THEME PACKS (M18a): winter, spooky, tropical, autumn islands on four new kits

- Import pipeline: Holiday/Graveyard/Pirate/Survival kits packed (one
  colormap each); DEFAULT_PACKS grows to six.
- decor.ts: SETTINGS rows carry pack + finite flags; pickSetting draws
  ONLY the historical nature trio (the genVersion guard — finite stream
  byte-identical, golden_tracks untouched); settingByName reaches the four
  new regex tables (patterns + scale ranges measured per pack: pirate is
  ~2.5-3x nature scale, survival props tiny).
- islands.ts: BiomeSpec capId fully-qualified, per-biome landmark lists +
  landmarkScale (default = the historical nature statue list, draws
  byte-identical); four appended rows (w 1.2/0.8/1.2/1.0 — nature keeps
  ~70%, a themed island is an event). Caps reuse the 1x1 nature ground
  tile; measured: no themed pack ships a clean 1x1 cap.
- Client: assets.ts loads a DECOR_PACKS list + manifests map; catalogs
  (client + goldenCatalog + all gen-side tests) carry all five packs —
  settings resolve against the catalog, so pack presence shapes output.
- Presentation: islandRender biome tints (snow-creep courses, graveyard
  gloom, sandstone strata, ochre mottling; snow/sand cap repaints; pinned
  foliage leans); atmosphere drawZone takes a biome bias (zone's dominant
  island biome multiplies mood weights — winter leans snowdrift etc.,
  same rng draw shape, presentation-only).
- Tests: finite-trio lock, per-row manifest resolution, 40-seed themed
  scan (placement resolution + cap 1x1 law). 184 green, check clean.
- Endless goldens re-pinned (biome reshuffle, island-local); scenario
  pins all held; genVersion g491fc4c7a685 unchanged.

commit

ad5a11148863dca8b4d2d345465fe3982e7cbdd9

parent

1c0d8ec2b0e44a5bf85de6f00ef329b835a5f442

author

Dami <dami.etoile@gmail.com>