Let tmux alerts actually reach the bar

The tmux alert hooks fire omarchy-shell through run-shell, and run-shell
builds its own environment rather than passing the server's along, so the
hook ran without WAYLAND_DISPLAY. qs matches instances by display, so every
refresh from a bell died at "omarchy-shell is not running", which -q then
swallowed by design.

That left the indicator with no way to turn itself on. Its five second poll
only runs while the indicator is already active, so an alert raised after
startup was invisible until the shell happened to restart with the window
still flagged. The icon appeared roughly never.

Recovering the display from the socket in XDG_RUNTIME_DIR fixes it in the
one place that needs it, and covers any other caller reaching the shell from
a stripped environment rather than just the tmux hooks.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

bin/omarchy-shell

@@ -40,6 +40,13 @@ fi
 [[ -n ${OMARCHY_PATH:-} ]] || fail "OMARCHY_PATH is not set"
 [[ -f $OMARCHY_PATH/shell/shell.qml ]] || fail "omarchy-shell config not found: $OMARCHY_PATH/shell/shell.qml"
 
+# qs matches instances by display, and tmux run-shell strips WAYLAND_DISPLAY
+# from hooks, so recover it from the compositor socket when it is missing.
+if [[ -z ${WAYLAND_DISPLAY:-} ]]; then
+  socket=$(ls -t "${XDG_RUNTIME_DIR:-/run/user/$UID}"/wayland-[0-9]* 2>/dev/null | grep -v '\.lock$' | head -n1)
+  [[ -n $socket ]] && export WAYLAND_DISPLAY=${socket##*/}
+fi
+
 if [[ $1 == "shell" && ( $2 == "summon" || $2 == "toggle" ) ]] && (( $# == 3 )); then
   set -- "$1" "$2" "$3" "{}"
 fi