- Clicking any past day dot now opens a stats panel (read-only for days older than yesterday)
- Entry form and delete buttons hidden for non-editable days
- Backend silently restores locked offsets (< yesterday) on PATCH, preventing backdated edits
- Negative buffer no longer shows green: badge and progress bar are amber/red when buf < 0
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
