- Snapshot fields at start of performSave to avoid race with user edits
during async save (fields could change between await and lastSaved update)
- Only update lastSaved tracking on successful save, so failed saves
are retried on the next debounce cycle
- Stop restoring title after Untitled fallback in autoSave(), which was
re-triggering the auto-save effect
- Capture note count before opening editor in empty-note e2e test
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>