nteract/semiotic

Added

• Sequence diagram kit. semiotic/recipes now exports layoutSequence
  (linear spines, span-arc packing, shared-edge partition) alongside
  layoutChipStrip, packSpanLevels, scaleArcBand, spanArcPath, and
  partitionSharedEdges for hand-built sequence and span layouts.
• Grid observatory recipe + example. A new "The Grid Is the Real AI
  Infrastructure" example ships with a reusable gridObservatory recipe module
  (fuel-stack series, reserve-margin snapshots, threshold bands, and event
  annotations) exported from semiotic/recipes.
• Report-style example. The Semiotic Standard example gained a
  report-oriented "Plate C" layout demonstrating inline, context, and table
  chart deployments, and the Analyst Adventure example gained a secret-warp
  room and expanded Forecast Vault interaction.
• Recipe chrome helpers. recipeChrome adds hullFromBoxes (and the
  HullBox type) for convex-hull enclosures around grouped marks.

Changed

• Physics pipeline refactor. Overflow eviction and quiescence tracking were
  extracted into dedicated modules. Settling now recognizes sustained
  quiescence as atRest in addition to full sleep, so simulations settle and
  rerun reliably even when a straggler or tethered body never formally sleeps
  (GaltonBoard with many balls, GauntletChart force-held properties). Gauntlet
  chrome now gates to a compact layout and pop bursts scale with body size.
• Network scene-rebuild stability. StreamNetworkFrame uses a shared
  rebuildSceneNow path that avoids duplicate scene builds during hydration,
  keeps post-layout/ingest scene state current, and syncs hover/particle color
  caches from the authoritative scene fills.
• Leaner entry graphs. Brush overlays for MinimapChart and
  ScatterplotMatrix (and the ordinal/XY brush overlays) are now lazy-loaded,
  and a chunk-aware bundle-size gate guards the reduction.
• SVG serializer split. Ordinal scene-node SVG rendering moved into
  SceneToSVGOrdinal with shared helpers in sceneToSVGShared, keeping SSR
  alignment intact under the file-size limits.
• Small-mode histograms. Histogram sparkline category padding now defaults
  to 0 for readability at small sizes.
• Schema/capability metadata. ProcessSankey, PieChart, and related
  capability and validation metadata were refreshed so suggestions and prop
  validation reflect the current API.

Fixed

• SSR/CSR render parity. renderChart and static SVG output now match the
  browser for mixed line+area fills, semantic gradients, line bands, pie/donut
  start angles, swimlane value extents and hatch fills, treemap colorBy and
  parent labels, range-mode candlesticks, streamgraph (baseline="wiggle")
  stacked areas, hierarchy and network styling, open-ended band annotations,
  and the LineChart series features (forecast, anomaly, directLabel,
  gapStrategy, showPoints), Sankey styleRules, and top-level
  autoPlaceAnnotations. Regressions are guarded by dedicated parity tests.
• Annotation editorial visibility. Retracted and superseded annotations are
  now hidden consistently across the client and server render paths.
• Imperative ref stability. The shared imperative handle and ordinal
  replace support were stabilized across re-renders.