Default the install prompts to yes

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

download-images.sh

@@ -157,13 +157,13 @@ EOF
 }
 
 # Ask a yes/no question on the terminal; fails when there is none or the answer
-# is not yes. stdout carries the printed path, so all dialogue goes to /dev/tty.
+# is not yes (an empty answer means yes). stdout carries the printed path, so all dialogue goes to /dev/tty.
 ask_yes_no() {
   local answer
   { : </dev/tty >/dev/tty; } 2>/dev/null || return 1
-  printf '%s [y/N] ' "$1" >/dev/tty
+  printf '%s [Y/n] ' "$1" >/dev/tty
   read -r answer </dev/tty || return 1
-  [[ "$answer" == [yY] || "$answer" == [yY][eE][sS] ]]
+  [[ -z "$answer" || "$answer" == [yY] || "$answer" == [yY][eE][sS] ]]
 }
 
 # Print the base QCOW2 path. When the image does not exist and a terminal is