The bar hosts the StatusNotifierWatcher in-process (sni_watcher.py), so the
*_sync proxy creation and RegisterStatusNotifierHost call blocked the main
loop waiting on a reply only that same loop could produce — a self-deadlock
freezing the whole bar (clock, holo intro) until the 25s D-Bus timeout. Switch
to new_for_bus + call (async, fire-and-forget).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>