zsh: try tmux ssh again

These pretzels are making me thirsty

Author: itspriddle

zsh/plugins/tmux-ssh.zsh

@@ -0,0 +1,11 @@
+# Update SSH_AUTH_SOCK from tmux global environment when in tmux
+# This ensures SSH agent forwarding works after reattaching to old sessions
+_update_tmux_ssh_auth_sock() {
+  if [ -n "$TMUX" ]; then
+    eval $(tmux showenv -g SSH_AUTH_SOCK 2>/dev/null)
+  fi
+}
+
+# Run on every prompt to keep existing shells updated
+autoload -Uz add-zsh-hook
+add-zsh-hook precmd _update_tmux_ssh_auth_sock