initCalendar() awaited fetchAndRender() BEFORE binding the topbar/settings/menu
handlers, so any error from /caldav/events (e.g. a transient 500) threw out of
init and left the buttons dead — the reported "settings won't open". Same root
cause as the reload-logout bug: app wiring must not depend on event data loading.
Bind all handlers first, then fetch inside try/catch (errors are logged + shown
as a toast, no longer fatal). v75.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>