[ZSH] Pin user@host title in sudo/su shells too

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

zsh/lib/interactive.zsh

@@ -109,9 +109,8 @@ zstyle :bracketed-paste-magic paste-init pasteinit
 zstyle :bracketed-paste-magic paste-finish pastefinish
 ZSH_AUTOSUGGEST_CLEAR_WIDGETS+=(bracketed-paste)
 
-# Over ssh, pin the terminal title to user@host (no cwd, no running command):
-# the local tmux labels ssh panes with it (see main's .tmux.conf).
-if [[ -n $SSH_CONNECTION ]]; then
+# Pin the terminal title to user@host (no cwd, no running command): the local
+# tmux labels ssh panes with it (see main's .tmux.conf). Unconditional, as
+# sudo -s/su drop $SSH_CONNECTION.
 ZSH_THEME_TERM_TITLE_IDLE='%n@%m'
 add-zsh-hook -d preexec omz_termsupport_preexec
-fi