- Fixed lsblk output parsing that was causing syntax error at line 138
- Added head -1 and tr -d to handle multiple lines or whitespace in lsblk output
- Added numeric validation to prevent arithmetic errors
- Applied same fix to both disk detection functions (lines 138 and 244)

Auto-installer now runs without syntax errors and properly detects disk sizes.
Autologin system fully operational - console passwordless, SSH requires password.