Move ./emmathorpe -> ./lyrathorpe (git mv preserves history) and rename the MBP/X1 nixosConfiguration names to lyrathorpe-mbp / lyrathorpe-x1c. The EDaaS host keeps its emmathorpe-edaas name and Emma Thorpe identity; it still imports the shared (renamed) config dir.
Derivation outputs are byte-identical to before; pure relabel.
Thread username and fullName per host through the flake host table and specialArgs / home-manager.extraSpecialArgs, so user.nix and git.nix derive identity instead of hardcoding it.
MBP and X1 now provision user lyrathorpe (Lyra Thorpe). EDaaS retains emmathorpe (Emma Thorpe) and its wsl.defaultUser; work commit email is unchanged.