- Fix cols overflow: use (containerWidth - GAP) formula so the grid
never exceeds the container width
- Explicitly pin "unknown" date keys to the end of the sort rather than
relying on alphabetical accident ("u" > digits)
- Guard buildLabel against non-YYYY-MM keys with finite/range checks
and an isNaN fallback to "Unknown Date"
- Clear similarSourceFolderId, similarFolderId, and similarCrop when
switching to the timeline view so all similar-state is consistently
reset
LyAhn
a2804d8c1b