The Calendar grid (day-cells with project bars) is great for seeing
which projects had activity on a given day, but bad for seeing how
long any single deployment lasted. The Gantt view inverts that —
one row per project, horizontal bars per assignment window — so an
operator can read durations at a glance.
Service layer
- backend/services/deployment_history.py extends each project's
payload with `bars`: a list of {unit_id, location_id, location_name,
start, end, is_active, source} for every UnitAssignment clipped to
the visible 12-month window. Location names are batch-resolved.
Same cost as before since the underlying assignment scan is the
same; just additional data in the response.
Template
- Tab switcher at the top of /tools/deployment-history toggles
between Calendar and Gantt views. URL hash (#gantt) preserves the
active view across month-nav (Prev / Next / Recent buttons within
the Gantt view link to ?...#gantt to stay on the same tab).
- Gantt view is a plain SVG with:
- Left 220px label gutter: project color dot + truncated name,
whole row clickable → opens the project page
- Right area: horizontal time axis with month gridlines + labels,
"today" dashed orange line, one row per project
- One bar per assignment in that row, colored by project, reduced
opacity for closed assignments, blue outline for metadata-
backfilled assignments, white tip on the right edge of active
bars
- Hover any bar → tooltip with unit + location + window
- Alternating row backgrounds for readability.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
serversdown
2b8e9168c3