A task can be split into worked segments separated by gaps on a single row. The overall span, dependencies,
and drag/resize all keep working — the segments ride along.
How to interact
"Implementation" starts pre-split into two worked spans with a gap.
Split "Testing" cuts it at Jun 18 and resumes Jun 22 (a 3-day gap).
Drag a split bar — all its segments move together. Resize a handle — the
outer segment adjusts.