Fix menu system error handling and OS detection

- Add comprehensive error handling to menu.sh to prevent crashes when scripts fail
- Fix OS detection in common.sh for lsb_release output parsing
- Modify preflight.sh to run all checks without early exit on failures
- Ensure menu navigation remains stable during testing phase

scripts/enhanced-setup/lib/common.sh

@@ -25,8 +25,8 @@ IS_ARM64=false
 [[ "$ARCH" == "aarch64" ]] && IS_ARM64=true
 
 # System information
-OS_NAME="$(lsb_release -si 2>/dev/null || echo "Unknown")"
-OS_VERSION="$(lsb_release -sr 2>/dev/null || echo "Unknown")"
+OS_NAME="$(lsb_release -si 2>/dev/null | tail -1 || echo "Unknown")"
+OS_VERSION="$(lsb_release -sr 2>/dev/null | tail -1 || echo "Unknown")"
 KERNEL_VERSION="$(uname -r)"
 
 # Colors for output