Merge branch 'remove-mountains' into main

Remove mountain terrain (forest covers the high elevation band for now).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Mods/Core/Defs/Terrain/Terrain.json

@@ -19,7 +19,7 @@
         { "chance": 0.20, "options": ["Strawberry", "Raspberry"] },
         { "chance": 0.14, "options": ["DandelionA", "DandelionB", "DandelionC", "DaylilyA", "DaylilyB", "RoseA"] }
       ] },
-    { "defName": "Forest",    "label": "terrain.forest",    "maxHeight": 0.85, "color": [44, 110, 50],
+    { "defName": "Forest",    "label": "terrain.forest",    "maxHeight": 1.01, "color": [44, 110, 50],
       "isLand": true, "surface": "terrain/surfaces/soil", "fertility": 1.6,
       "scatter": [
         { "chance": 0.35, "options": ["TreeOakA", "TreeOakB", "TreeBirchA", "TreeGrayPineA",
@@ -28,8 +28,6 @@
         { "chance": 0.16, "options": ["BushA", "BushB", "BushC"] },
         { "chance": 0.14, "options": ["Strawberry", "Raspberry"] },
         { "chance": 0.16, "options": ["GlowstoolA", "GlowstoolB", "TimbershroomA", "TimbershroomB", "NutrifungusA"] }
-      ] },
-    { "defName": "Mountain",  "label": "terrain.mountain",  "maxHeight": 1.01, "color": [136, 132, 128],
-      "surface": "terrain/surfaces/roughhewnrock", "fertility": 0.2, "blocksLight": true }
+      ] }
   ]
 }

Mods/Core/Languages/en/ui.json

@@ -146,7 +146,6 @@
   "terrain.sand": "sand",
   "terrain.grass": "grass",
   "terrain.forest": "forest",
-  "terrain.mountain": "mountains",
   "plant.oak": "oak",
   "plant.birch": "birch",
   "plant.pine": "pine",

Mods/Core/Languages/ru/ui.json

@@ -146,7 +146,6 @@
   "terrain.sand": "песок",
   "terrain.grass": "трава",
   "terrain.forest": "лес",
-  "terrain.mountain": "горы",
   "plant.oak": "дуб",
   "plant.birch": "берёза",
   "plant.pine": "сосна",

src/LittleSim/Scenes/WorldScene.cs

@@ -70,8 +70,8 @@ public sealed class WorldScene : Scene
     private SkillSet _skills = null!;
     private float[] _cellFertility = [];
     private bool[] _cellLand = [];
-    private bool[] _cellOccluderBase = []; // горы (статично из террейна)
-    private bool[] _cellOccluder = []; // горы + зрелые деревья (пересобирается лайтмапом)
+    private bool[] _cellOccluderBase = []; // светонепроницаемый террейн (статично; сейчас такого нет)
+    private bool[] _cellOccluder = []; // террейн-окклюдеры + зрелые деревья (пересобирается лайтмапом)
 
     /// <summary>Новый мир из конфига.</summary>
     public WorldScene(WorldConfig config)