The manual Rescan set a persistent "Rescanning friends…" status but
nothing ever cleared it: the probe pass emits per-friend presence events
with no "done" signal, so the banner stuck forever (an offline friend's
probe can take up to the 10s IO timeout, and there was no terminal event
after).
Core now emits a `FriendsRescanned` UiEvent after the manual pass finishes
(only the on-demand button, never the 15s auto-refresh, so the status bar
isn't churned each interval). The GUI replaces the transient banner with
"Friends rescanned." — guarded so it won't clobber a status the user has
since triggered. Invisible mode probes no one, so the button now explains
that instead of showing a banner that resolves with nothing changed.
469 lib tests pass, clippy clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
molluskandClaude Opus 4.8
d059386aee