fix(level-builder): 锚点补偿+旋转修复+天空盒+解析器去重

- asset_mapping: 38种BSP资产实测锚点+pivot_offset_xy自动补偿
- scene_builder: Rotator改关键字参数修正旋转轴映射
- scene_builder: spawn前XY锚点补偿(支持Yaw旋转)
- scene_builder: 新增ExponentialHeightFog+大气效果后处理
- build_cmdline: 构建后自动添加雾+GameMode+DirectionalLight大气
- build_guide_parser: 去重+全局地面+旋转列名兼容+边界段范围修正
- BarrierWall实际尺寸修正(60×210非20×100)
- 搭建指南: 全局地面中心坐标+西边界旋转统一+院门改双开门

tools/level-builder/build_cmdline.py

@@ -145,11 +145,35 @@ if not json_path.exists():
 
 
 # ---- 导入并执行构建 ----
-from builder.scene_builder import build_level
+from builder.scene_builder import build_level, setup_post_build
 
 print(f"[LevelBuilder] 开始构建...")
 build_log = build_level(str(json_path), clear_existing=True)
 
+# ---- 后处理：GameMode + 大气 + ExponentialHeightFog ----
+print("[LevelBuilder] 执行关卡后处理...")
+try:
+    # 添加 ExponentialHeightFog（如果场景中不存在）
+    all_actors = unreal.EditorLevelLibrary.get_all_level_actors()
+    has_fog = any("ExponentialHeightFog" in a.get_class().get_name() for a in all_actors)
+    if not has_fog:
+        editor_subsystem = unreal.get_editor_subsystem(unreal.EditorActorSubsystem)
+        fog_actor = editor_subsystem.spawn_actor_from_class(
+            unreal.ExponentialHeightFog,
+            unreal.Vector(0, 0, 0)
+        )
+        if fog_actor:
+            fog_actor.set_actor_label("LVL_Global_ExpHeightFog")
+            fog_actor.set_folder_path("LVL_SuburbanV01/Global/Lighting")
+            fog_comp = fog_actor.get_component_by_class(unreal.ExponentialHeightFogComponent)
+            if fog_comp:
+                fog_comp.set_editor_property("fog_density", 0.015)
+            print("[LevelBuilder] ✅ ExponentialHeightFog 已添加")
+except Exception as e:
+    print(f"[LevelBuilder] ⚠️ ExponentialHeightFog 添加失败: {e}")
+
+setup_post_build()
+
 
 # ---- 保存关卡 ----
 print("[LevelBuilder] 保存关卡...")