- sw.js: suppress notification when the target chat tab is already focused
(clients.matchAll visibility check before showNotification)
- generation_task.py: provide meaningful body for tool-only responses
(lists tool names instead of sending an empty string that browsers discard);
promote scheduling failure from debug to warning
- push.py: promote send errors from warning to error with exc_info;
log successful sends at INFO so they're visible in normal operation
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>