[ZSH] Pin terminal title to user@host over ssh

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

zsh/lib/interactive.zsh

@@ -108,3 +108,10 @@ pastefinish() {
 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
+    ZSH_THEME_TERM_TITLE_IDLE='%n@%m'
+    add-zsh-hook -d preexec omz_termsupport_preexec
+fi