v0.10.0

Layered graphs: a component family that shows one graph split into layers by a node attribute (3D
layer stack, lanes, adjacency matrix and hive plot) on shared selection, link-following and
filter state, with controls, an inspector and a ready-made explorer. Also faster organic and
orthogonal layouts and cleaner ux-navigation routes.

Added

• Layered graph framework (#330). Input is the GraphCanvas node and
  edge model; one node attribute (layerBy) assigns layers, with multiValue (first, last,
  exclude, all) and missingValue policies.
  • buildLayeredIndex bundles parallel edges into links and derives categories, cross-layer
    flags, layer pairs, degrees and two-letter predicate codes; bad input goes to issues
    instead of throwing.
  • computeReach: selecting a node lights its direct links, then follows cross-layer links
    away from the clicked layer for follow more hops.
  • Shared state: useLayeredGraph and LayeredGraphContext own selection, follow, filters,
    predicate-label mode, layer focus and plane layout, controlled or uncontrolled, with
    snapshot / restore. One instance can drive several views.
  • Helpers: isLinkVisible, linkEmphasis, nodeEmphasis, layoutLayers,
    mixLayerPositions, orderings, placeEdgeLabels with sampled lineCurve / quadCurve /
    cubicCurve, and arrowHeadPoints.
  • Tokens: --graph-hop-1…3 (amber reach ramp), --graph-link-1…6 (link categories),
    --graph-layer-1…12 (layer palette), --graph-pill-bg and --graph-plane-fill-alpha, for
    light and dark canvas.
  • GraphNodeData and GraphEdge gain an optional attributes bag (GraphAttributeValue),
    which GraphCanvas ignores.
• LayerStack (#332): layers as stacked translucent planes in an SVG
  perspective projection, with cross-layer links between them and a drill-through column under
  the selection.
  • Camera presets (stack, exploded, top, profile), drag to orbit, wheel zoom once the
    scene has focus, a turntable (off under reduced motion), layer gap, layer focus and an
    animated independent/coupled plane layout.
  • An imperative handle (applyPreset, setCamera, zoomBy, fit, setTurntable,
    focusLayer, select).
  • Keyboard navigation of node labels. The projection math (createProjector, presets, …) and
    useTween are exported.
• GraphCanvas layout="layer-lanes" (#332): one swimlane per layer,
  nodes packed in rows ordered so linked nodes line up, arcs within a lane and curves between
  lanes, horizontal or vertical. Keeps tooltips, popovers, renderNode, pan/zoom and the
  toolbar. New props layeredGraph, layering, layeredGraphOptions and laneOptions; the
  geometry is exported as layoutLanes and laneLinkCurve.
• AdjacencyMatrix (#330): a directed block matrix grouped by layer,
  with cross-layer block counts, category-coloured cells, the reach ramp, predicate codes and a
  code legend.
• HivePlot (#332): one axis per layer, doubled so links within a layer
  span the gap; nodes ranked outward; keyboard navigation along and between axes. Geometry
  exported as hiveLayout and hiveLinkGeometry.
• Controls and inspector (#332): FollowControl,
  PredicateLabelControl, PlaneLayoutControl, LinkCategoryFilter, LayerList,
  LayerPairList, BridgeNodeList and ReachInspector (with reachRelationships). Each reads
  a graph prop or the context.
• LayeredGraphExplorer (#332): the views, controls, inspector and a
  status line in one component, with ViewSwitcher and CameraControls. A controls prop turns
  each piece of chrome on or off. Selection, follow and filters carry across view switches, and
  the stack keeps its camera.
• GraphInspector: RelationshipLink gains optional hop, via and layer fields
  (layer swatch, +n hop badge, "via X · predicate" line). Existing output is unchanged.
• Docs: a "Layered graphs" section with a page per component
  (#333).

Changed

• organicLayout is about 3x faster on large graphs (#326): 1000-node
  random graph 2.1 s → 0.6 s, DR spec graph 140 ms → 62 ms. A stress polish now runs before
  overlap removal on components of 300 nodes or fewer, so small layouts can shift slightly;
  incremental re-solves are unchanged.
• orthogonalLayout is several times faster on large graphs (#327):
  DR spec graph 14.6 s → 5.2 s (39 s → 3.5 s with all predicates); a 400-node community graph
  and a 401-node star that did not finish in 180 s now take 12 s and 0.5 s. Output is unchanged
  except on components with more than 64 candidate roots (for example long chains), where the
  root search is now capped.

Fixed

• layout="ux-navigation" navigation routes go through free gaps between boxes and take the
  cheapest clear path, instead of detouring round the whole drawing (#324).
  Routes leave and arrive perpendicular to their port side, parallel routes are kept apart, and
  routing cost is bounded (400 boxes / 400 routes: about 140 ms).
• Large ux-navigation sitemaps: routes no longer pass through other nodes or take long
  detours (#325). On a 582-node sitemap, segments through nodes go from 26
  to 0 and the worst route-length ratio from 8.1 to 1.2. A shifted segment no longer lands on
  another route's line.