty)
+  TERM_SIZE=$(stty size 2>/dev/null </dev/tty || true)
 
   if [[ -n $TERM_SIZE ]]; then
     export TERM_HEIGHT=$(echo "$TERM_SIZE" | cut -d' ' -f1)