in my .gitconfig i have

[alias]
	glg = log --oneline --decorate --all --graph

This allows me to get a quick overview over all branches with pushes that are recent enough for most cases.

Mine is a bit longer and includes automatically removing unused dependencies: alias update='sudo apt update && sudo apt upgrade && flatpak update && sudo apt autoremove --purge && flatpak remove --unused --delete-data && notify-send '\''update done'\'''

for 1: kdeconnect or warpinator

For the conversion to lossy, git smudge/clean filters might work. Afaik git-lfs works with them. In general git-lfs might be something interesting for your use case.