v0.22.0

Added

• Content-aware export canvas (mapExportDimensions) — map exports size the
  canvas to the content's own aspect ratio instead of a fixed box, so regional
  maps no longer letterbox.
• Colorize — region maps with no data auto-colour every region a distinct
  pastel (greedy 4-colouring so no neighbours share a hue); no-colorize opts
  out.
• New palettes — Atlas, Slate, Blueprint (cyanotype), and Tidewater
  (nautical).
• Relief is unconditional — only no-relief hides it; now also shown on the US
  national Albers view.
• Coastal ocean anchors and container-region labels so zoomed-in coastal frames
  still label the surrounding ocean and the parent region.
• POI-only maps fit-zoom to their containing region.
• Route legs and labels are click-to-line navigable.

Changed

• Wider context pad for region/choropleth maps.
• Legend controls can be app-hosted (controlsHost: 'app'), letting the host UI
  own the colouring controls.
• Removed the Bold palette.

Fixed

• Antimeridian-crossing landmasses (e.g. Russia) now render in regional views.
• Ocean reads clearly as water and neutral land reads as land (contrast tuning).
• Inset coastline water-lines clipped to their box, with a water moat around
  inset borders.
• Adjacent region/POI labels no longer overlap at small scales; label halo gated
  on overflow.

Performance

• Coastline and mask geometry collapsed into compound paths for faster
  legend-hover recolours on heavy maps.