seems trying to manually update the 15 ‘kept back’ packages (see list at bottom) only took two steps to trash system:
> ~/Desktop$ sudo apt install gir1.2-polkit-1.0
This one above killed the hibernate button before and after rebooting ~ nautilus OK after reboot… and only 9 packages held back afterwards, so, next did…
> ~/Desktop$ sudo apt install libegl-mesa0
The one above broke nautilus even before rebooting… and the held back packages went to zero… lots of other things got broke too like some apps blink/freeze/crash including the ubuntu settings window… major corruption!!!
BUT, software updater came up w/o the usual ‘Partial Upgrade’ or ‘Continue’ options - just the list came up to delete unused headers…
Had to restore system using G4L lzop image made a few days ago - would be nice to just remove/disable/hold/uninstall/etc. these 15 held back packages so this very dangerous partial upgrade option on software updater would just go away 
~/Desktop$ apt list --upgradable
Listing... Done
gir1.2-polkit-1.0/noble-security 124-2ubuntu1.24.04.3 amd64 [upgradable from: 124-2ubuntu1.24.04.2]
libegl-mesa0/noble-security 25.2.8-0ubuntu0.24.04.2 amd64 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
libgbm1/noble-security 25.2.8-0ubuntu0.24.04.2 amd64 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
libgbm1/noble-security 25.2.8-0ubuntu0.24.04.2 i386 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
libgl1-mesa-dri/noble-security 25.2.8-0ubuntu0.24.04.2 amd64 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
libgl1-mesa-dri/noble-security 25.2.8-0ubuntu0.24.04.2 i386 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
libglx-mesa0/noble-security 25.2.8-0ubuntu0.24.04.2 amd64 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
libglx-mesa0/noble-security 25.2.8-0ubuntu0.24.04.2 i386 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
libpolkit-agent-1-0/noble-security 124-2ubuntu1.24.04.3 amd64 [upgradable from: 124-2ubuntu1.24.04.2]
libpolkit-gobject-1-0/noble-security 124-2ubuntu1.24.04.3 amd64 [upgradable from: 124-2ubuntu1.24.04.2]
mesa-libgallium/noble-security 25.2.8-0ubuntu0.24.04.2 amd64 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
mesa-libgallium/noble-security 25.2.8-0ubuntu0.24.04.2 i386 [upgradable from: 25.0.7-0ubuntu0.24.04.2]
pkexec/noble-security 124-2ubuntu1.24.04.3 amd64 [upgradable from: 124-2ubuntu1.24.04.2]
policykit-1/noble-security 124-2ubuntu1.24.04.3 amd64 [upgradable from: 124-2ubuntu1.24.04.2]
polkitd/noble-security 124-2ubuntu1.24.04.3 amd64 [upgradable from: 124-2ubuntu1.24.04.2]