docs(shopfloor): plant-view kanban redesign spec
Replaces per-step-grouped kanban with department-grouped (9 fixed columns).
One card per fp.job; recipe step count no longer drives layout width.
- 9 fixed columns in process sequence: Receiving / Masking / Blasting /
Racking / Plating / Baking / De-Racking / Final inspection / Shipping
- new fp.work.centre.area_kind Selection + step_id.area_kind related
- 13 mutually-exclusive card states with explicit precedence list and
matching _compute_card_state dispatcher
- Variant C card: WO header, customer/PN/qty/PO, recipe/spec, tag chips,
current step + tank + state chip, 9-step mini-timeline, progress +
operator pill + icon row
- /fp/landing/plant_kanban endpoint returns columns + denormalized cards
- MVP uses existing single-station pairing UX; M2M field structure is
forward-compatible for cross-trained operators (Phase 2)
- Feature flag x_fc_shopfloor_layout for parallel rollout
Deferred to Phase 2: drag-drop, sibling grouping, bottleneck heatmap,
manager-specific KPIs, phone breakpoint, sort customization,
quick-action sheet.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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