Weekly review follow-up: remove global SSH SetEnv TERM override

[Copilot]

This weekly review covered recent commits/PRs and open issues for leaks, compatibility regressions, and low-risk improvements. One actionable regression was found in SSH config behavior and corrected.

• Compatibility regression cleanup

  • Removed global SetEnv TERM=xterm-256color from ssh/config (Host * block).
  • This restores the intended post-review state where SSH sessions are not forced to export TERM for every host.

• Scope

  • No broader config refactors.
  • Kept change surface to one line in one file.

Host *
    ControlMaster auto
    ControlPath ~/.ssh/controlmasters/%r@%h:%p
    ControlPersist 1800
    Compression yes