fix(tmux): avoid index error creating new window

And ensure new windows is created after the last one

modules/home-manager/cli/tmux/files/create-tmux-session.sh

@@ -104,7 +104,7 @@ tmux_hsplit() {
 tmux_neww() {
   local name="$1"
   debug "execute neww with name '${name}'"
-  local command=(tmux new-window -t "$SESSION" -c "$CURRENT_PATH")
+  local command=(tmux new-window -t "${SESSION}:$" -c "$CURRENT_PATH" -a)
   if [[ -n "$name" ]]; then
     command+=(-n "$name")
   fi