Phase 3: World generation — procedural tilemap for Catalytic Wastes

- simplex-noise with seeded PRNG (mulberry32) for deterministic generation
- Biome data: 8 tile types (scorched earth, cracked ground, ash sand,
  acid pools, acid shallow, crystals, geysers, mineral veins)
- Elevation noise → base terrain; detail noise → geyser/mineral overlays
- Canvas-based tileset with per-pixel brightness variation
- Phaser tilemap with collision on non-walkable tiles
- Camera: WASD movement, mouse wheel zoom (0.5x–3x), world bounds
- Minimap: 160x160 canvas overview with viewport indicator
- 21 world generation tests passing (95 total)

Co-authored-by: Cursor <cursoragent@cursor.com>

src/data/biomes.json

@@ -0,0 +1,38 @@
+[
+  {
+    "id": "catalytic-wastes",
+    "name": "Catalytic Wastes",
+    "nameRu": "Каталитические Пустоши",
+    "description": "A blasted landscape of scorched earth, acid pools, and crystalline formations",
+    "descriptionRu": "Опалённый ландшафт из выжженной земли, кислотных озёр и кристаллических формаций",
+    "tileSize": 32,
+    "mapWidth": 80,
+    "mapHeight": 80,
+    "tiles": [
+      { "id": 0, "name": "scorched-earth", "nameRu": "Выжженная земля", "color": "#2a1f0e", "walkable": true,  "damage": 0, "interactive": false, "resource": false },
+      { "id": 1, "name": "cracked-ground", "nameRu": "Потрескавшаяся земля", "color": "#3d2b14", "walkable": true,  "damage": 0, "interactive": false, "resource": false },
+      { "id": 2, "name": "ash-sand",       "nameRu": "Пепельный песок",       "color": "#4a3d2e", "walkable": true,  "damage": 0, "interactive": false, "resource": false },
+      { "id": 3, "name": "acid-pool",      "nameRu": "Кислотное озеро",       "color": "#1a6b0a", "walkable": false, "damage": 10, "interactive": false, "resource": false },
+      { "id": 4, "name": "acid-shallow",   "nameRu": "Кислотная отмель",      "color": "#3a9420", "walkable": true,  "damage": 3,  "interactive": false, "resource": false },
+      { "id": 5, "name": "crystal",        "nameRu": "Кристаллическая формация", "color": "#7b5ea7", "walkable": false, "damage": 0, "interactive": false, "resource": false },
+      { "id": 6, "name": "geyser",         "nameRu": "Гейзер",                "color": "#e85d10", "walkable": false, "damage": 0, "interactive": true,  "resource": false },
+      { "id": 7, "name": "mineral-vein",   "nameRu": "Минеральная жила",      "color": "#c0a030", "walkable": true,  "damage": 0, "interactive": false, "resource": true  }
+    ],
+    "generation": {
+      "elevationScale": 0.06,
+      "detailScale": 0.15,
+      "elevationRules": [
+        { "below": 0.22, "tileId": 3 },
+        { "below": 0.30, "tileId": 4 },
+        { "below": 0.52, "tileId": 0 },
+        { "below": 0.70, "tileId": 1 },
+        { "below": 0.84, "tileId": 2 },
+        { "below": 1.00, "tileId": 5 }
+      ],
+      "geyserThreshold": 0.93,
+      "mineralThreshold": 0.90,
+      "geyserOnTile": 4,
+      "mineralOnTiles": [0, 1, 2]
+    }
+  }
+]